Unit 6 Quiz Review

1) A random sample of 100 observations were taken from a population and 40 successes were obtained.  If you were to construct a 90% confidence interval for the true proportion of successes in the population, what would the upper bound be for the confidence interval?

Initialize the value of 'upper' below to the hundredths place.

2) Suppose we want to test the hypothesis that p = .4 against the alternative hypothesis that p is greater than .4. We obtain a random sample of 200 observations from the population and obtain 88 successes.  What is the p-value for the test?

Initialize the value of 'pValue' below to the hundredths place.

3) A random sample of size n = 100 from population A yielded 60 successes.  A random sample of size n = 100 from population B yielded 40 successes.  If you were to construct a 95% confidence interval for the difference in proportions between population A and population B, what is the lower bound for the confidence interval.

Initialize the value of 'lower' below to the nearest hundredths place.

4) Suppose we want to test to determine if there is a difference in the proportion of successes in population A vs. population B.

We take a random sample of 50 observations from population A and obtain 30 successes.

We take a random sample of 100 observations from population B and obtain 66 successes.

What is the p-value for the appropriate hypothesis test?

Initialize the value of 'pValue' below rounded to the nearest hundredths place.