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1. I read an article about a new drug which stated that "the incidence of side effects was similar to placebo, P-value > 0.05." I want to know if the results are significant at = 10%. With the information given,
A. I will reject the null hypothesis of no difference at 10%.B. I will not reject the null hypothesis of no difference at 10%.C. There is not enough information given.
2. I want to estimate the proportion of individuals in my area who think the public school system needs major overhauling. If I believe the proportion will be about 35%, how many individuals will I need to sample if I want a 95% margin of error to be no more than 3%?
A. at least 30B. at least 1068C. at least 972
3. I want to conduct a poll to discover the proportion of individuals who believe that global warming is not going to be a problem. If I believe the proportion is about 80%, how many individuals will I need to sample to have a 90% confidence interval with a margin of error no more than 5%?
A. at least 174B. at least 246C. at least 271
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Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..
what is the chance the average contents of the cans will be less than advertised and what will be the standard deviation of the number of men who help at home, based on the first survey
Find out optimal decision
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
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