Stats Medic Chapter 5

When calculating the probability of "At Least one" event occurring you should use the following strategy:

• 1 + P(none)

• 1 - P(none)

• 1 - P(all)

• P(none) + P(all)

Use the image of the normal graph provided. What is the value of the mean?

• 6

• 34

• 52

• 70

• 15.87%

• 15.39%

• 9.68%

• 84.61%

• 99.04%

• 0.96%

• 98.93%

• 97.68%

How is the data distributed in this histogram?

• Symmetrically

• Skewed Right

• Skewed Left

What is the branch of mathematics dealing with the collection, analysis, interpretation, presentation, and organization of data?

• Statistics

• Algebra

• Geometry

• Calculus

Grades on the elementary statistics final at TWU are normally distributed, with μ=74 and σ=5. Billy scored a 71 on the final and Susan scored a 77. Who did relatively better on the final?

• Billy

• Susan

• both did relatively better

• neither did relatively better

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 12 and 15 days?

• 68%

• 34%

• 16%

• 2.5%

A data set has a mean of 290 and a standard deviation of 20. Calculate the z-score for 265.

This data is normally distributed.  What percent of the data is in the shaded region?

• 68%

• 95%

• 99.7%

• 50%