Statistics, Mean Median Mode, Interquartile Range, Dot Plots Circle Graphs

If the mean is 100 and the standard deviation is 5

What is the probability of having a value between 72 & 102?

• 0.3448

• 0.6554

• 0.0854

• 0.7132

If the mean if 100 and the standard deviation is 5

What is the probability of a value that is AT LEAST 95.

Type your answer to the nearest ten thousandth place

(a)  

On a standard normal curve, what is the probability of a number being AT LEAST -2.15?

Type your answer to the ten thousandth place.

(a)  

With a mean of 84 and standard deviation of 2, what value would put you in the top 10%?

• 86.56

• 92.11

• 105.65

• 87.09

With a mean of 70 and standard deviation of 7, between what two values does 68% of the data fall between?

• 52 - 70

• 49 - 91

• 63 - 77

• 56 - 84

What shape is a normal distribution curve?

• Half curve

• Round curve

• Bell curve

• Square curve

The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds.  What is the z-score for a player who runs a time of 5.6 seconds?

• -1.33

• 1.33

• 0.88

• 1.02

What is the formula to find the z-score for population?

• z=X-M

• z=σ-M/μ

• ^z/M=μ

• z=X-μ/σ

The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.

• True

• False

Find the z-score value corresponding if the location is below the mean by 2 standard deviations

• +2.00

• -2.00

• +1.25

• -1.00