Question

In: Math

2.Thirty GPAs from a randomly selected sample of statistics students at a college are linked below....

2.Thirty GPAs from a randomly selected sample of statistics students at a college are linked below. Assume that the population distribution is approximately Normal. The technician in charge of records claimed that the population mean GPA for the whole college is 2.81. a. What is the sample​ mean? Is it higher or lower than the population mean of 2.81​? b. The chair of the mathematics department claims that statistics students typically have higher GPAs than the typical college student. Use the​ four-step procedure and the data provided to test this claim. Use a significance level of 0.05.

2.86,3.37,3.17,2.51,3.49, 2.75, 3.04, 3.59,2.65,3.97,2.89,2.66,3.52,3.06, 2.79,3.45,2.47,3.14,3.43,3.13,3.18,3.08,3.09,2.96,3.49, 3.43,2.73,3.14, 3.11,3.03

Solutions

Expert Solution

We shall use the one sample t-test.

milcah answered 1 year ago
Next > < Previous

Related Solutions

Thirty GPAs from a randomly selected sample of statistics students at a college reported a mean...
Thirty GPAs from a randomly selected sample of statistics students at a college reported a mean of 3.11 and the standard deviation was 0.36. Assume that the population distribution is approximately Normal. The technician in charge of records claimed that the population mean GPA for the whole college is 2.88. The chair of the mathematics department claims that students typically have higher GPAs than the typical college student. Test this claim. State the null and alternative hypotheses Find the test...
Thirty randomly selected students took the calculus final. If the sample mean was 75 and the...
Thirty randomly selected students took the calculus final. If the sample mean was 75 and the standard deviation was 7.2​, construct a​ 99% confidence interval for the mean score of all students.
Thirty randomly selected students took the calculus final. If the sample mean score was 79 and...
Thirty randomly selected students took the calculus final. If the sample mean score was 79 and the standard deviation was 7 , find the 99% confidence interval for the mean score of all students. Assume the population is normally distributed and round to two decimal places.
2. A simple random sample of 1oo community college students was selected from alarge community college....
2. A simple random sample of 1oo community college students was selected from alarge community college. The gender of each student was recorded, and each student was asked the following questions. 1. Have you ever had a part time job? 2. If you answered yes to the previous question, was your part-time job in the summer only? The responses are summarized in the table below. Job Experience · 'iINever had a part-time job F· -------··-·- -~--·-····- ---·---· -·--- ---- ....
The grades of 5 randomly selected students in Engineering Statistics are shown below. Construct a 95%...
The grades of 5 randomly selected students in Engineering Statistics are shown below. Construct a 95% two-sided confidence interval for the true mean of student grades? Students 1 2 3 4 5 Grades 95 85 65 75 80
A sample of 1000 college students at NC State University were randomly selected for a survey....
A sample of 1000 college students at NC State University were randomly selected for a survey. Among the survey participants, 108 students suggested that classes begin at 8 AM instead of 8:30 AM. The sample proportion is 0.108. What is the lower endpoint for the 90% confidence interval? Give your answer to three decimal places. (Note that due to the randomization of the questions, the numbers in this question might be different from the previous question.) Answer:
2-Sample Tests: Thirty crew members of this expedition were randomly selected to be studied in each...
2-Sample Tests: Thirty crew members of this expedition were randomly selected to be studied in each of three different experiments, for a total of 90 crew members randomly selected. A group of 30 volunteers were used, for control groups, in each experiment where 2-samples were used. The goal was to determine if the differences between the experimental and control groups was sufficiently large enough to justify further study or action (neurological, psychological, or physical). Hypothesis Test 1: Neurological Assessment ->...
2-Sample Tests: Thirty crew members of this expedition were randomly selected to be studied in each...
2-Sample Tests: Thirty crew members of this expedition were randomly selected to be studied in each of three different experiments, for a total of 90 crew members randomly selected. A group of 30 volunteers were used, for control groups, in each experiment where 2-samples were used. The goal was to determine if the differences between the experimental and control groups was sufficiently large enough to justify further study or action (neurological, psychological, or physical). Hypothesis Test 1: Neurological Assessment ->...
Thirty-three items are randomly selected from a population of 350 items. The sample mean is 32,...
Thirty-three items are randomly selected from a population of 350 items. The sample mean is 32, and the sample standard deviation 6. Develop a 90% confidence interval for the population mean. (Round the t-value to 3 decimal places. Round the final answers to 2 decimal places.)   The confidence interval is between  and
Thirty-four items are randomly selected from a population of 260 items. The sample mean is 33,...
Thirty-four items are randomly selected from a population of 260 items. The sample mean is 33, and the sample standard deviation 6. Develop a 95% confidence interval for the population mean. (Round the t-value to 3 decimal places. Round the final answers to 2 decimal places.)   The confidence interval is between and.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT