AP Stats Exam Review

A mayor is concerned about the percentage of city residents who express disapproval of his job performance.  His political committee pays for a newspaper ad, hoping to keep his disapproval rating below 21%.  They will use a follow up poll to access effectiveness.  What are the correct null and alternative hypotheses?

• Ho: p=.21
  Ha: p > .21
• Ho: p< .21
  Ha: p= .21
• Ho: p> .21
  Ha: p= .21
• Ho: p= .21
  Ha: p< .21

A P-value indicates:

• the probability that the null hypothesis is true
• the probability that the alternative hypothesis is true
• the probability of the observed statistic or more extreme given the null hypothesis is true

• the probability that the null is true given the observed statistic

Which of the following is the FIRST step of a hypothesis test?

• Check assumptions & conditions
• Find your test statistic
• State your conclusion
• State your null & alternative hypotheses

A Type I error is when: 

• We obtain the wrong test statistic
• We reject the null hypothesis when it is actually true
• We fail to reject the null hypothesis when it's actually false
• We reject the alternate hypothesis when it's actually true

The measure of the strength and direction of the association can be measured by: 

• r²
• correlation
• linear regression
• S

Tags

CCSS.HSS.ID.C.9

A linear association between 2 quantitative variables has a correlation of r = - 0.568 The slope must be: 

• Positive
• Not enough Information
• Negative
• Could be either

Tags

CCSS.8.SP.A.3

Which basketball player once scored 100 points in one game?

• Michael Jordan
• Wilt Chamberlain
• Lebron James
• Steph Curry

A residual is: 

• Observed response value  - predicted response value
• Predicted response value - observed response value
• Predicted explanatory value - observed explanatory value
• Observed explanatory value - predicted explanatory value

Tags

CCSS.HSS.ID.B.6B

When testing to see if a linear relationship exists between 2 quantitative variables, the null hypothesis would be: 

• μ=0
• p=0
• σ=0
• β=0

IF P(A and B) = P(A)P(B) then A and B are 

• Disjoint
• Disjoint and Independent
• Mutually Exclusive
• Independent

Tags

CCSS.HSS.CP.A.2

CCSS.HSS.CP.A.4