Wednesday

April 16, 2014

April 16, 2014

Number of results: 21,251

**statistics- normal approximation**

Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
*Wednesday, October 27, 2010 at 10:22pm by don*

**statistics- normal approximation**

find the normal approximation for the binomial probability that x=5, where n=12, and p=0.7. compare this probability to the value of p(x=5). * the only thing that i have come up with is that value of p(x=5) is o.29 when looking it up on the table. how would i successfully ...
*Wednesday, October 27, 2010 at 10:22pm by mary- where do i begin*

**STATISTICS**

(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq < 5 than state the ...
*Sunday, June 2, 2013 at 3:10pm by Jenn*

**Statistics**

(a) With n=12 and p =0.4 find the binomial probability that p(9) by using a binomial probability table. (b) np ¡Ý5, nq¡Ü5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, is np < 5 or nq < 5 than state the ...
*Saturday, June 1, 2013 at 8:54pm by Jenn*

**statistics**

With n=13 and p= 0.7, find the binomial probability p(9) by using a binomial probability table. If np> and nq> 5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial, if np<5 or nq<5 then state that the ...
*Monday, November 25, 2013 at 9:36pm by angela*

**statistics**

If n = 100 and p = 0.02 in a binomial experiment, does this satisfy the rule for a normal approximation? Why or why not?
*Thursday, August 25, 2011 at 10:17am by Laynette*

**statistics**

Answer the following: (A) Find the binomial probability P(x = 5), where n = 12 and p = 0.70. (B) Set up, without solving, the binomial probability P(x is at most 5) using probability notation. (C) How would you find the normal approximation to the binomial probability P(x = 5...
*Thursday, December 6, 2012 at 1:16am by Huffette*

**statistics/probability**

One statistic used to assess professional golfers is driving accuracy, the percent of drives that land in the fairway. Driving accuracy for PGA Tour professionals ranges from about 40% to about 75%. Tiger Woods hits the fairway about 60% of the time. One reason why the Normal ...
*Thursday, June 17, 2010 at 10:47pm by Natash*

**college statistics**

find the normal approximation for the binomial probability that x=5 where n=14 and p=0.3 compare this to the value of p(x=5) found in table 2
*Tuesday, June 5, 2012 at 2:18pm by melba*

**Statistics**

Note: For the second problem, we use the normal approximation to the binomial distribution when finding the mean and standard deviation.
*Monday, December 16, 2013 at 12:53pm by MathGuru*

**statistics-normal approximation, distrubution**

find the normal appproximation for the binomial probabiolity the x=5,where n=12, and p= 0.7. compare this to the value of p(x=5). *please show calculations and work. want to compare my calculations. thank you. mary
*Thursday, October 28, 2010 at 3:16pm by mary- can someone please solve,lost*

**Statistics**

But, I'm suppose to use the normal distribution approximation to the binomial distribution.
*Friday, July 20, 2012 at 5:47pm by Ann*

**statistics please help deadline 12am**

find the normal approximation for the binomial probability that x=5,where n=12, and p=0.7compare probability to table b of normal distributions of table 2. The only thing that i know so far is that p(x=5) is equivalent to 0.29. how would i complete this question? please ...
*Thursday, October 28, 2010 at 9:06pm by vedry frustrated please help and show work*

**Statistics**

Find the normal approximation for the binomial probability that x = 5, where n = 12 and p = 0.7. Compare this probability to the value of P(x=5) found in Table 2 of Appendix B in your textbook.
*Thursday, October 20, 2011 at 7:50am by jane*

**statistics, math, college**

if np >5 and nq>5 estimate P (fewer than 4) with n=13 p=0.4 by using normal distribution as an approximate to the binomial distribution if np <5 or nq< then state that the normal approximation is not suitable
*Tuesday, February 11, 2014 at 7:37pm by andrea*

**college ststistics**

A. find the binomial probability p(x=5) where n=14 and p=0.30. B. setup without solving the binomial probability p(x is at most 5) using probability notation C. how would you find normal approximation to the binomial probability p(x=5) in part A. please show how you would ...
*Sunday, June 3, 2012 at 4:55pm by melba*

**Statistics normal distribution**

54% of the children in a large city are boys. Using a suitable approximation, calculate the probability that a random sample of 1000 children contains more boys than girls ?
*Saturday, June 1, 2013 at 5:33pm by Kelvin*

**stastistics**

With n=13 and p=0.7, find the binomial probability P(9)by using a binomial probability table. If np> and nq>5, also estimate the indicated probability by using the normal distribution as an approximation to the binomial,if np<5 of nq<5 then state that the normal ...
*Friday, November 22, 2013 at 9:48pm by angela*

**Business Statistics**

In each case, sketch the two speciﬁed normal curves on the same set of axes: a A normal curve with m 20 and s 3, and a normal curve with m 20 and s 6. b A normal curve with m 20 and s 3, and a normal curve with m 30 and s 3. c A normal curve with m 100 and s 10, and a ...
*Thursday, August 30, 2012 at 1:48am by Marcia*

**Statistic**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores. This is simple enough that the approximation could be memorized.
*Friday, May 31, 2013 at 7:41pm by PsyDAG*

**MATH**

Answer the following: (A) Find the binomial probability P(x = 4), where n = 12 and p = 0.30. (B) Set up, without solving, the binomial probability P(x is at most 4) using probability notation. (C) How would you find the normal approximation to the binomial probability P(x = 4...
*Friday, November 11, 2011 at 1:19pm by Jennifer*

**statistics**

5. Suppose a manufacturer of computer chips is experiencing an average of 2% defective chips. (a) If a lot contains 1000 chips, what is the probability that more than 25 chips are defective? HINT. Use the normal approximation to the binomial.
*Sunday, March 23, 2014 at 12:35am by Marisol*

**Math**

Records show that 29% of all payments to a mail-order company are submitted after the due date. Suppose 50 payments are submitted this week. Let r be a random variable that represents the number of payments that are late. Use the normal approximation to the binomial to ...
*Sunday, August 7, 2011 at 8:36pm by Justina*

**STATISTICS**

500 is a fairly big number, so you can use a Normal approximation to the binomial distribution to work this out. The binomial parameters you want are N = 500 and P = 0.8. The mean is just N.P = 400. The standard deviation is sqrt(N.P.(1-P))=8.94. The 95% cutoff value from a ...
*Friday, April 2, 2010 at 7:17am by DQR*

**Calculus**

Use Newton's method to approximate a root of the equation (2 x^3 + 4 x + 4 =0) as follows. Let (x_1 = -1\) be the initial approximation. The second approximation (x_2) is ? and the third approximation (x_3) is ?
*Wednesday, November 11, 2009 at 4:31am by Salman*

**Math**

Use Newton's method to approximate a root of the equation 5sin(x)=x as follows. Let x1=2 be the initial approximation. The second approximation x2 is: and the third approximation x3 is:
*Saturday, July 19, 2008 at 5:45pm by Blair*

**calculus**

Use Newton's method to approximate a root of the equation 3sin(x)=x as follows. Let x1=1 be the initial approximation. The second approximation x2 is and the third approximation x3 is
*Tuesday, September 7, 2010 at 3:45am by kwack*

**statistics**

Let's assume the numbers are large enough so we can use a Normal approximation to the binomial distribution here. The mean and standard deviation of the binomial distribution will be Np and sqrt(Np(1-p)) respectively, where in this example N = 128 and p = 0.4, so the mean and ...
*Friday, October 5, 2012 at 4:06pm by David Q/R*

**Statistics**

Glad that you mentioned that an approximation is required. The question asks for exactly 90 seeds, which is discrete. Here's how I would proceed to approximate a discrete random variable from a continuous distribution. "Exactly 90" is approximately equal to the random variable...
*Friday, July 20, 2012 at 5:47pm by MathMate*

**statistics**

You intend to estimate a population proportion with a confidence interval. The data suggests that the normal distribution is a reasonable approximation for the binomial distribution in this case. Find the critical value that corresponds to a confidence level of 98%. (Report ...
*Sunday, July 22, 2012 at 9:22pm by robyn*

**math**

This site may help you understand normal distribution. http://www.netmba.com/statistics/distribution/normal/ The first one (letter a.) would depend upon the school. Some schools have many well-to-do families and only a few low-income famiies. Others would have more of a normal...
*Tuesday, August 11, 2009 at 4:10pm by Ms. Sue*

**calculus**

se differential, i.e., linear approximation, to approximate (8.4)^(1/3) as follows: Let f(x)=(x )^(1/3). The linear approximation to f(x) at x=8 can be written in the form y=mx+b where m is: and where b is: Using this, we find our approximation for (8.4)^(1/3) is
*Saturday, August 28, 2010 at 1:49am by jin*

**Statistics**

Many women take oral contraceptives to prevent pregnancy. Under ideal conditions, 1% will become pregnant within one year. In typcal use, 5% become pregnant. Choose 20 random women taking the pill. How many become pregnant in the next year? a. What is the probability that at ...
*Wednesday, August 4, 2010 at 8:23pm by Dawn*

**Statistics**

Assume it is known that the probability of birth is equal in all months. What is the probability that in the STAT class of 120 students, exactly 20 students have their birthdays in either August or September? Solve using (i) the exact Binomial distribution, (ii) the Normal ...
*Friday, February 28, 2014 at 9:56am by Lee*

**statistics**

No, a normal distribution has only one mode. A bimodal distribution is not normal, but it can indicate the possibility of two underlying normal distributions.
*Friday, October 28, 2011 at 9:40pm by PsyDAG*

**statistics**

Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has normal ditribution, the mean and the median are not equal. d. The graph of a normal ...
*Saturday, May 8, 2010 at 4:06pm by Michelle*

**statistics**

which of the following statements are correct? a. a normal distribuiton is any distribution that is not unusual. b. the graph of a normal distribution is bell-shaped. c. if a population has a normal distribution, the mean and the median are not equal. d. the graph of a normal ...
*Monday, August 16, 2010 at 9:48am by jeff*

**Statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. b. The graph of a normal distribution is bell-shaped. c. If a population has a normal distribution, the mean and the median are not equal. d. The graph of a ...
*Monday, April 19, 2010 at 2:10am by Jackie*

**statistics**

1. Which of the following statements are correct? a.A normal distribution is any distribution that is not unusual.b.The graph of a normal distribution is bell-shaped.c.If a population has a normal distribution, the mean and the median are not equal.d.The graph of a normal ...
*Friday, April 23, 2010 at 8:41am by nanny*

**statistics**

Which of the following statements are correct? a. a normal distribution is any distribution that is not unusual b. the graph of a normal distribution is bell-shaped c. if a population has a normal distribution, the mean and the median are not equal d. the graph of a normal ...
*Monday, May 10, 2010 at 11:09pm by Christine*

**Statistics**

Which of the following statements are correct? 1.A normal distribution is any distribution that is not unusual. 2.The graph of a normal distribution is bell-shaped. 3.If a population has a normal distribution, the mean and the median are not equal. 4.The graph of a normal ...
*Wednesday, July 14, 2010 at 12:45am by Christy*

**AP Statistics **

12) Which of the following statements is true? a) The sampling distribution of the difference between two proportions will always be normal. b) When comparing two population proportions, either sample proportion can be used as the unbiased estimate of the true population ...
*Thursday, March 14, 2013 at 4:53pm by Joker*

**Math- Statistics**

Use the normal approximation to the binomial distribution. mean = np = 80 * .6 = ? standard deviation = √npq = √(80 * .6 * .4) = ? Calculate. (Note: q = 1 - p) Next use z-scores: z = (x - mean)/sd x = 80 * .5 = ? Once you have the z-score, find the probability ...
*Sunday, May 5, 2013 at 10:57pm by MathGuru*

**Statistics**

Here is another method. If it approximates a normal distribution, you can use Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.
*Sunday, February 12, 2012 at 4:50pm by PsyDAG*

**CALC**

Use Newton's method to approximate a root of the equation x3+x+3=0 as follows. Let x1=–1 be the initial approximation. The second approximation x2 is _____? and the third approximation x3 is _____?
*Saturday, May 29, 2010 at 8:36pm by Adam*

**calculus**

Use Newton's method to approximate a root of the equation 3sin(x)=x as follows. Let x1=1 be the initial approximation. The second approximation x2 is and the third approximation x3 is I got x2=-1.454 but can't get x3 :(
*Wednesday, September 8, 2010 at 1:47am by HELLLLLPPPPPPP*

**calculus**

Use Newton's method to approximate a root of the equation 3sin(x)=x as follows. Let x1=1 be the initial approximation. The second approximation x2 is and the third approximation x3 is for x2 I got -1.454 which is right but I can't get x3
*Wednesday, September 8, 2010 at 1:03am by HELLLLLPPPPP*

**Statistics**

In a certain city of several million people, of the adults are unemployed. If a random sample of adults in this city is selected, approximate the probability that at least in the sample are unemployed. Use the normal approximation to the binomial with a correction for ...
*Saturday, March 1, 2014 at 8:56pm by Wendy*

**Math/Stats**

In the last senatorial election in New Jersey, the republican candidate got 48% of the vote. During the election an exit poll was conducted by radio station WSTAT. Ten voters selected at random where asked if they voted for the republican candidate. (a) Let X = "Number of ...
*Sunday, November 9, 2008 at 3:26pm by Xavier*

**statistics**

For any distribution (normal or not normal), the probability of selecting a score greater than the median is
*Sunday, September 4, 2011 at 6:47am by Helen*

**Statistics and Probability**

Why is a normal distribution called "normal"?
*Tuesday, March 19, 2013 at 3:20pm by Betty*

**Statistics and Probability**

Why is a normal distribution called "normal"?
*Tuesday, March 19, 2013 at 3:38pm by Betty*

**STATISTICS**

In a psychology experiment in which 100 volunteers were asked to read a paragraph about an engineer, 65 assumed that the engineer was male despite the fact that the paragraph did not specify gender (and avoided gendered pronouns such as “he” or “she”). If the null hypothesis ...
*Saturday, August 10, 2013 at 7:07pm by smoothjive*

**statistics**

What is the mean and standard deviation of the distribution of normal temperatures? Z = (100.6 - mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to this Z score. Come to your own ...
*Monday, May 10, 2010 at 11:54pm by PsyDAG*

**statistics**

A sample survey interviews an SRS of 263 college women. Suppose (as is roughly true) that 75% of all college women have been on a diet within the past 12 months. Using the Normal approximation, what is the probability (±0.001) that 82% or more of the women in the sample have ...
*Thursday, May 2, 2013 at 10:48pm by dais*

**Statistics**

A mound-shaped symmetrical distribution sounds normal to me. Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z scores.
*Tuesday, December 11, 2012 at 4:21pm by PsyDAG*

**statistics**

Your mail-order company advertises that it ships 95% of its orders within three working days. You select an SRS of 100 of the 5000 orders received in the past week for an audit. The audit reveals that only 91 of these orders were shipped on time. A) What is the sample ...
*Wednesday, April 24, 2013 at 4:31pm by Dylan*

**Calculus - Derivatives**

The approximation to a definite integral using n=10 is 2.346; the exact value is 4.0. If the approximation was found using each of the following rules, use the same rule to estimate the integral with n=30. A) Left Rule B) Trapezoid Rule The section deals with approximation ...
*Monday, September 29, 2008 at 10:05pm by UMich1344*

**statistics**

A normal distribution approximates a bell-shaped curve. Outliers to one side would skew the distribution. If the distribution was flat, having about the same frequencies throughout the distribution, this would be non-normal. Also a bimodal distribution would be non-normal, ...
*Sunday, November 24, 2013 at 7:06pm by PsyDAG*

**statistics**

For the first part: You can use a binomial probability table, or calculate by hand using the following formula: P(x) = (nCx)(p^x)[q^(n-x)] For the second part: Use the binomial approximation to a normal distribution. mean = np = 50 * .10 = ? standard deviation = √npq...
*Monday, May 7, 2012 at 8:23pm by MathGuru*

**Statistics**

Assuming a normal distribution, Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.
*Monday, December 12, 2011 at 10:10pm by PsyDAG*

**Statistics **

A manufacturing facility produces iron rods whose mean diameter is 2.5 inches with a standard deviation of 0.2 inch. If a sample of 50 metal rods produced by the facility were randomly selected, what is the probability that the mean of these rods will lie between 2.4 inches ...
*Monday, December 16, 2013 at 12:53pm by Steven *

**statistics**

Of all 3- to 5-year old children, 56% are enrolled in school (p=0.56). We are looking at a sample of 500 (n=500) such children, and this is thought to follow a binomial distribution. Use the normal approximation to the binomial to find the probability that at least 300 of ...
*Wednesday, March 7, 2012 at 4:58pm by Anonymous*

**Statistics(math)**

(20.47 S-AQ) A sample survey interviews an SRS of 252 college women. Suppose (as is roughly true) that 71% of all college women have been on a diet within the past 12 months. Using Normal approximation, what is the probability (±0.001) that 77% or more of the women in the ...
*Friday, June 7, 2013 at 12:46pm by Kelsey*

**statistics**

without the use of the standard normal tables, should techniques of calculus be used to find the probabilities concerning a normal distribution?
*Friday, August 20, 2010 at 12:44am by marie*

**statistics**

It would help if you proofread your questions before you posted them. You probably have a typo. With SD = 140, one SD below the mean (90) would be -50. This means that you do not have a normal distribution. However, if the distribution is normal, Z = (score-mean)/SD Insert the...
*Saturday, November 19, 2011 at 8:57pm by PsyDAG*

**statistics**

If 30% of people in an area registered voters and 15 people are selected at ramdom from this area; a. What is the probability thatexactly 3out of the15 people are registered voters? b. What is the probability that at most 3 out of the 15 people are registered voters> c. ...
*Wednesday, December 5, 2012 at 4:40pm by Erika Chicas*

**statistics**

From the data, mode = 32, median = 57 and mean 64, the distribution is definitely positively skewed (to the right). Unfortunately, I don't know Chevyshev's theorem, and I would not assume the distribution to be normal. However, for a normal distribution, Z = (score-mean)/SD ...
*Sunday, October 17, 2010 at 3:59pm by PsyDAG*

**statistics**

Use the normal approximation to the binomial distribution. Mean = np = 128 * .40 = 51.2 Standard deviation = √npq = √(128 * .40 * .60) = √30.72 = 5.54 Note: q = 1 - p Formula for z-scores: z = (x - mean)/sd With your data: z = (45 - 51.2)/5.54 = -1.12 Look at...
*Monday, November 5, 2012 at 11:07am by MathGuru*

**statistics**

68% is area within ± 1 SD of the mean. Mean and median in a normal distribution are the same value. What does that tell you? Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to ...
*Saturday, May 25, 2013 at 1:01pm by PsyDAG*

**statistics**

31.57-34.03 has no frequency approximation for example 0-9
*Wednesday, August 17, 2011 at 8:46pm by Odinakachi*

**statistics**

31.57-34.03 has no frequency approximation for example 0-9
*Wednesday, August 17, 2011 at 8:46pm by Odinakachi*

**statistics**

, which is the probability that the mean fat content in farm-raised trout is grams per pound or less. The sample is drawn from a population with mean and standard deviation . We do not know the shape of the population distribution, though, so it would seem that we have too ...
*Sunday, October 23, 2011 at 8:45am by Ms. Lynn*

**statistics**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. OR… what is the probability of being higher than the mean in a normal distribution?
*Sunday, May 12, 2013 at 11:25am by PsyDAG*

**STATISTICS**

In a psychology experiment in which 100 volunteers were asked to read a paragraph about an engineer, 65 assumed that the engineer was male despite the fact that the paragraph did not specify gender (and avoided gendered pronouns such as “he” or “she”). ...
*Tuesday, August 6, 2013 at 3:42pm by Susie*

**Approximation**

Find The Value Of (Sin 31) Using Approximation ?
*Monday, August 22, 2011 at 3:22pm by jack*

**Math**

at (3,5), the tangent line has slope f'(3) = 3/30 = .1 so, y-5 = .1(x-3) is the linear approximation near (3,5) If f(x) is concave up at x=3, the linear approximation will be low. f''(x) = (3-2x^3)/((x^3+3)^2 f''(3) = (3-18)/100 = -.15 so, f is concave down at x=3, and the ...
*Friday, March 16, 2012 at 1:57am by Steve*

**MATH**

Given a binomial distribution with n = 21 and p = 0.76, would the normal distribution provide a reasonable approximation? Why or why not?
*Wednesday, November 2, 2011 at 9:36pm by Jen*

**Statistics **

Parametric statistics assume a normal distribution.
*Tuesday, July 13, 2010 at 8:04am by PsyDAG*

**statistics**

If Z is a standard normal variable, find the probability that Z lies between -1.10 and -0.36 Use the table of the area under the normal distribution in the back of your statistics textbook to find the area between these Z values and the mean. Since they are both on the ...
*Sunday, August 5, 2007 at 9:47am by john*

**approximation fractions**

which math fraction is greater through approximation: 10/21 or 15/28?
*Friday, January 7, 2011 at 8:16am by Lecia*

**statistics**

A few hints: If you use the normal distribution as an approximation, then you will need to find the mean and standard deviation. mean = np = 13 * 0.7 = 9.1 standard deviation = √npq = √(13)(0.7)(0.3) = 1.65 (rounded) Note: q = 1 - p Next step: use z-scores z = (x...
*Monday, November 25, 2013 at 9:36pm by MathGuru*

**Statistics**

a) In a normal distribution, the mean = median = mode. What percentage are below the median? Z = (score-mean(/SD Calculate the Z score for b. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related ...
*Wednesday, May 4, 2011 at 7:55pm by PsyDAG*

**Statistics**

The standard normal distribution is the normal distribution with a mean of zero and a variance of one. So I would say C
*Sunday, October 28, 2007 at 11:53am by chester*

**statistics**

Will the sampling distribution of means be approximately normal if n=25 or so, even if the frequency distribution of X values is not normal?
*Sunday, September 25, 2011 at 4:55pm by Carol*

**statistics**

Have you calculated any of these to make a comparison? For example, range = 5, so you can eliminate A. Do the values form a normal distribution? If so, what do you know about a normal distribution?
*Friday, April 22, 2011 at 6:20pm by PsyDAG*

**calculus**

Use the linearization approximation (1+x)^k=1+kx to find an approximation for the function f(x)=(1/square root of 4+x) for values of x near zero.
*Sunday, March 2, 2008 at 9:39pm by Anonymous*

**calculus**

Use the linearization approximation (1+x)^k=1+kx to find an approximation for the function f(x)=(1/square root of 4+x) for values of x near zero.
*Tuesday, March 4, 2008 at 8:06pm by Anonymous*

**calculus**

Use the linear approximation (1+x)^k=1+kx to find an approximation for the function f(x)=1/square root of (4+x) for values of x near zero.
*Thursday, March 6, 2008 at 9:33pm by Anonymous*

**calculus**

Let f be a differentiable function such that f(3) = 2 and f'(3) = 5. If the tangent line to the graph of f at x = 3 is used to find an approximation to a zero of f, that approximation is? So confused
*Thursday, April 21, 2011 at 9:23pm by Matt*

**statistics**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. Convert to percentage. However, since this value is the mean, the mean = median = mode in a normal ...
*Sunday, May 6, 2012 at 4:31pm by PsyDAG*

**college statistics**

Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score. However, since mean = 28, and in a normal distribution, the mean = median, and the median = 50th ...
*Monday, June 11, 2012 at 4:44pm by PsyDAG*

**statistics**

A hypothesis related to the population proportion will be tested. In this case, Theoretical proportion, π0 = 1/6, number of observations, n = 60 Observed proportion, p = 9/n = 9/60 In the case where n>30, nπ0>5 and n(1-π0)>5, the normal distribution could be ...
*Sunday, October 4, 2009 at 11:13pm by MathMate*

**statistics**

Do you mean median or mean? Assuming a normal distribution, median = mean. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.
*Tuesday, November 22, 2011 at 2:15pm by PsyDAG*

**statistics**

1. Which of the following statements are correct? a. A normal distribution is any distribution that is not unusual. (True/False) b. The graph of a normal distribution is bell-shaped. (True/False) c. If a population has a normal distribution, the mean and the median are not ...
*Saturday, August 20, 2011 at 7:26pm by ann*

**Statistics**

Assuming a normal distribution: Z = (score-mean)/SEm SEm = SD/√n = 500/√100 = 500/10 = 50 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
*Thursday, June 20, 2013 at 5:36pm by PsyDAG*

**PH Calculation**

Consider a 0.42 M solution of NaCH3COO CH3COO–(aq) + H2O(l) -> CH3COOH(aq) + OH–(aq) Calculate the pH of the solution at equilibrium. Try the weak acid or weak base approximation (as appropriate) and check the validity of the approximation. If the approximation is not valid...
*Thursday, April 26, 2012 at 2:41am by RZeal*

**statistics**

A normal distribution has a standard deviation equal to 23. What is the mean of this normal distribution if the probability of scoring above x = 181? record to 1 decimal place
*Friday, June 21, 2013 at 1:14am by Paisley*

**Calculus**

Use the linear approximation (1+x)^k\approx 1+kx to find an approximation for the function f(x) for values of x near zero. I need help for (3+3x)^(1/3). Please help me!
*Thursday, October 3, 2013 at 8:50pm by Alex*

**Math**

Use the linear approximation (1+x)^k=1+kx to find an approximation for the function (3+3x)^(1/3) for values of x near zero. Help would be greatly appreciated!
*Thursday, October 3, 2013 at 9:21pm by Cory*

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