I need help with 4 Stats questions
problem is worth 10 points.
Be sure to include all
relevant information and computations (hypotheses, test statistic, p-values,
1. Text Pg. 401 #7.69 (a) â (g) For
part (b), state a clear and unambiguous decision rule for rejecting the null
hypothesis. Use this rule in part (f).
2. Text Pg. 401 #7.70 (a), (b) NOTE: The parameter represents the population
proportion of companies NOT having a hotline.
Also note that the sample size in part (b) is different from the one in
part (a). Use p-values for both tests. State
your conclusion in the context of this problem in a clear English
sentence. Here is
part (c): Based on your results, comment on whether or not there appears to
be a trend in companies willingness to provide hotlines (compare your
conclusions for each year and then comment).
3. Text Pg. 401 #7.71
Use p=.333. Also, note that
âdiffersâ implies ânot equalâ for an alternative hypothesis. Use p-values
for your analysis. State your conclusion in the context of this problem in a clear
Pg. 402 #7.75 Be sure to state the hypotheses for
the test. For the observed sample
proportion, use (417+77)/845. Use p-values in your analysis. Be
sure to state the hypotheses and the level of significance to be used.
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