Statistics

Front

Calculate the mean and median for the data set: 6, 7, 12, 8, 7, 4, 8, 8, 7

Back

mean: 7.44 median: 7

Front

33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?

Back

13

Front

What does the standard deviation tell us about the data set?

Back

How spread out the numbers are

Front

If 160 people were surveyed, how many people were at least 60 inches tall?

Back

120

Front

Which of the following stats is incorrect? 70, 87, 93, 95, 82, 94

Back

median: 94

Front

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days. About what percent of the products last between 9 and 18 days?

Back

81.5%

Front

The z-score represents...

Back

the amount of standard deviations a data value is above or below the mean.

Front

Fernando is 60 inches tall. The average height for his age and gender is 68 with a standard deviation of 10 inches. If the average height of males is normally distributed, what percent of his peers are shorter than him?

Back

21.19%

Front

Z-score for 40 yards sprint time of 5.6 seconds (mean = 5.2, SD = 0.3)?

Back

1.33

Front

Ages in Meru area, Ipoh: mean 43, SD 14, population 5,000. How many are older than 57?

Back

800