Louis Armstrong, salesman for the Dillard Paper Company, has five accounts to visit per day. It is suggested that the variable, sales by Mr. Armstrong, may be described by the binomial distribution, with the probability of selling each accounts being 0.4. Given the following frequency distribution of Armstrong’s number of sales per day, can we conclude that the data do in fact follow the suggested distribution? Use the 0.05 significance level. Number of sales per day 0 1 2 3 4 5 Frequency 10 41 60 20 6 3

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the next 3 questions concern the results of a survey of 18,000 adults between 20 and 64 years of age. Respondents were asked to indicate whether they would endorse a public health initiative. After data were collected, the distribution of the probability of endorsing the initiative was assessed.The distribution was judged to be roughly positively skewed Four potential plots of these data are presented below (only one is correct):9.   If the survey included all adults aged 18+, one more category would be inserted at the low end of the age range. What would it be? d. 18-20c. 18-19b. 15-20a. 15-19

PLS. Solve Quickly Applications Problems According to a Sallie Mae survey and credit bureau data, in 2008, college students carried an average of $3173 debt on their credit cards (USA TODAY, April 13, 2009). Suppose that cur- rent credit card debts for all college students have a normal distribution with a mean of $3173 and a standard deviation of $800. Find the probability that credit card debt for a randomly se- lected college student is between $2109 and $3605.