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You are interested to test if the average amount spent on textbooks by McMaster students is...
The campus bookstore reported that students paid an average of $255 per semester for textbooks. To...
The campus bookstore reported that students paid an average of $255 per semester for textbooks. To verify this statement, the student union decided to select a random sample of students and found the following amounts, in dollars, spent for textbooks: $252 $289 $298 $266 $254 $261 $275 $263 $268 $315 $251 $266 $320 At the 0.10 significance level, can we conclude that the average amount spent on textbooks per semester has increased? a. What is the decision rule? (Round the...
To test whether all University students spent more than $300 on textbooks during the spring 2020...
To test whether all University students spent more than $300 on textbooks during the spring 2020 semester, on average, the school collected data for a random sample of 76 studentss. If the calculated value for the associated test statistic equals +1.9921 and the population standard deviation is unknown, determine the p-VALUE for the associated test
A publishing company claims that in fall 2019, the average price of college textbooks for a...
A publishing company claims that in fall 2019, the average price of college textbooks for a single semester is $385. Suppose you decide to collect data from a random sample of students to assess whether the publisher's claim is reasonable, and you find that in a random sample of 22 college students, the mean price of textbooks for the fall 2019 semester was $433.50 with a standard deviation of $86.92. At the 0.01 significance level, is there sufficient evidence to...
A college’s admissions guide state that students spend approximately $300 for textbooks each semester. A random...
A college’s admissions guide state that students spend approximately $300 for textbooks each semester. A random sample of 31 college students finds that the sample mean for the amount spent on textbooks is $365. Assume that the standard deviation for the population is $75. Test at the a = .02 level to determine if students spend significantly more than the amount stated in the admission’s guide.
A publishing company claims that in fall 2019, the average price of college textbooks for a...
A publishing company claims that in fall 2019, the average price of college textbooks for a single semester is $385. Suppose you decide to collect data from a random sample of students to assess whether the publisher's claim is reasonable, and you find that in a random sample of 22 college students, the mean price of textbooks for the fall 2019 semester was $433.50 with a standard deviation of $86.92. At the 0.01 significance level, is there sufficient evidence to...
The college bookstore tells prospective students that the average cost of its textbooks is $102. A...
The college bookstore tells prospective students that the average cost of its textbooks is $102. A random sample of 81 textbooks found the mean price to be $105.80, with a sample standard deviation of $22.50. Assuming the distribution of textbook prices is normally distributed, does this sample indicate that the average cost of textbooks is actually greater than $1027 Use a 5 level of significance for your test. a.) What is a State the null and alternate hypotheses. Will you...
A survey of 93 men found that an average amount spent on St. Patrick's day of...
A survey of 93 men found that an average amount spent on St. Patrick's day of $51 with a standard deviation of $16. A similar survey of 87 women found they spent an average of $44 with a standard deviation of $18. When testing the hypothesis (at the 5% level of significance) that men spend more than women on St. Patrick's day, what is the test statistic? (please round your answer to 2 decimal places)
A publishing company claims that in fall 2019, the average price of college textbooks for a...
A publishing company claims that in fall 2019, the average price of college textbooks for a single semester is $385. Suppose you decide to collect data from a random sample of students to assess whether the publisher's claim is reasonable, and you find that in a random sample of 22 college students, the mean price of textbooks for the fall 2019 semester was $433.50 with a standard deviation of $86.92. At the 0.01 significance level, is there sufficient evidence to...
You are the buyer for your university bookstore. One of the textbooks has a cost to...
You are the buyer for your university bookstore. One of the textbooks has a cost to you of $155 and you sell it to students for $310. In this case, however, you cannot salvage any value from copies that do not sell because a new edition is published every semester. Demand for this text averages 135 copies each semester, with a standard deviation of 21 copies. Use Appendix A. How many should you order each semester? (Round your intermediate calculations...
1. To determine the average number of hours spent studying by college students per week, a...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
The college bookstore tells prospective students that the average cost of its textbooks is $102. A random sample of 81 textbooks found the mean price to be $105.80, with a sample standard deviation of $22.50. Assuming the distribution of textbook prices is normally distributed, does this sample indicate that the average cost of textbooks is actually greater than $1027 Use a 5 level of significance for your test. a.) What is a State the null and alternate hypotheses. Will you...
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