Saturday

May 30, 2015

May 30, 2015

**statistics**

The average age of doctors in certain hospital is 43 years old. Suppose distribution of ages is normal and the standard deviation is 8.0 years. If 25 doctors is chosen at random for a committee, find the probability the average age for those doctors is less than 43.8 years. ...
*Wednesday, March 11, 2015 at 8:39pm*

**statistics**

A casting director wishes to find one male and one female to cast is his play. If he plans to audition 5 males and 7 females, in how many different ways can this be done? DO NOT put a comma in your response.
*Wednesday, March 11, 2015 at 8:18pm*

**Statistics**

Shopping Outlet A shopping outlet estimates the probability distribution of the number of stores shoppers actually enter as shown in the table below. x 0 1 2 3 4 p(x) 0.05 0.35 0.25 0.20 0.15 What is the probability that shoppers are just window shopping and not entering any ...
*Wednesday, March 11, 2015 at 1:25am*

**Statistics**

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the requested probabilities. More than a decade ago, high levels of lead in the blood put 87% of children at risk. A concerted ...
*Tuesday, March 10, 2015 at 10:43pm*

**Elementary Statistics **

"Scores on the Wechsler IQ test approximate a normal curve with a mean of 100 and a standard deviation of 15. b. What percentage of IQ scores are below 74?" I've been working at this for a while now, but when I solve for the z-score, I keep getting a negative ...
*Tuesday, March 10, 2015 at 10:33pm*

**statistics **

Z-test. How to find critical value for one tail test?
*Tuesday, March 10, 2015 at 8:07pm*

**statistics - can someone please Help me**

I have tried for days to figure out how to work this problem. Please help show me how to find the answer. A particular radioactive isotope decays from 210 mg to 182.7 mg in 15 days. Find the half life of the isotope. I can not find any problem that is similar. everything i ...
*Tuesday, March 10, 2015 at 8:04pm*

**statistics **

How to find p value? If test statistic is -0.37, will the p value be 0.3557?
*Tuesday, March 10, 2015 at 7:15pm*

**statistics**

I have tried for days to figure out how to work this problem. Please help show me how to find the answer. A particular radioactive isotope decays from 210 mg to 182.7 mg in 15 days. Find the half life of the isotope.
*Tuesday, March 10, 2015 at 3:30pm*

**statistics**

A jar contains 3 nickels and 2 dimes. You reach in and randomly select 2 coins. Let x represent the value of the two coins in cents. Find the expected value and standard deviation of x
*Tuesday, March 10, 2015 at 2:13pm*

**statistics**

Determine whether the description corresponds to an observational study or an experiment. Research is conducted to determine if there is a relation between kidney function in adults and childhood-onset diabetes.
*Tuesday, March 10, 2015 at 10:44am*

**statistics**

Based on a study of IQs of men and women who play chess competitively, a researcher concludes that playing chess causes people to become smarter. Do you agree with this conclusion?
*Tuesday, March 10, 2015 at 10:25am*

**Statistics**

A history class is comprised of 5 female and 8 male students. If the instructor of the class randomly chooses 8 students from the class for an oral exam, what is the probability that 2 female students and 6 male students will be selected? Round your answer to decimal places.
*Tuesday, March 10, 2015 at 8:57am*

**problem and statistics**

In a random sample of 10 on-line statistics students, information was collected about their minutes studied and their chapter test scores. X is the minutes studied, and Y is the test score. x : {20,30,45,60,80,90,45,120,90,70} y: {50,45,55,70,80,90,80,100,95,85} Is this ...
*Monday, March 9, 2015 at 1:37pm*

**statistics**

An online site presented this question, 'Would the recent norovirus outbreak deter you from taking a cruise?' Among 34,327 people who responded, 66% answered 'yes'. Use the sample data to construct a 95% confidence interval estimate for the proportion of the ...
*Monday, March 9, 2015 at 5:13am*

**Statistics**

In the week before and the week after a holiday, there were 12,000 total deaths, and 5916 of them occurred in the week before the holiday. a. Construct a 95% confidence interval estimate of the proportion of deaths in the week before the holiday to the total deaths in the week...
*Monday, March 9, 2015 at 4:56am*

**Healthcare Statistics**

As a data collection specialist at the National Institutes of Health (NIH), you have been involved in a research study conducted over the past year. The study found that liver cancer rates per 100,000 males among cigarette smokers to nonsnmokers, in a major urban U.S. city, ...
*Sunday, March 8, 2015 at 11:08pm*

**Statistics**

What does p-hat mean
*Sunday, March 8, 2015 at 4:12am*

** Statistics**

If a mother has three bananas, two pears, and two oranges, in how many different ways can she give the fruit to her daughter in one week, one piece of fruit per day?
*Saturday, March 7, 2015 at 8:50pm*

**statistics**

In the population, the average IQ is μ = 100 with a standard deviation of σ = 15. A team of scientists wants to test a new medication to see if it has a positive effect on intelligence. A sample of n = 10 participants who have taken the medication has a mean of M = ...
*Saturday, March 7, 2015 at 8:48pm*

**statistics**

I need help, I am trying to figure out the critical value of my homework and I am having a great deal of trouble. if z= 1.69 p = .0455 What is the critical value(s) , is/are z =?
*Saturday, March 7, 2015 at 8:37pm*

**statistics**

The mean cost of domestic airfares in the United states rose to an all-time high of $385 per ticket
*Saturday, March 7, 2015 at 3:26pm*

**Business Statistics**

The following tables shows the hourly wages of all workers in a certain hospital. Determine the pearsonian coefficient of skewness (population data). Hourly wages frequency 90-99 5 100-109 9 110-119 5 120-129 7 130-139 5 140-149 3 My answers: mean = 116.56 s = 15.72 But i dont...
*Saturday, March 7, 2015 at 4:15am*

**statistics**

A coin mint has a specification that a particular coin has a mean weight of 2.5 g. A sample of 39 coins was collected. Those coins have a mean weight of 2.49491 g and a standard deviation of 0.01372 g. Use a 0.05 significance level to test the claim that this sample is from a ...
*Saturday, March 7, 2015 at 4:03am*

**statistics**

Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is 0.876 and the regression line is y-hat = 11,76 + 0.89x, where x represents the IQ score of the twin born second. Also,the 20x values have a mean of ...
*Saturday, March 7, 2015 at 3:31am*

**math/statistics**

The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation,letting the first variable be the independent (x) variable. Find the best predicated time of the interval after an eruption given that the current ...
*Friday, March 6, 2015 at 8:14pm*

**Statistics**

Identify the type I error and type II error that corresponds to the given hypothesis. The proportion of settled medical malpractice suits is 0.28 I have been working on this one for 3 hours and am doing something wrong, Please help!!
*Friday, March 6, 2015 at 7:37pm*

**statistics**

For an IQ test, we know the population mean = 100 and the standard deviation =16. We are interested in creating the sampling distribution when N = 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean of ...
*Friday, March 6, 2015 at 1:01pm*

**Statistics**

If bird flu mortality in one sample of 100 is 20% and in another sample of 100 it is 30%. Is the difference in mortality rate is significant? Solve for the statistic value of Z at probability alpha level of 0.05. Please show your solution.
*Friday, March 6, 2015 at 8:28am*

**statistics**

A survey found that women's heights are normally distributed with mean 62.4 in and standard deviation 2.8 in. The survey also found that men's heights are normally distributed with a mean of 68.9 in. and standard deviation 2.8. Complete parts a through c below. a. Most...
*Thursday, March 5, 2015 at 4:35am*

**Statistics/Probability**

A certain brand of candies have a mean weigh of 0.8576 g and a standard deviation of 0.0523. A sample of these candies came from a package containing 447 candies,and the package label stated the net weight is 381.3 g. (If every package has 447 candies, the mean weight of the ...
*Thursday, March 5, 2015 at 3:54am*

**Statistics/Probability**

Assume that women’s heights are normally distributed with a mean given by μ = 63.4 in, and a standard deviation given by σ = 2.3 in. (a) If 1 woman is randomly selected, find the probability that her height is less than 64 in. (b) If 43 women are randomly ...
*Wednesday, March 4, 2015 at 11:48pm*

**statistics/normal distribution**

Find the area of the shaded region.The graph to the right depicts IQ scores of Adults (85-120), and those scores are normally distributed with a mean of 100 and a standard deviation of 15
*Wednesday, March 4, 2015 at 7:45pm*

**Statistics Help**

Express the confidence interval (0.024, 0.112) in the form of p-hat – E < p < p-hat + E = __< p < __ I don't understand how to perform this formula. Please help I am about to graduate and this is my last class, and I am struggling as I only know basic Math...
*Wednesday, March 4, 2015 at 3:18pm*

**statistics/Help Please!!**

In a sample of seven cars, each car was tested for nitrogen-oxide emissions (in grams per mile) and the following results were obtained:0.18, 0.12, 0.05, 0.19, 0.18,0.13, 0.15. Assuming that this sample is representative of the cars in use, construct a 98% confidence interval ...
*Wednesday, March 4, 2015 at 1:10pm*

**statistics**

one bag contains 4 white balls,2 black balls.another bag contains 3 white balls 5 black balls.if one ball is drawn from each bag. find that a) both are white? b) both are black? c)one is white and one is black?
*Wednesday, March 4, 2015 at 12:53am*

**Statistics**

. Given that x is a normal variable with mean m=110 and standard divation (r=12, find P(x=≤120
*Wednesday, March 4, 2015 at 12:12am*

**Statistics**

A random sample of state gasoline taxes is shown for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does your interval contain the national average of 0.21? assume normal distribution.
*Tuesday, March 3, 2015 at 12:08pm*

**Statistics **

find the probability that you will get a "sum" of 5 or greater in rolling two dice experiment. How do you do this?
*Tuesday, March 3, 2015 at 10:29am*

**businessmath**

Statistics show that the sales force of a certain company successfully closed 986 sales out of 1,700 sales calls. What was their percent success rate? If needed, enter decimals rather than fractions. Do not enter the percent symbol in your answer.i need the answer now
*Tuesday, March 3, 2015 at 9:51am*

**Statistics**

so we will be having a quiz about hypotheses testing and i cant still figure out the difference between the null hypothesis with alternative hypothesis. PLEASE HELP ME DIFFERENTIATE THE TWO. And i still get confused between one tailed test and two tailed test.. what's the ...
*Tuesday, March 3, 2015 at 8:11am*

**Statistics**

what is the cost of a dinner when there is a 0 rating when y hat=1.6+2.9x
*Monday, March 2, 2015 at 5:41pm*

**Statistics**

How does the standard deviation differ to of the sample mean x bar. Please help I'm confused
*Monday, March 2, 2015 at 8:44am*

**statistics**

The life spans of three randomly selected tires are 28,100 miles, 37,900 miles, and 33,000 miles. Using the empirical rule, find the percentile that corresponds to each life span.
*Sunday, March 1, 2015 at 5:55pm*

**statistics**

Fewer young people are driving. In 1983, 87 percent of 19 year-olds had a driver's license. Twenty-five years later that percentage had dropped to 75 percent (University of Michigan Transportation Research Institute website, April 7, 2012). Suppose these results are based ...
*Sunday, March 1, 2015 at 5:41pm*

**statistics**

In a test of the effectiveness of garlic for lowering cholesterol, 44 subjects were treated with garic in a processed tablet form. Cholesorol levels were measured before and after the treament. the changes in their levels of LDL cholestorol (in mg/dL have a mean of 3.5 and a ...
*Sunday, March 1, 2015 at 10:09am*

**Statistics/check answer**

If a population has a standard deviation σ of 18.2 units, what is the standard error of the mean if samples of size 25 are selected? Show all work. standard error of the mean = 0/sqrt(n) = 18.2/sqrt(25) = 18.2/5 =3.64 Answer 3.64
*Sunday, March 1, 2015 at 5:59am*

**statistics**

Suppose for the same 3000 women, we also measured their weight. Suppose the data were again normally distributed. The average weight is 143 lbs., and the standard deviation is 30 lbs. Suppose the correlation between height and weight is r = +.69. What is the slope of the best-...
*Sunday, March 1, 2015 at 3:03am*

**Statistics**

Suppose that the distance of fly balls hit to the outfield (in baseball)is normally distributed with a mean of 250 feet and a standard deviation of50 feet. a. If X = distance in feet for a fly ball, then X ~ _____(_____,_____) b. If one fly ball is randomly chosen from this ...
*Sunday, March 1, 2015 at 1:54am*

**Statistics**

How many different 9 letter code words can be made using the symbols %%%% &&& ++
*Sunday, March 1, 2015 at 12:29am*

**Statistics**

Science scores for high school seniors in the United States are normally distributed with a mean of 78 and a standard deviation of 10. Students scoring in the top 10% are eligible for a special prize consisting of a laptop and $2,000. What is the approximate cutoff score a ...
*Saturday, February 28, 2015 at 9:29pm*

**statistics**

how to summarize statistic assumption
*Saturday, February 28, 2015 at 12:56pm*

**statistics**

If weight in the general population is normally distributed with an average of 160 and a standard deviation of 20 pounds, what is the probability of selecting someone who weights 120 or less or 170 or more pounds?
*Friday, February 27, 2015 at 7:46pm*

**statistics**

Determine the level of the confidence given the confidence coefficient z(α/2) for the following situation: z(α/2) = 1.96
*Friday, February 27, 2015 at 7:35pm*

**Statistics **

With a known population mean of 100, and a known standard of error of the mean of 7.5, what is the probability of selecting at random a sample whose mean is equal to 110 or greater?
*Friday, February 27, 2015 at 6:53pm*

**statistics**

historically, the average customer spends $8.53 for all TGP restaurants(u=8.53). If the population standard deviation is $1.06(o=1.06) and the data is normally distributed, find the probabiltiy that the sample mean will be within $.15 of the populaiton mean using a sample size...
*Friday, February 27, 2015 at 6:40pm*

**statistics**

Assume that the regression equation for the relationship between SAT scores and IQ scores is y = 9 +.105x. What would you expect the IQ score to be for the following individuals, given their SAT scores? Individual SAT Score IQ Score Susan 850 Sally 1175 Sam 1225 Sean 1050
*Friday, February 27, 2015 at 6:31pm*

**Healthcare Statistics**

What is the mode of this data set 22 27 32 32 35 35 36 37 38 42 48 52 53 54 55 55 55 58 59 62 62 63 64 65 65 65 67 69 75 84 I see four modes: 32, 35, 55, and 65 Would this be considered multimodal?
*Friday, February 27, 2015 at 6:16pm*

**statistics**

For classes of 273 students, find the mean and standard deviation for the number born on the 4th of July, Ignore leap years. For a class or 273 students, would two be an unusually high number who were born on the 4th of July? I don't know how to find how many out of 273 ...
*Friday, February 27, 2015 at 4:13pm*

**statistics**

A headline in a certain newspaper states that "most stay at first job less than 2 years." That headline is based on an online poll of 320 college graduates. Among those polled, 72% stayed at their first full-time job less than 2 years. a. Assuming that 50% is the ...
*Friday, February 27, 2015 at 4:00pm*

**Statistics **

The results of a nationwide survey show that 57.40% of college students have violated rules of alcohol use. The margin of error for the survey is 2.30%. What does this mean?
*Friday, February 27, 2015 at 1:23pm*

**Statistics**

Among the population of criminal justice students, the average score on the final exam was 74, with a standard deviation of 11.6. What is the probability of randomly selecting a student who earned an A (90 or better)?
*Friday, February 27, 2015 at 1:21pm*

**Statistics **

1200 high school freshman were randomly selected for a national survey. Among survey participants, the mean grade-point average was 2.8, and standard deviation was 0.6. What is the margin of error, assuming a 95% confidence level?
*Friday, February 27, 2015 at 1:18pm*

**Statistics**

A criminologist is studying school violence, she selects a random sample of 25 adolescents aged 12 to 15 from a local middle school and asks the following,"How many times within the past school year have you been physically assaulted at school? She calculated the ...
*Friday, February 27, 2015 at 1:15pm*

**Statistics**

Suppose we would like to estimate the mean amount of money spent on books by students in the fall semester. We have the following data from 400 randomly selected students: mean=$205 and s=$40. Assume that the amount spent on books by students is normally distributed. Compute a...
*Friday, February 27, 2015 at 9:18am*

**Statistics**

Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (...
*Friday, February 27, 2015 at 2:12am*

**statistics**

Heights of men on a baseball team have a bell-shaped distribution with a mean of 169 cm and a standard deviation of 9 cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. 151 cm and 187 cm. b. 160 cm and 178 cm. Please ...
*Thursday, February 26, 2015 at 1:03pm*

**statistics**

In a course there is a midterm exam, worth 40% of the course grade, and a final exam worth 60%. On the midterm the mean grade was 80 with a standard deviation of 10, and on the final the mean was 75 with a standard deviation of 15. The correlation between the two exams is 0.6...
*Wednesday, February 25, 2015 at 11:20pm*

**STATISTICS**

a team of 3 is to be chosen from 4 boys and 5 girls. if X is the random variable of the number of girls in the team find the Expected variable X. E(X)
*Wednesday, February 25, 2015 at 3:40pm*

**statistics/normal distribution**

If np is greater than or equal to 5, and nq is greater than or equal to 5, estimate P(fewer than 8) with n =14 and p = 0.6 by using the normal distribution as an approximation to the binomial distribution; if np < 5 or nq < 5, then state that the normal approximation is ...
*Wednesday, February 25, 2015 at 3:01pm*

**Statistics**

What is the sample variance (not the population estimate) for: 1, 1, 2, 3, 5, 8.
*Tuesday, February 24, 2015 at 9:53pm*

**Statistics**

In a nominal data set, what is the preferred measure of central tendency?
*Tuesday, February 24, 2015 at 9:40pm*

**statistics**

I know I posted this earlier but I found the answer I just don't know the steps to find it. Use technology to find the probability associated with the cumulative area to the left of the z score of the adjusted value of x, 5.5. P(z < - 0.5546) = 0.2896 If you could just ...
*Tuesday, February 24, 2015 at 5:56pm*

**Statistics**

A vending machine pours an average of 8.0 oz of coffee with a standard deviation of 0.2 oz if it is functioning properly. An inspector wants to take 16 cups of coffee from the machine to see if the machine is functioning well or not. He wants to have a significance level of 4...
*Tuesday, February 24, 2015 at 5:15pm*

**statistics**

use technology to find the probability associated with the cumulative area to the left of the z score of the adjusted value of x, 5.5 P(z< - 0.5546) = Im not sure if I need to look a z score table or how to redo this formula. I know the steps except for this. Please help.
*Tuesday, February 24, 2015 at 4:55pm*

**Statistics and Probability**

I took a large sample of households in a city, and based on that, estimate the standard deviation of the income for all households in the city is $800. In order to make a desired conclusion about the income for all the households in the city, I want the sample mean for another...
*Tuesday, February 24, 2015 at 4:34pm*

**Statistics**

I took a large sample of households in a city, and based on that, estimate the standard deviation of the income for all households in the city is $800. In order to make a desired conclusion about the income for all the households in the city, I want the sample mean for another...
*Tuesday, February 24, 2015 at 3:56pm*

**statistics**

If np is more or equal to 5 and nq is more or equal to 5, estimate P(fewer than 6) with n = 14 and p = 0.5 by using the normal distribution as an approximation to the binomial distribution; if np < 5 or nq < 5, then state that the normal approximation is not suitable. ...
*Tuesday, February 24, 2015 at 4:35am*

**statistics**

A box contains 3 red marbles and 7 white marbles.A marble is drawn from the box,and a marble of the other color is then put into the box.A second marble is drawn from the box.Find the probability that the second marble is red.if both marbles were of same color.what is the ...
*Tuesday, February 24, 2015 at 3:25am*

**statistics**

A comprehensive study of orphaned children is conducted in every orphanage in Australia. A scale called the Capacity for Attachment Scale is given to all orphaned children. The mean (μ) of the scale is 72 and the standard deviation (σ) is 13. Assuming that the scores...
*Monday, February 23, 2015 at 7:05pm*

**statistics**

If a fowl is treated, probability of dying is 1/10 while if not treated the probability is 7/10 calculate the probability that, a fowl picked at random from the 36 fowl is (i) Treated with the drug and will die (ii) Not treated with the drug and will die (iii) Not treated with...
*Sunday, February 22, 2015 at 10:42pm*

**statistics**

The water supply in a town depends entirely on two pumps. A and B. The probability of pump A filling is 0.1 and the probability of pump B failing is 0.2. Calculate the probability that (a) Both pumps are working (b) There is no water in the town (c) Only one pump is working (d...
*Sunday, February 22, 2015 at 8:01pm*

**statistics**

About 71% of dog owners buy holiday presents for their dogs. Suppose n = 4 dog owners are randomly selected. Find the expected number of persons, in the sample, who buy their dog holiday presents. Round to four decimal places.
*Sunday, February 22, 2015 at 4:07pm*

**statistics**

A cell phone service provider has selected a random sample of 20 of its customers in an effort to estimate the mean number of minutes used per day. The results of the sample included a sample mean of 34.5 minutes and a sample standard deviation equal to 11.5 minutes. Based on ...
*Sunday, February 22, 2015 at 1:15pm*

**statistics**

Consider the following situation, and answer each of the following multiple choice questions. In your write-up, just list the sub-question letter (A-J) and your answer – no need to restate the question or to justify your answer. Situation: You have 400 data points, which ...
*Sunday, February 22, 2015 at 7:09am*

**statistics**

a hat contains 40 marbles, 16 of which are red and are green. if one marble is randomly selected out of this hat, what is the probability that this marble is red?
*Sunday, February 22, 2015 at 6:55am*

**statistics**

Factories A, B and C produce computers. Factory A produces 3 times as many computers as factory C, and factory B produces 6 times as many computers as factory C. The probability that a computer produced by factory A is defective is 0.02, the probability that a computer ...
*Sunday, February 22, 2015 at 1:43am*

**statistics**

A consumer advocacy group claims that the mean amount of juice in a 16 ounce bottled drink is not 16 ounces, as stated by the bottler.
*Saturday, February 21, 2015 at 8:05pm*

**Statistics**

A) Identify the question, population, and sample. b) Discuss any potential bias or lurking variables that may affect the results.? c) Write about the extent to which we can generalize the findings to all people who use cell phones. Stewart Fist reported the results of an ...
*Saturday, February 21, 2015 at 6:11pm*

**statistics**

A student government representative at a local university claims that 60% of all the undergraduate students favor a move to Division I in college football. A simple random sample of 250 undergraduate students is selected. What is the probability that the sample proportion ...
*Saturday, February 21, 2015 at 3:45pm*

**statistics**

Heights of women have a bell-shaped distribution with a mean of 158 cm and a standard deviation of 8 cm. Using Chebyshev’s theorem, what do we know about the percentage of Women with heights that are within 3 standard deviations of the mean. What are the minimum and ...
*Saturday, February 21, 2015 at 3:58am*

**govt**

what is the correct apa style that i would use in a biblography for the u.S. bureau of labor statistics (february 2012)
*Friday, February 20, 2015 at 9:01pm*

**Statistics**

A student guesses blindly on a 20-question multiple choice test. If each question has 4 answer choices (only one of which is correct), what is the probability that the student will answer exactly 10 questions correctly?
*Friday, February 20, 2015 at 8:11pm*

**statistics**

Determine the critical region and the critical values used to test the following null hypotheses: a. Ho: μ = 55 (≥), Ha: μ < 55, α = 0.02 b. Ho: μ = −86 (≥), Ha: μ < −86, α = 0.01 c. Ho: μ = 107, Ha: μ &#...
*Friday, February 20, 2015 at 2:53pm*

**Statistics**

Below are the numbers of games played in the World Series from 1903 to 2012. Find the mean, variance and standard deviation. Games played Probability 4 0.186 5 0.231 6 0.203 7 0.341 8 0.039
*Friday, February 20, 2015 at 1:25pm*

**Statistics**

For $5 you can buy a ticket for a drawing for a prize of $2,000. The probability of winning the prize is 0.001. How much money to you expect to win
*Friday, February 20, 2015 at 1:20pm*

**statistics**

A candy company claims that 13% of its plain candies are orange, and a sample of 100 such candies is randomly selected. Find the mean and the standard deviation for the number of orange candies in such groups of 100. I do not get the formula to figure this out Someone, please ...
*Friday, February 20, 2015 at 5:44am*

**statistics**

Let the random variable x represent the number of girls in a family with three children. Assume the probability of a child being a girl is 0.42. The table on the right describes the probability of having x number of girls. Determine whether the table describes a probability ...
*Friday, February 20, 2015 at 5:43am*

**statistics**

When drawing a histogram, it is important to a. eliminate the extremes to minimize the effect of skewness. b. choose class intervals, so they all have the same number of observations c. make sure that the mean and the median fall in the same class interval, so that the correct...
*Friday, February 20, 2015 at 4:36am*

**statistics**

A brand has 50% recognition rate. Assume the owner of the brand wants to verify that rate by beginning with a small sample of 6 randomly selected customers, what is the probability that exactly 5 of the selected consumers recognize the brand name? I need the correct formula in...
*Friday, February 20, 2015 at 2:55am*