Assume that a random sample of 37 full-time UT students found that their mean cost of...
Assume that a random sample of 37 full-time UT students found that their mean cost of textbooks for class is $488 with a standard deviation of $59. Test the claim that the mean cost of textbooks for full-time students is more than the average from 2010 which is $460. The test statistic is 2.89. Find the p-value.
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Assume that a random sample of 37 full-time UT students found
that their mean cost of...
A random sample of 50 students is selected and it is found that the mean of...
A random sample of 50 students is selected and it is found that the mean of daily internet usage is 70.8 minutes with standard deviation of 13.8 minutes. A hypothesis test was performed to determine whether the true mean usage, µ equal to 72.0 minutes or not. What is the p-value of the test?
The fill volume of a random sample 37 cans of Coke were found to have a...
The fill volume of a random sample 37 cans of Coke were found to have a mean of ?⎯⎯⎯=12.15 with standard deviation of ?=0.13. Find the value of the test statistic ? for evaluating the null hypothesis ?=12. The test statistic is?
= Question Help For a random sample of 400 students, the mean cost for textbooks during...
= Question Help For a random sample of 400 students, the mean cost for textbooks during the first semester of college was found to be $374.75, and the sample standard deviation was $30.81. Assuming that the population is normally distributed, find the margin of error of a 95% confidence interval for the population mean The margin of error for a 98% confidence interval is (Round to two decimal places as needed.) I
A random sample of 15 night students was taken with a sample mean GPA of 2.82...
A random sample of 15 night students was taken with a sample mean GPA of 2.82 and a standard deviation of 0.05. A random sample of 17 day students was taken with a sample mean GPA of 2.79 and a standard deviation of 0.07. Test the claim that the mean GPA of night students (un) is greater than than the mean GPA of day students (up) at a = 0.10. Assume that the data come from normal populations with unequal...
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...
The president of a university claims that the mean time spent partying by all students at...
The president of a university claims that the mean time spent partying by all students at this university is not more than 7 hours per week. A random sample of 40 students taken from this university showed that they spent an average of 7.5 hours partying the previous week with a sample standard deviation of 2.3 hours. Use the p-value approach to test at a 5% significance level whether the president’s claim is true.
A book about different colleges' reports that the mean time students at a particular university study...
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
You are interested to test if the average amount spent on textbooks by McMaster students is...
You are interested to test if the average amount spent on textbooks by McMaster students is lower than $460 per semester. You take a random sample of 801 students at McMaster and find that students in your sample spend on average $495.2 on textbooks per semester. If the standard deviation of the sample, s, is $104.47, calculate the associated test statistic (t-statistic) for this test. Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer...
The college bookstore tells prospective students that the average cost of its textbooks is $52 with...
The college bookstore tells prospective students that the average cost of its textbooks is $52 with a standard deviation of $4.50. A group of smart statistics students thinks that the average cost is higher. In order to test the bookstore’s claim against their alternative, the students will select a random sample of size 100. Assume that the mean from their random sample is $52.80. What is the Z-score? What percentage of samples would have a higher average cost for text...
= Question Help For a random sample of 400 students, the mean cost for textbooks during the first semester of college was found to be $374.75, and the sample standard deviation was $30.81. Assuming that the population is normally distributed, find the margin of error of a 95% confidence interval for the population mean The margin of error for a 98% confidence interval is (Round to two decimal places as needed.) I
A random sample of 15 night students was taken with a sample mean GPA of 2.82 and a standard deviation of 0.05. A random sample of 17 day students was taken with a sample mean GPA of 2.79 and a standard deviation of 0.07. Test the claim that the mean GPA of night students (un) is greater than than the mean GPA of day students (up) at a = 0.10. Assume that the data come from normal populations with unequal...
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 book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
You are interested to test if the average amount spent on textbooks by McMaster students is lower than $460 per semester. You take a random sample of 801 students at McMaster and find that students in your sample spend on average $495.2 on textbooks per semester. If the standard deviation of the sample, s, is $104.47, calculate the associated test statistic (t-statistic) for this test. Note: 1- Round your intermediate numbers to 4 decimal places. 2- Round you final answer...
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