The file Baseball Players_2015.xlsx, sheet named Baseball Pl…

The file Baseball Players_2015.xlsx, sheet named Baseball Players, contains salary data on all Major League Baseball players for year 2015. Based on the histogram (see question 6), is Salary skewed positively or negatively   Note: for datafile, see question 1.

According to CBS Money Watch, the average monthly household…

According to CBS Money Watch, the average monthly household cellular phone bill is $100. Suppose monthly household cell phone bills are normally distributed with a standard deviation of $11.35. What is the probability that a randomly selected monthly cell phone bill is more than $110? Round your answer to 3 decimal places. For example, if the answer is 0.52443, enter 0.524

You want to test the null hypothesis that the mean amount sp…

You want to test the null hypothesis that the mean amount spent is less than or equal to $1,400 versus a one-tailed alternative. Which of the following is the p-value for the test? (Because of potential roundoff, choose the closest.) Data file: Data file – Question 4.xlsx

The file Baseball Players_2015.xlsx, sheet named Baseball Pl…

The file Baseball Players_2015.xlsx, sheet named Baseball Players, contains salary data on all Major League Baseball players for year 2015. Is the average salary for pitcher team Washington Nationals higher than the average for all pitchers?    Note: for datafile, see question 1.

A survey conducted for the Northwestern National Life Insura…

A survey conducted for the Northwestern National Life Insurance Company revealed that 70% of American workers say job stress caused frequent health problems. Suppose a random sample of 25 American workers is selected. Based on the relevant binomial distribution, answer the following questions about X, the number of American workers who say job stress caused frequent health problems:                                   What is the probability that X is no more than 15? Round your answer to 3 decimal places. For example, if the answer is 0.52443, enter 0.524