MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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A restaurant finds that their expense per customer has a distribution that is right skewed with μ = $8.20 and s = $3.00. You take a SRS of 20 customers and find a sample
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- Suppose you are interested in knowing the proportion of Texas A&M students who have their own subscription to Netflix. Everyone in a class of 77 students takes a random sample of 100 Texas A&M students and asks them if they have their own Netflix subscription. Each person calculates the proportion of their sample with a subscription and we make a histogram of the 77 proportions. What kind of distribution would be displayed in that histogram? a. Population Distribution b. Sampling Distribution c. Data Distribution d. Parent Distribution e. More than one of the abovearrow_forwardFor a population with an unknown distribution, the form of the sampling distribution of the sample mean is what?arrow_forwardOn the first day of class, a statistics professor asked her students to report their grade point averages (GPAs) as part of a class survey. For those students who knew their GPAs, the histogram was: The distribution is:arrow_forward
- What is the shape of the sampling distribution?arrow_forwardWhat is the t statistic for the top 3% for a sample size of 19.arrow_forwardSuppose that insurance companies did a survey. They randomly surveyed 400 drivers and found that 310 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up. Which distribution should you use for this problem? (Round your answer to four decimal places.)arrow_forward
- Recent studies have shown that about 16% of American adults fit the medical definition of being obese. A large medical clinic would like to estimate what percentage of their patients are obese, so they take a random sample of 400 patients and find that 52 are obese. Suppose that in truth, the same percentage holds for the patients of the medical clinic as for the general population, 16%. Find the mean of the sampling distribution of p̂.arrow_forwardSuppose the true population proportion is p = 0.5. The figure below shows the distribution of the sample proportion (p) values for 3 different sample sizes, n = 20, n=100 and n=500. 0.2 0.4 0.6 0.8 0.2 0.4 0.6 0.8 0.2 0.4 0.6 0.8arrow_forwardSuppose the percentage of married couples who own a home is 33% for a given population. What is the standard error of the sampling distribution of proportions for the sample sizes n = 200, n = 300, and n = 400?arrow_forward
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