Mean, Median, Mode, Range, and Standard Deviation

The salary of the employees in the office were $15,000; $18,000; $16,000; $14,000; $90,000; and $17,000.  What is the best measure of the central tendency of the salaries?

• Mean

• Median

• Mode

• Range

68% of the marks in a test are between 51 and 64

Assuming this data is normally distributed, what are the mean and standard deviation?

• Mean = 57

  S.D. = 6.5

• Mean = 57

  S.D. = 7

• Mean = 57.5

  S.D. = 6.5

• Mean = 57.5

  S.D. = 13

434 Company pack coffee in bags marked as 250 g

A large number of packs of coffee were weighed and the mean and standard deviation were calculated as 255 g and 2.5 g respectively.

Assuming this data is normally distributed, what percentage of packs are underweight?

• 2.5%

• 3.5%

• 4%

• 5%

What's the probability of the gray area?

(Mean = 55, Standard dev = 2.5)

• 0.8185

• 0.8413

• 0.8641

• 0.8389

What is the interquartile range (IQR)?

• 4

• 64

• 60

• 8

What is the Interquartile Range?

• 28 cm

• 12 cm

• 33 cm

• 5 cm

What is the mode?
100, 101, 102, 100, 101, 102, 100, 101, 102, 100

• 100

• 102

• 101

• 103

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below: 
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 11

What is the mode of 16,18,20,21,21,21,32,40?

• 21

• 56

• 7

• 18

What is the mean?

• happening the most

• the number in the middle

• biggest-smallest

• the average