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Statistics Homework Assignment

Statistics Homework Assignment

Statistics Homework Assignment

Number of Minutes Exercised Per Week PART ONE Sample N Sample Mean (M) Sigma (?) Alpha 95% Confidence Interval (+/-) Lower Limit Upper Limit
89 Freshmen
43
47 1. Conclusion in words (fill in the blanks): There is a % chance that the range to contains the true .
143 Write the words/numbers that go in the blanks here:
115 2. What is the probability (or chance or risk) that the statement that “the population parameter falls between these limits” is not correct?
136 Answer:
29 3. Does the confidence interval based on this sample contain the true population mean? (we don’t always know this, but in this case we do)
44 Answer:
129 4. What might the answer to number 3 tell us about our sample of Freshmen college students?
98 Answer:
99 5. If you were to construct a 99% CI, would you expect it to be wider or narrower than the 95% CI you just figured?
115 Answer:
64
90 PART TWO
132 Null Hypothesis (H0)
72 Research Hypothesis (H1)
141 One- or Two-tailed? If one-tailed, which direction, or tail (left or right), are we interested in? Answer:
26
144 Sample Size (N)
78 Population Mean (?)
86 Population Standard Dev. (?)
110 Stand. Error of Mean (?M)
69
37 Sample Mean
42 Alpha
77 Critical Z Value (cut-off score) Be sure your value is in the correct direction(s)!
120 Sample Z
51
56 Critical p-value
87 Sample p-value
114
123 1. Are the results of your hypothesis test statistically significant? What does this mean?
28 Answer:
48 2. Decision about null and research hypotheses (write in sentence form):
107 Answer:
107 3. If the population mean were unknown, what would be the best estimate of this value?
42 Answer:
105 4. P-values represent probabilities based on the under the normal curve, and they range from to .
135 Write the words/numbers that go in the blanks here:
103 5. The particular type of hypothesis test we used here is called the test. We can use this test when the values are known.
57 Write the words/numbers that go in the blanks here:
89
100
142
45
77
133
130
107
96

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