Marking Period 4 Extra Credit

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

Find the z score if the mean is 80, standard deviation is 5, and x=87.

• -1.4

• 1.4

• -1.75

• 1.75

Find x if the mean is 20, standard deviation is 6, and z=1.32.

• 32.4

• 7.92

• -12.08

• 27.92

Assume the distribution of the heart rates of 21 year old females at rest is 68 bpm with a standard deviation of 4 bpm. If 200 women are tested, how many would have a heart rate less than 75 bpm?

• 96

• 192

• 8

• 4

Assume that the math SAT scores are normally distributed with a mean of 500 and a standard deviation of 100. If you score 480 on the math portion, what percent of those taking the test scored above you?

• 42%

• 58%

• 98%

• 92%

What data value is the upper quartile (Q3)?

• 64
• 62
• 66
• 58

What is the probability that the person picked will be a boy given they speak german? 

• .7273
• .4
• .16
• .22

What is the probability that they speak French given they are a girl? 

• 2.14
• .24
• .4
• .8571

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A male surgeon

• 0.39

• 0.58

• 0.19

• 0.68

Use the Venn diagram to find the probability that a randomly chosen doctor from Leoneville General is...

A female, but not a surgeon

• 0.42

• 0.29

• 0.13

• 0.19