SEm 2 Final Exam - Statistics and Probability Spring 2021

Each student in a random sample of seniors at a local high school participated in a survey. These students were asked to indicate their gender and their eye color. The table above summarizes the results of the survey:

Suppose that one of these seniors is randomly selected. What is the probability that the selected student is a male or has blue eyes?

• 40/110

• 40/80

• 110/200

• 150/200

The Archer basketball team scored the following for its first 8 games: 51, 67, 55, 70, 53, 74, 58, and 49. Determine the mean, median for that series of numbers.

• mean of 57.6 and median of 55

• mean of 59.6 and median of 58

• mean of 59.6 and median of 56.5

• mean of 59.6 and median of 55

A jar contains 2 pink, 6 red, and 4 blue marbles. If you pick one marble without looking, what is the probability that the marble you pick will be red or blue?

• 5/6
• 1/2
• 1/3
• 1/6

When you add all the data and then divide by number of data points, this is called

• median

• outlier

• mean

Find the mode of the following data:

2, 3, 2, 4, 4, 6, 4, 7

Find the mode of the following data:

2, 3, 2, 4, 4, 6, 4, 7

If the data set has no extreme values or numbers that are identical, it is best to use _________ to find the measure of center.

• median

• mean

• mode

The measure of variability is:

• median

• range, first quartile, third quartile,

• interquartile range, outliers

The following data is showing the number of cell phones returned to the manufacturer each month for a year.

Number of Cell Phones Returned:

20 15 24 37 55 1 39 40 3 35 28 0

What are the mean, median, and mode of the data?

• mean = 27.00; median = 26; no mode

• mean = 24.75; median = 26; no mode

• mean = 24.75; median = 20; mode = 55

Find the mean and standard deviation (Sx) for the following data set:

89, 72, 100, 87, 65, 98, 77, 92

• 85, 12.5

• 75.3, 30.65

• 85, 11.7

• 88, 12.5