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Identify the rejection region and give conclusion:
1. In a random sample of 400 persons who were given a flu vaccine, 136 said that they experienced some type of discomfort. Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
2. Do the data provide sufficient evidence to conclude that the proportion of those who experience some type of discomfort is more than 30%? Answer the question using the following steps
a. Identify the rejection region.
b. Draw your conclusion, and interpret your conclusion in the context of the problem.
how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%, I want to know if the results are significant at = 10%. With the information given.
Find a 90% confidence interval for the difference between the proportion of men and the proportion of women who approved of Reagan's performance. What assumption do you make to use this method?
A market survey was conducted to estimate the proportion of homemakers who would recognize the brand name of a cleanser based on the shape and color of the container. Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name.
a. What is the probability of a type I error? b. Give the formula for the test statistic.
USA Today reported that 11% of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day, what is the probability that
Which of the following assumptions for inference about a proportion using a confidence interval are violated,
A major benefit of two-way ANOVA over several one-way ANOVAs, If an F test for interaction is significant.
Formulate a suitable null and alternative hypothesis to test the students' claim that they followed their instructor's recommendation at a 5% level of significance and interpret your findings.
For sample of size 100, what is the mean and standard deviation of the sample mean.
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Is there a significant difference between the scores between the Republicans and the Democrats?
Find out the range (R), variance (V) and standard deviation (s) for the given set of values:
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