Tuesday

May 31, 2016
**Algebra 2/Statistics**

From a squad of 12 cheerleaders, 10 will assemble themselves into a 4-level pyramid at the Homecoming rally. 1.) How many different combinations of cheerleaders can be used to build the pyramid? For this I got 12C10=66......Right or Wrong? 2.) The coach decides that Alexis ...
*Thursday, April 30, 2015 by Jordan*

**Algebra 2/statistics**

On a fair 6-sided die, each number has an equal probability p of being rolled. when a fair die is rolled n times, the most likely outcome (the mean) is that each number will be rolled NP times, with a standard deviation of sqrt NP(1-P). Brandon rolls a die 200 times. He will ...
*Thursday, April 30, 2015 by Jordan*

**statistics HELP**

A student asks if it is possible to have a standard deviation of -5. How do you respond?
*Wednesday, April 29, 2015 by Enis*

**Statistics PLEASE HELP**

A flashlight has 8 batteries, 2 of which are defective. If you select 2 batteries, find the probability that You select at least 1 good battery
*Monday, April 27, 2015 by Kalee*

**Statistics**

A multiple choice test has 24 questions each having 4 possible answers. If you guess each answer, find the probability of getting Between 9 and 15 correct
*Monday, April 27, 2015 by Kalee*

**Statistics**

A flashlight has 8 batteries, 2 of which are defective. If you select 2 batteries, find the probability that You select at least 1 good battery
*Sunday, April 26, 2015 by Kalee*

**statistics**

If a pair of dice (one red; the other blue) are rolled, Find the probability of landing on at least one odd number
*Sunday, April 26, 2015 by Kalee*

**Statistics**

If a pair of dice (one red; the other blue) are rolled, Find the probability of landing on a sum of 9
*Saturday, April 25, 2015 by Kalee*

**STATISTICS**

IQ scores distribution of IQ scores is normally distributed standard with a mean of 100 and a standard deviation of 15, which is represented by a bell-shaped graphical. What is the area under the curve? What is the median? What is the mode?
*Saturday, April 25, 2015 by norma*

**statistics**

IQ scores distribution of IQ scores is normally distributed standard with a mean of 100 and a standard deviation of 15, which is represented by a bell-shaped graphical. What is the area under the curve? What is the median? What is the mode?
*Saturday, April 25, 2015 by norma*

**statistics**

IQ scores distribution of IQ scores is not normally distributed standard with a mean of 100 and a standard deviation of 15, which is represented by a bell-shaped graphical. What is the area under the curve? What is the median? What is the mode?
*Saturday, April 25, 2015 by norma*

**statistics**

assume that the odor threshold for untrained noses is normal with a standard deviation of 7. the odor thresholds for these 10 noses are: 31, 31, 43, 36, 23, 34, 32, 30, 20 and 24. is there evidence that the mean threshold for untrained tasters is greater than 25 micrograms per...
*Friday, April 24, 2015 by Mary*

**statistics**

would the null hypothesis that the 2000 mean hourly earnings of all workers was $16 be rejected at the 10% significance level in favor of the two-sided alternative? What about the null hypothesis that the mean was $15?
*Friday, April 24, 2015 by Mary*

**Psychology**

HELP !!! Which statistics concept is described? Choose from these answers: [(A):statistical test] [(B):Null Hypothesis] [(C):alpha] [(D):one-tailed test] [(E):two-tailed test] [(F):Type I error] [(G):Type II error] [(H):the statistic Z] 1)When a hypothesis is that two groups ...
*Friday, April 24, 2015 by Anonymous*

**Math, Statistics**

Find two z-scores so that 40% of the data in the distribution lies between them. (More than one answer is possible). Include a sketch of the distribution with 40% of the area shaded and the corresponding z-scores included. I'm not sure how to do this problem. Just need a ...
*Friday, April 24, 2015 by Lita*

**MATH**

HELP !!! Which statistics concept is described? Choose from these answers: [(A):statistical test] [(B):Null Hypothesis] [(C):alpha] [(D):one-tailed test] [(E):two-tailed test] [(F):Type I error] [(G):Type II error] [(H):the statistic Z] 1)When a hypothesis is that two groups ...
*Friday, April 24, 2015 by Anonymous*

**statistics**

For a given set of data, it is known that x = 10 and y = 4. The gradient of the regression line y on x is 0.6. Find the equation of the regression line and use it to estimate y when x = 8.
*Friday, April 24, 2015 by ednah*

**Statistics **

What is the test scores of 4, X, 1, 2 and 5 have a mean of 10. What is the value 4 1 2 :10 15
*Thursday, April 23, 2015 by Bee*

**Statistics**

I have been working on the following homework problem: Consider Homer and Bart's consumption of potato chips and donuts. Suppose that Marge is in the room 30% of the time that Bart is eating chips and 40% of the time that Bart is eating donuts. Similarly, suppose that ...
*Thursday, April 23, 2015 by W*

**statistics**

if alpha increases will beta increase or decrease? or are they not related?
*Thursday, April 23, 2015 by Anonymous*

**statistics**

Airline overbooking is a common practice. Many people make reservations on several flights due to uncertain plans and then cancel at the last minute or simply fail to show up. Jet Green airlines’ planes hold 100 passengers. Past records indicate that 20% of the people ...
*Thursday, April 23, 2015 by carlos*

**Calculating and Reporting Healthcare Statistics**

How do you: Calculate the total inches of documents filed per day for all clerks. Calculate the total documents filed per day for all clerks. Calculate the weekly total inches of documents filed per clerk (round to two decimal points). Calculate the weekly total documents ...
*Thursday, April 23, 2015 by Kat*

**Statistics**

The TreeDropped Fruit Company wants to sell its apples in pink and yellow gift boxes. To design the boxes, the company needs to estimate the average diameter of their apples. A random sample of 50 apples has a mean of 4.1 inches. Using previous research you assume a population...
*Thursday, April 23, 2015 by Jenny*

**Statistics**

In a sample of 200 people, 154 said they watched educational television. Find the 90% confidence interval of the true proportion of people who watch educational television. If the television company wanted to publicize the proportion of viewers, do you think it should use the...
*Wednesday, April 22, 2015 by Ale*

**Statistics**

An automatic machine in a manufacturing process is operating properly if the length of an important subcomponent is normally distributed with a mean μ = 80 cm and a standard deviation σ = 2 cm. a) Find the probability that the length of one randomly selected unit is ...
*Wednesday, April 22, 2015 by Lia*

**Statistics**

A simple random sample is conducted of 1486 young adults who were once college students seeking bachelor’s degrees at a specific university. The study found that 780 of these young adults actually earned bachelor’s degrees. Use a 0.05 significance level to test the ...
*Wednesday, April 22, 2015 by Giselle*

**Statistics**

A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 20 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of 235.29. Assume the data is normally distributed. Find ...
*Wednesday, April 22, 2015 by Giselle*

**Statistics**

A modification is made to a computer component to try to increase its mean time between failures, which was originally 520 hours. Tests on a simple random sample of 10 modified components resulted in the following times (in hours) between failures. Assume that the sample comes...
*Wednesday, April 22, 2015 by Giselle*

**Statistics **

The daily sales of a retail store are normally distributed with a standard deviation of $500. If the probability that sales will be less than $10,000 in any one day is 40%, what are the mean daily sales?
*Wednesday, April 22, 2015 by Anonymous*

**Statistics **

What is the lowest z-value for the highest 2% of observations on the standard normal distribution?
*Wednesday, April 22, 2015 by Anonymous*

**Statistics **

What is the lowest z-value for the highest 2% of observations on the standard normal distribution?
*Wednesday, April 22, 2015 by Alisha*

**Statistics **

A manufacturer makes ball bearings that are supposed to have a mean weight of 30g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.8 g with a standard deviation of 3.9 g At the 0.05 significance...
*Wednesday, April 22, 2015 by Leslie667*

**Statistics**

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44
*Wednesday, April 22, 2015 by Leslie667*

**Statistics **

Find the minimum sample size needed to estimate the population proportion if the margin of error is 0.07 confidence level is 95% and from a prior study p hat is estimated by decimal equivalent of 94% A) 39 b)45 c)43 d)44
*Tuesday, April 21, 2015 by Leslie667*

**Genetics**

A researcher who has pioneered cell-free fetal DNA testing to detect trisomies has received threats from people accusing her of killing babies. she counter that the test will actually saves lives. explain how the test can do this the accuracy statistics on cell-free fetal DNA ...
*Tuesday, April 21, 2015 by Shala*

**Business Statistics**

FORMAT INSTRUCTIONS Each question requires the use of MINITAB to solve. Please submit your work as a WORD or similar document. You can prepare this by cutting and pasting the results generated in MINITAB to such a document. Then you can edit that file with any required ...
*Monday, April 20, 2015 by Amer*

**Business Statistics**

FORMAT INSTRUCTIONS Each question requires the use of MINITAB to solve. Please submit your work as a WORD or similar document. You can prepare this by cutting and pasting the results generated in MINITAB to such a document. Then you can edit that file with any required ...
*Monday, April 20, 2015 by Amer*

**Stats**

Instructions for the Experiment / Data Collection regarding questions 1-4: Collect data regarding the caffeine content in a 16oz cup of coffee. Collect the amount of caffeine in 20 different brands of coffee. 1.Calculate the following descriptive statistics corresponding to ...
*Sunday, April 19, 2015 by Nisa (Please Help me)*

**Statistics**

Suppose a random family of four is selected (two parents and two children). Suppose further that you are told one of the two children is a girl. Given that this family has at least one daughter, what is the conditional probability that it also has a son? (HINT: write out the ...
*Sunday, April 19, 2015 by Gary*

**Elementary Statistics**

10. In a game of “chuck a luck” three dice are rolled. If your number comes up on all three dice you win $3. If your number comes up on two dice you win $2. If your number comes up only once you win $1. If your number doesn’t come up at all you lose $1. a) What ...
*Sunday, April 19, 2015 by Gary*

**statistics**

Find the Z-score that separate the middle 63% of the distribution from the area in the tails of the standard normal distribution
*Sunday, April 19, 2015 by sue*

**Statistics**

For the data set (−2,−3)(1,3)(5,4)(9,7)(11,12) find interval estimates (at a 94.6% level) for a single observation and for the mean response of y corresponding to x=1. Note: For each part below, your answer should use interval notation. Prediction Interval ...
*Sunday, April 19, 2015 by STATISTICS*

**statistics**

there are 500 passenger with a mean age of 60 years and a standard deviation of 12. what is the minimum age of the oldest 20%?
*Sunday, April 19, 2015 by Busisiwe*

**statistics**

A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis? A. Greater than or equal to .010 B. Greater than or equal to 0.05 C. Less than or equal to 0.10 D. Less than or equal to 0.05 Is it C?
*Saturday, April 18, 2015 by jay*

**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. Determine the conclusion of the hypothesis test assuming that the results of the sampling lead to rejection of the null hypothesis. A. ...
*Saturday, April 18, 2015 by MARY*

**statistics**

A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is reasonable. Estimate the minimum sample size ...
*Saturday, April 18, 2015 by MARY*

**statistics**

The data set represents the income levels of the members of a country club. Estimate the probability that a randomly selected member earns at least $98,000. 112,000 126,000 90,000 133,000 94,000 112,000 98,000 82,000 147,000 182,000 86,000 105,000 140,000 94,000 126,000 119,...
*Saturday, April 18, 2015 by HELP*

**statistics**

If you flip a coin three times, the possible outcomes are HHH, HHT, HTH, HTT, THH, THT, TTH, TTT. What is the probability of getting at least two tails? A. 1/2 B. 2/3 C. 3/4 D. 4/9 mY ANSWER IS A
*Saturday, April 18, 2015 by SUE*

**statistics**

Joe dealt 20 cards from a standard 52-card deck, and the number of red cards exceeded the number of black cards by 8. He reshuffled the cards and dealt 30 cards. This time, the number of red cards exceeded the number of black cards by 10. Determine which deal is closer to the ...
*Saturday, April 18, 2015 by phia*

**statistics**

Of the 6796 students in one school district, 1537 cannot read up to grade level. Among a sample of 812 of the students from this school district, 211 cannot read up to grade level. Find the sample proportion of students who cannot read up to grade level. A. 0.14 B. 0.26 C. 211...
*Friday, April 17, 2015 by Jane*

**statistics**

Jody checked the temperature 12 times on Monday, and the last digit of the temperature was odd six times more than it was even. On Tuesday, she checked it 18 times and the last digit was odd eight times more than it was even. Determine which series is closer to the 50/50 ratio...
*Friday, April 17, 2015 by HELP*

**statistics**

The distribution of B.A. degrees conferred by a local college is listed below, by major. Major Frequency English 2073 Mathematics 2164 Chemistry 318 Physics 856 Liberal Arts 1358 Business 1676 Engineering 868 9313 What is the probability that a randomly selected degree is not ...
*Thursday, April 16, 2015 by Bob*

**statistics**

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were more weeds in one ...
*Thursday, April 16, 2015 by leah*

**statistics**

A study of the amount of time it takes a mechanic to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 8.4 hours and the standard deviation is 1.77 hours. Assume that a random sample of 40 mechanics is selected and the mean rebuild time of the ...
*Thursday, April 16, 2015 by phia*

**Statistics **

The melting point of gold is known to be approximately 1,060 degrees centigrade. This is, of course, an average figure, for unavoidable ‘experimental error’ causes more or less variation from this figure whenever the test is actually performed. The best measure of ...
*Thursday, April 16, 2015 by JT*

**statistics**

A new national survey found that Americans drink an average of 6 glasses of water daily, instead of the recommended 8. Assuming that the number of glasses of water is approximately normally distributed with a standard deviation of 1.7 glasses, what proportion of Americans ...
*Thursday, April 16, 2015 by MJ*

**Statistics **

Can you explain why the scatter plot shows a negative Z value when the Histogram starts at zero.
*Wednesday, April 15, 2015 by Scatter graph question*

**writting skills**

1. Which one of the following comes first in an online catalog entry? A. Title of the book B. Year of publication C. Call number of the book D. Author's last name Student Answer: B Answer: Incorrect Reference: 2. You've located three books on a topic you're ...
*Wednesday, April 15, 2015 by TYondra*

**statistics**

A group of seven mountain climbers wishes to form a mountain climbing team of five.how many different teams could be formed?
*Wednesday, April 15, 2015 by kgahliso*

**statistics**

A tennis player makes a successful first serve 51% of the time. if she serves 9 times, what is the probability that she gets exactly 3 first serves in? assume that each serve is independent of the others.
*Wednesday, April 15, 2015 by Anonymous*

**statistics**

EXERCISE: POSSIBLE VALUES OF THE ESTIMATES Suppose that the random variable È takes values in the interval [0,1]. a) Is it true that the LMS estimator is guaranteed to take values only in the interval [0,1]? b) Is it true that the LLMS estimator is guaranteed to take ...
*Tuesday, April 14, 2015 by alec*

**statistics**

Suppose that fÈ and fX|È are described by simple closed-form formulas. Suppose that È is one-dimensional but X is high-dimensional. a) Suppose that a specific value x of the random variable X has been observed. Is it true that the calculation of the LMS ...
*Tuesday, April 14, 2015 by alec*

**Statistics**

Sammy and Sally each carry a bag containing a banana, a chocolate bar, and a licorice stick. Simultaneously, they take out a single food item and consume it. The possible pairs of food items that Sally and Sammy consumed are as follows. chocolate bar - chocolate bar licorice ...
*Monday, April 13, 2015 by Scott*

**Statistics**

A variable is normally distributed with mean 68 and standard deviation 10. Find: a) The value that 85% of all possible values of the variable exceed. b) The two values that divide the area under the corresponding normal curve into a middle area of 0.90 and two outside areas of...
*Monday, April 13, 2015 by Janet*

**Statistics**

The distribution of weekly salaries at a large company is reverse J-shaped with a mean of $1000 and a standard deviation of $370. What is the probability that the sampling error made in estimating the mean weekly salary for all employees of the company by the mean of a random ...
*Monday, April 13, 2015 by Janet*

**math**

A statistics student had excluded three outlier values when constructing a histogram of a frequency distribution. His teacher directed him to remake the histogram and include the outliers. Which of the following must be true? 1The shape of the histogram changes. 2The ...
*Monday, April 13, 2015 by heem*

**Math: statistics**

A DVD rental store wants to know what proportion of its customers are under age 21. A simple random sample of 500 customers was taken, and 375 of them were under age 21. Presume that the true population proportion of customers under age 21 is 0.68. Find the mean and standard ...
*Sunday, April 12, 2015 by Statistics*

**Statistics **

I'm stuck on this homework question. If someone can just help get me started with the first one I'm sure I can do the rest. I'm just not sure how to begin. Thanks! 1. A production process produces 90% non-defective parts. A sample of 10 parts from the production ...
*Sunday, April 12, 2015 by Emily*

**statistics**

Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total calcium level below 6 mg/dl. Recently, the patient's total calcium tests gave the following readings (in mg/dl). Assume ...
*Saturday, April 11, 2015 by Interval Estimate*

**Statistics**

A school psychologist decided to separate some classes by gender to see if learning improved. She looked at studded scores on the final exam and obtained the following information: Students in boy-girl classrooms obtained an average of 71.4 on their final exams with a standard...
*Saturday, April 11, 2015 by Anonymous*

**statistics**

The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9260 ...
*Saturday, April 11, 2015 by Interval Estimate*

**Statistics**

The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1320 1201 1257 1180 1268 1316 1275 1317 1275 (a) Use a calculator with mean and standard ...
*Saturday, April 11, 2015 by Interval Estimate*

**statistics**

Which data provide the answer to the question: “How frequently can a student at Eureka College be expected to study more than three hours a day?” A. Of 100 students surveyed, 43 reported that they study at least three hours a day twice a week. B. Of 100 students ...
*Friday, April 10, 2015 by phia*

**statistics**

A poll of 700 persons attending the Taste of Chicago showed that 455 persons, 65% of the sample, believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste. Statistics suggest that, although 65% plus or minus 5% of attendees believe that the...
*Friday, April 10, 2015 by phia*

**social studies**

A poll of 700 persons attending the Taste of Chicago showed that 455 persons, 65% of the sample, believed that the food was overpriced. It is estimated that 1,250,000 persons attend the Taste. Statistics suggest that, although 65% plus or minus 5% of attendees believe that the...
*Friday, April 10, 2015 by phia*

**statistics**

A U.S. government report stated that, “With bank interest rates around 1.0%, 8% of wage earners believe it worthwhile to keep money in a savings account. However, at 3.0% interest, 36% of wage earners believe it worthwhile to keep money in a savings account. The margin of...
*Friday, April 10, 2015 by phia*

**statistics**

A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly assigns half of a group of overweight persons to a treatment group who are given the herb with instructions for its use and a planned diet for six weeks. The ...
*Friday, April 10, 2015 by phia*

**english**

About 200 years ago the Cherokee Indians were one tribe, or "Indian Nation" that lived in the southeast part of what is now the United States. During the 1830's and 1840's, the period covered by the Indian Removal Act, (1) many Cherokees were moved west to a...
*Thursday, April 9, 2015 by jimm*

**Statistics**

A Today/CNN/Gallup Poll of 1015 adults found that 13% approved of the job Congress was doing in 1995. Find the 95% confidence interval of the true proportion of adults who feel this way.
*Wednesday, April 8, 2015 by CJ*

**statistics**

last year houston hospital averaged 98 births a month with a standard deviation of 6 january reported 107 birhts. how does the number of birhts in january compare to the average
*Wednesday, April 8, 2015 by bria*

**statistics**

Suppose that your studying tine is unifornily distribution between 4 pm and 10pm what is the probability that will study afterb8 pm
*Wednesday, April 8, 2015 by sue spear*

**statistics**

The average number of houses sold by a company is 2 houses per day what is probability that's exactly 3 houses will be sold in one week
*Wednesday, April 8, 2015 by sue spear*

**business statistics**

pkg1 pkg2 215 148 89 70 367 292 find the relative frequency of occurrence approach to determine the probability that a tube of toothpaste sold had packaging style 1
*Monday, April 6, 2015 by charissa*

**Writing Skills, Part 3**

6. You have found an article in the Readers' Guide that you want to locate. What information would be least important in finding it? A. Subject heading B. Volume and page numbers C. Author's name D. Title of the article Student Answer: B Answer: Incorrect Reference: 7...
*Sunday, April 5, 2015 by yes help me I'm an idiot*

**Statistics**

Find the margin of error for a 95% confidence interval for estimating the population mean when the sample standard deviation equals 100, with a sample size of (i) 400, (ii) 1600. What is the effect of the sample size? (b) Find the margin of error for estimating the population ...
*Sunday, April 5, 2015 by courtney*

**statistics**

A test consist of 10 multiple choice questions, each with five possible answers, one of which is correct. To past the test a student must get 60% or better
*Saturday, April 4, 2015 by pat*

**Statistics**

Find the margin of error for a 95% confidence interval for estimating the population mean when the sample standard deviation equals 100, with a sample size of (i) 400, (ii) 1600. What is the effect of the sample size? (b) Find the margin of error for estimating the population...
*Saturday, April 4, 2015 by Courtney R*

**Statistics**

If the average home cost $100,000, with a standard deviation of $15,000, what would a home on the 20th percentile rank cost?
*Friday, April 3, 2015 by Jan*

**Statistics **

A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. = 25.7 years. The population variance is 12. (a) Give a point estimate for mu. (b) Find the 95% confidence interval for mu (lower and upper limit). (c) Find ...
*Thursday, April 2, 2015 by Megan*

**Statistics **

By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 6 seconds. (a) How many measurements should be made to be 90% certain that the maximum error of estimation will...
*Thursday, April 2, 2015 by Megan*

**Statistics**

How large a sample should be taken if the population mean is to be estimated with 90% confidence to within $75? The population has a standard deviation of $892. So far I have n= (.2)(5)^2, but I don't think that's right....
*Thursday, April 2, 2015 by Megan*

**statistics**

Let X and Y be independent random variables, each uniformly distributed on the interval [0,1]. Let Z=max{X,Y}. Find the PDF of Z. Express your answer in terms of z using standard notation . For 0<z<1, fZ(z)= 1 - unanswered 1 Let Z=max{2X,Y}. Find the PDF of Z. Express ...
*Wednesday, April 1, 2015 by alec*

**statistics**

A brewery's filling machine is adjusted to fill bottles with a mean of 31.9 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability that the next ...
*Tuesday, March 31, 2015 by Anonymous*

**statistics**

What is the difference between alpha level and critical values?? Does the alpha level just help determine the critical value?
*Tuesday, March 31, 2015 by Anonymous*

**statistics **

If the null hypothesis is rejected at the .01 alpha level, it will be rejected at the .05 alpha level. Is this correct?
*Tuesday, March 31, 2015 by Anonymous*

**Statistics**

In the past year, Jack's Pizaa Resturant grossed more than $1500 a day for about 83% of its business days. Suppose 8 days are randomly selected, approximate the probablity that exactly 6 days will gross more than $1500 in a day.
*Tuesday, March 31, 2015 by Kim*

**Math, statistics**

Problem 1: The PDF of exp(X) (6/6 points) Let X be a random variable with PDF fX. Find the PDF of the random variable Y=eX for each of the following cases: For general fX, when y>0, fY(y)= Solution: f_x(ln(y))/y When fX(x) = {1/3,0,if −2<x≤1,otherwise, we ...
*Tuesday, March 31, 2015 by R*

**statistics**

1. Suppose the estimate of a proportion of a normal population is to be within 0.05 using the 95% confidence level. How large a sample is required if: a. It is known from previous studies that p = 0.3? b. There is no prior knowledge of p? 2. Each of the following is a large-...
*Tuesday, March 31, 2015 by Micheal*

**Statistics**

It is pretty common across most schools to find the grades at the MBA level divided between A's and B's. As such, you expect the mean GPA to be around 3.50. Using the sample of 200 MBA students, conduct a one-sample hypothesis test to determine if the mean GPA is ...
*Tuesday, March 31, 2015 by Leticia*

**Statistics**

1 39 63 wind speed (km h ) –1 Measurements of wind speed on a certain island were taken over a period of one year. A box-andwhisker plot of the data obtained is displayed above, and the values of the quartiles are as shown. It is suggested that wind speed can be modelled ...
*Monday, March 30, 2015 by Osa*