Homework Answers
Part - 1: Boxplot is roughly symmetric so it is reasonable to assume that population is approximately normal.
Part - 2: Our hypotheses will be:
Ho: 
= 2.85
H1: 
2.85
This hypothesis test is a two - tailed test.
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GPA: The mean GPA at a certain university is 2.85. Following are GPAs for a random...
GPA: The mean GPA at a certain university is 2.85. Following are GPAs for a random sample of 16 business students...
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A simple random sample of 17 business majors from a certain university had a mean GPA...
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QUESTION 4 The GPAs of all students enrolled at a large university have an approximately normal...
QUESTION 4 The GPAs of all students enrolled at a large university have an approximately normal distribution with a mean of 3.05 and a standard deviation of 0.30. Find the probability that the mean GPA of a random sample of 49 students selected from this university is 2.75 or lower. Round your answer to four decimal places. Attach File
A researcher was asked to estimate mean GPA of all students at Pace University in 2016. He has selected at random 30 students and calculated their mean GPA. It was found to be equal to 3.2. The sampl...
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The University of Michigan's business school claims it has the highest average GPA in the Big...
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A researcher was asked to estimate mean GPA of all students at Pace University in 2016. He has selected at random 30 students and calculated their mean GPA. It was found to be equal to 3.2. The sample size e) f) Number of classes the researcher can use to summarize his findings (hint: use 2>n) g) Can the researcher apply central limit theorem? (yes /no) Explain h) What is the shape of this sampling distribution? (normal / approximately normal) (hint:...
You are testing the claim that the mean GPA of night students is different from the mean GPA of day students. A sample of 20 night students and 21 day students and their GPA's are recorded below. Test the claim using a 10% level of significance. Assume the population variances are unequal and that GPAs are normally distributed. Give answers to 4 decimal places. 3.33 GPA-Night GPA-Day 3.3 2.84 3.06 3.05 3.67 2.98 3.31 3.5 3.48 3.17 3.01 2.81 2.84...
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