The manager of the local Walmart Supercenter is studying the number of items purchased by customers in the evening hours. Listed below isthe number of items for a sample of 30 customers.912584667119814912541061810610115What is the mean number of items?What is the median number of items?What is the range of number of items?What is the standard deviation?About 95% of the number of items are between what two values? Lower limit1091312135Organize the number of items into a frequency distribution. What is the lower limit of the second class?What is the mean of the data organized into a frequency distribution?What is the standard deviation of the data organized into a frequency distribution?Compare these values with those computed in parts (A) and (D). Why are they different?Upper limit

(As per our standard guidelines, we are supposed to answer only 3 sub-parts)To find the mean number…

Answered: The manager of the local Walmart…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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What is the standard deviation of the following sample data: 24, 37, 31, 48, 19, 31.
he height of women ages 20-29 is normally distributed, with a mean of 64.9 inches. Assume σ=2.8 inches. Are you more likely to randomly select 1 woman with a height less than 66.1 inches or are you more likely to select a sample of 16 women with a mean height less than 66.1 inches? Explain. LOADING... Click the icon to view page 1 of the standard normal table. LOADING... Click the icon to view page 2 of the standard normal table. What is the probability of randomly selecting 1 woman with a height less than 66.1 inches? nothing (Round to four decimal places as needed.)
A sample of 25 freshmen at a major university completed a survey that measured their degree of racial prejudice (the higher the score, the greater the prejudice). The same 25 students completed the same survey during their senior year. Compute measures of central tendency (mean, and median ) please explain the result? 10 45 35 27 50 35 10 50 40 30 40 10 10 37 10 40 15 30 20 43 23 25 30 40 10
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The following data represents the number of blogs that a sample of students state they follow. 12, 3, 10, 9, 0, 1, 8, 7, 3, 10, 19 Calculate the standard deviation.
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The sample standard deviation is a measure of what?
Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One way to help make this decision is to look at the mean incomes of these two groups. Suppose that 15 people with bachelor’s degrees in education were surveyed. Their mean annual salary was $⁢31,500 with a standard deviation of $⁢7900. Seventeen people with doctoral degrees in education were found to have a mean annual salary of $⁢47,500 with a standard deviation of $⁢6900. Assume that the population variances are not the same. Construct a 99% confidence interval to estimate the true difference between the mean salaries for people with doctoral degrees and undergraduate degrees in education. Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries for people with undergraduate degrees. Round the endpoints of the interval to the nearest whole number, if necessary.

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