Math Data Analysis

The number of hours spent on math homework during one week and the math exam grades for eleven students in Ms. Smith’s algebra class is plotted on the scatter plot. Based on the plotted data, what is the correlation between the time spent on homework and the exam grade?

• positive

• negative

• no correlation

• cannot be determined

The scatter plot below represents the relationship between the number of peanuts a student eats and the student's bowling score. Which conclusion about the scatter plot is valid?

• There is almost no relationship between eating peanuts and bowling score.

• Students who eat more peanuts have higher bowling scores.

• Students who eat more peanuts have lower bowling scores.

• No bowlers eat peanuts.

The number of hours spent on math homework each week and the final exam grades for twelve students in Mr. Dylan's algebra class is plotted. Based on the line of best fit, which exam grade is the best prediction for a student who spends about 4 hours on math homework each week?

• 62

• 72

• 82

• 92

The scatterplot below shows the profit, by month, for a new company for the first year of operation. Kate drew a line of best fit, as shown in the diagram. Using this line, what is the best estimate for profit in the 18th month?

• $35,000

• $37,750

• $42,500

• $45,000

What is the median of the data set [3, 7, 9, 13, 15]?

• 7

• 9

• 11

• 13

The mean of the data set {4, 8, 6, 10, 2} is:

• 5

• 6

• 7

• 8

Find the median of the following data set: 3, 7, 9, 5, 12.

• 5

• 7

• 9

• 6

The median of the data set {12, 5, 7, 19, 12, 20} after arranging in ascending order is:

• 11.5

• 12

• 12.5

• 13

In a data set, the mean is 10, and the median is 12. Which of the following statements is true?

• The data set is evenly distributed.

• The data set is skewed to the left.

• The data set is skewed to the right.

• The mean and median cannot be different.

A survey showed that 8 out of 10 students prefer chocolate ice cream over vanilla. What is the probability that a randomly selected student prefers chocolate?

• 20%

• 40%

• 80%

• 100%