9.28 The file Fast Casual contains the amount that a sample of15 customers spent for lunch ($) at a fast-food restaurant:7.426.295.836.508.349.51 7.10 6.80 5.904.896.505.527.908.309.60a. At the 0.05 level of significance, is there evidence that the meanamount spent for lunch is different from $6.50?b. Determine the p-value in (a) and interpret its meaning.c. What assumption must you make about the population distribu-tion in order to conduct the t test in (a) and (b)?d. Because the sample size is 15, do you need to be concernedabout the shape of the population distribution when conductingthe t test in (a)? Explain.

Given data: Significance level = 0.05 Sample size = 15

Answered: 9.28 The file Fast Casual contains the…

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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Listed below are heights (cm) randomly selected from the sample of women and heights (cm) randomly selected from the sample of men. Use a 0.01 significance level to test the claim that women have heights with a mean that is less than the mean height of men. Women: 160.3 167.7 166.9 153.3 160.0 177.3 169.1 134.5 163.3 171.1 Men: 190.3 169.8 179.8 179.8 177.0 178.5 173.5 178.7 179.0 181.3 (atuioq ) (a noqqua ol ebnsbivs mioe smih al fanliooin boe nowod noislonos 10onil a lo imi
Refer to the accompanying data table, which shows the amounts of nicotine (mg per cigarette) in king-size cigarettes, 100-mm menthol cigarettes, and 100-mm nonmenthol cigarettes. The king-size cigarettes are nonfiltered, while the 100-mm menthol cigarettes and the 100-mm nonmenthol cigarettes are filtered. Use a 0.05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of nicotine. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference? E Click the icon to view the data table of the nicotine amounts. Nicotine amounts (mg) ..... Determine the null and alternative hypotheses. Но King-Size 100-mm Menthol 100-mm Nonmenthol 9 Brand Nicotine (mg) Brand Nicotine (mg) Brand Nicotine (mg) H1 1 1.5 1 1.2 1 0.9 1.0 2 1.0 2 1.2 Find the F test statistic. 3 1.0 3 1.1 3 0.4 4 1.2 4 0.8 4 1.2 F = (Round to four decimal places as needed.) 5 1.4 1.3 1.1 6 1.3 1.4 0.7 Find the P-value using the F test…
Refer to the accompanying data table, which shows the amounts of nicotine (mg per cigarette) in king-size cigarettes, 100-mm menthol cigarettes, and 100-mm nonmenthol cigarettes. The king-size cigarettes are nonfiltered, while the 100-mm menthol cigarettes and the 100-mm nonmenthol cigarettes are filtered. Use a 0.05 significance level to test the claim that the three categories of cigarettes yield the same mean amount of nicotine. Given that only the king-size cigarettes are not filtered, do the filters appear to make a difference? LOADING... Click the icon to view the data table of the nicotine amounts. Nicotine amounts (mg) Dialog content starts King-Size 100-mm Menthol 100-mm Nonmenthol Brand Nicotine (mg) Brand Nicotine (mg) Brand Nicotine (mg) 1 1.3 1 0.9 1 0.2 2 1.2 2 1.0 2 1.1 3 1.0 3 1.2 3 0.6 4 1.1 4 0.9…
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their responses are shown on the right. 13 30 4 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median. Which measure of central tendency better describes hours worked? 13 6. 17 19 23 18 18 21 27 24 9 25 ..... Choose the correct frequency histogram below. OA. O B. C. Hours Worked Hours Worked Hours Worked per Week per Week per Week 10 20 30 10 20 30 10 20 30 hours hours hours Is the histogram for the data set skewed right, skewed left, or symmetric? skewed right skewed left O symmetric The mean number of hours worked by college students outside the home is approximately hours. (Type an integer or decimal rounded to three decimal places as needed.) The median number of hours worked by college students outside the home is hours. Which measure of central tendency better describes hours worked? median mode…
47
A national nursing organization is lobbying congress for sunding to hire more nurses nationwide. One of the arguments is that nurses, on average, work significantly longer than full time duty, assuming full time is 40 hours a week. A sample of n=9 nurses had the following work hours last week: 43, 45,48,41,45,50,50,53,48 Calculate the mean length of work hours for the sample.
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5.35 Cyberbullying, continued. Refer to Exercise 5.33. a. What is the expected number of undergraduates in your sample who say that they have received hurtful comments online in the past 30 days? What is the expected number of undergraduates who say that they have not received hurtful comments online in the past 30 days? What do the two means add up to?
A random sample of 15 college students were asked "How many hours per week typically do you work outside the home?" Their responses are shown on the right. 6. 34 1 Determine the shape of the distribution of hours worked by drawing a frequency histogram and computing the mean and median. Which measure of central tendency better describes hours worked? 8 7 10 15 12 15 16 11 26 12 6 11 ..... Choose the correct frequency histogram below. A. Hours Worked В. Hours Worked C. Hours Worked per Week per Week per Week 10 20 30 10 20 30 10 20 30 hours hours hours Is the histogram for the data set skewed right, skewed left, or symmetric? skewed right symmetric skewed left The mean number of hours worked by college students outside the home is approximately hours. (Type an integer or decimal rounded to three decimal places as needed.) The median number of hours worked by college students outside the home is hours. Which measure of central tendency better describes hours worked? mode mean median…
ndependent random samples of professional football and basketball players gave the following information. Heights (in ft) of pro football players: x1; n1 = 45 6.31 6.51 6.50 6.25 6.50 6.33 6.25 6.17 6.42 6.33 6.42 6.58 6.08 6.58 6.50 6.42 6.25 6.67 5.91 6.00 5.83 6.00 5.83 5.08 6.75 5.83 6.17 5.75 6.00 5.75 6.50 5.83 5.91 5.67 6.00 6.08 6.17 6.58 6.50 6.25 6.33 5.25 6.65 6.50 5.85 Heights (in ft) of pro basketball players: x2; n2 = 40 6.09 6.56 6.25 6.58 6.25 5.92 7.00 6.41 6.75 6.25 6.00 6.92 6.84 6.58 6.41 6.67 6.67 5.75 6.25 6.25 6.50 6.00 6.92 6.25 6.42 6.58 6.58 6.08 6.75 6.50 6.83 6.08 6.92 6.00 6.33 6.50 6.58 6.85 6.50 6.58 (a) Use a calculator with mean and standard deviation keys to calculate x1, s1, x2, and s2. (Round your answers to four decimal places.) x1 = s1 = x2 = s2 = (b) Let μ1 be the population mean for x1 and let μ2 be the population mean for x2. Find a 90% confidence interval for μ1 – μ2. (Round your answers to…

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