The final exam grades of a Business Statistics class are bell-shaped with a mean of 81 and a standard deviation of 4.    a. Calculate the z-score of a student scoring an 86 on the midterm. [a] b. Approximately what percentage of students scored between a 73 and 93? [b] c. Approximately what percentage of students scored below a 77? [c]

Classify the following variable, the time between two lightning strikes, as either qualitative or quantitative. If it is quantitative, also determine if it is discrete or continuous.

Let the sample space S = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, the event A = {5, 6, 12, 14} and the event B = {5, 7, 10, 12, 13}. (For parts a and b, separate the elements with commas and put your answers in numerical order.)   a. List the elements of A

A researcher is interested in the heights of all students at a local college. The researcher randomly selects 45 students and finds a mean height of 68.5 inches with a standard deviation of 2.74 inches. (Round to 3 decimal places as needed)   a. Construct a 95% confidence interval for the mean heights of all students at this college: Set up the confidence interval with the appropriate values: (Point estimate) 

There are 600 employees at Company A. Based on the above graph, answer the following questions. a. How many employees have a salary between $75,000 and $125,000? [a] b. Give the name of the shape that best describes the shape of the distribution. [b] c. Based on the shape, what is the best measure of central location? [c]

Given the following 14 values,  82   70   28   52   54   46   99   71   22   89   73   42   85   90   Calculate Q3

Let the sample space S = {3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, the event A = {4, 7, 8, 11, 12} and the event B = {3, 5, 8, 11}. (For parts a and b, separate the elements with commas and put your answers in numerical order.)   a. List the elements of A 

What type of joint is located between the metacarpals and the carpals?

A random sample of three 10 year old’s weights (in pounds) yielded the following data: [a]     [b]     [c] (Round to three decimal places as needed)   Calculate the sample standard deviation.

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