Solutions only, no work needs to be shown The daily sales at a convenience store produce a distribution that is approximately normal with a mean of...

Solutions only, no work needs to be shown

1. The daily sales at a convenience store produce a distribution that is approximately normal with a mean of 1290 and a standard deviation of 150. In your intermediate calculations, round z-values to two decimal places.

A. The probability that the sales on a given day at this store are more than $ 1405, rounded to four decimal places, is:

B. The probability that the sales on a given day at this store are less than $ 1305, rounded to four decimal places, is:

C. The probability that the sales on a given day at this store are between $ 1200 and $ 1300, rounded to four decimal places, is:

2. A sample of size 81 from a population having standard deviation σ = 35 produced a mean of 234.00. The 95% confidence interval for the population mean (rounded to two decimal places) is:

A. The lower limit is:

B. The upper limit is:

3. The alternative hypothesis is a claim about a: Select one:

A. population parameter, where the claim is assumed to be true until it is declared false

B. population parameter, where the claim is assumed to be true if the null hypothesis is declared false

C. statistic, where the claim is assumed to be true if the null hypothesis is declared false

D. statistic, where the claim is assumed to be false until it is declared true

4. In a hypothesis test, the probability of committing a Type I error is called the: Select one

A. beta error

B. confidence level

C. confidence interval

D. significance level