1. The distribution of IQ (Intelligence Quotient) is approximately normal in shape with a mean of 100 and a standard deviation of 13.

According to the standard deviation rule, only _______% of people have an IQ over 113.

2. A study seeks to answer the question, "Does Vitamin C level in the breast milk of new mothers reduce the risk of allergies in their breastfed infants?" The study concluded that high levels of vitamin C (measured in mg) were associated with a 30 percent lower risk of allergies in the infants.

In this scenario, "levels of vitamin C (measured in milligrams)" is what type of variable?

1. Categorical
2. Quantitative

3. Let A and B be two independent events such that P(A) = 0.26 and P(B) = 0.54.

What is P(A or B)?

Your answer should be given to 4 decimal places.

4. Concert marketing:GSU'sRialto Center for the Performing Artswanted to investigate why ticket sales for the upcoming season significantly decreased from last year's sales. The marketing staff collected data from a survey of community residents. Out of the 110 people surveyed, only 7 received the concert brochure in the mail.

Which of the following is a reason that the marketing staff should not calculate a confidence interval for the proportion of all community residents who received the concert brochure by mail?

Check all that apply.

1. The sample needs to be random, but we don't know if it is.
2. The actual count of community residents who received the concert brochure by mail is too small.
3. The actual count of community residents who didn't receive the concert brochure by mail is too small.
4. n^pis not greater than 10.
5. n(1^p) is not greater than 10.