Homework Answers
The statistical software output for this problem is:
Hence,
Part - 1: Reasonable
Part - 2: Hypotheses:
H0 : μ = 2.85
H1 : μ ≠ 2.85
This hypothesis test is two tailed test.
Part - 3: P - value = 0.1369
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GPA: The mean GPA at a certain university is 2.85. Following are GPAs for a random sample of 16 business students...
GPA: The mean GPA at a certain university is 2.85. Following are GPAs for a random...
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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...
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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