GEE 15

The number of miles that Jenna cycled each week for a 7-week period is shown: 
36, 42, 28, 52, 48, 36, 31 
What is the median number of miles Jenna cycled?

• 24
• 36
• 39
• 52

Which of the following is a measure of variability?

• mean
• median
• mode
• standard deviation

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the sample standard deviation of Ervin's scores?

• 511.33

• 22.61

• 438.48

• 20.94

What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2

• 47.47
• 102.01
• 52.77
• 81

The data in the picture:

• is negatively skewed

• positively skewed

• symmetrical

A positive number means positive skew. Negative number means negative skew, What do you think 0 means?

• Very negatively skewed

• Moderate negative skew

• Symmetrical data

• Moderate positive skew

• Very positive skew

Correlation coefficient is the statistic that measures the strength and direction of a linear association between two quantitative variables.

• True

• False

r = -0.3 is considered to have...

• moderate negative correlation

• weak negative correlation

• no correlation

• strong negative correlation

The value of the linear correlation coefficient is zero if the points in a scatter diagram

• lie on an upward sloping line

• lie on a downward sloping line

• are scattered all over the diagram

• are close to the regression line

is the average squared difference of the values from the mean.

• Standard Deviation

• Variance  

• Product – Moment Coefficient of Correlation or Pearson r

• percentage