Pre-Ap Probability and Statistics

The probability of it raining today is 30%.  What is the probability that it will NOT rain?

• 30%

• 70%

• 100%

• 0%

Find the MAD of these numbers 25, 23, 28, 29, 27, 32, 24, 26, 22, 27

• MAD=26.3

• MAD=29.3

• MAD=2.93

• MAD=2.63

Which of the following best describes a Type I error?

• The null is true, but we mistakenly reject it.

• The null is false and we reject it.

• The null is false, but we fail to reject it.

• The null is true but we fail to reject it.

• The null is true, and we fail to reject it.

To test a claim about a mean, when the population standard deviation is unknown we use:

• z procedures

• Pythagorean Theorem

• t procedures

• np > 10 and n(1-p) > 10

When p-value is greater than alpha we:

• Accept Ho

• Accept Ha

• Fail to reject Ho

• Reject Ho

Margin of error equals:

• Critical Value ∗ standard Error

• z*

• 1.96

• Standard Error

What do we use to estimate unknown parameters?

• Hypothesis Test

• Confidence Interval

• Trig Identity

• Guess and check

You spin the spinner. Choose 2 events that have the same probability value.

• spinning a number that is a multiple of 2

• spinning a number that is a multiple of 3

• spinning a number higher that 6

• spinning an odd number

There are 200 different pieces of fruit in a barrel. There are 42 apples, 82 oranges, and 76 pears. Find the probability of selecting each fruit by completing the table on your paper.

The 1st row is done for you as an example.

• I have completed the table on my paper.

• I have not completed the table on my paper.

You toss two dimes 24 times and record the results. Copy and complete the table to show the experimental probability of each outcome. Then choose the correct answer.

• P(head and head) = 24/4 or 6%

• P(head and tail) = 1/15 or 6.7%

• P(tail and tail) = 5/24 or 20.8%