AP Statistics Intro to Hypothesis Testing

A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. It was previously believed that 30% of adults agree that toddlers should not be taken out to eat at a restaurant. I there evidence to suggest an decrease in this rate? Which of the following is an appropriate set of hypotheses.

A study found that 11 out of 44 randomly selected adults said they agree that toddlers should not be taken out to eat at a restaurant. It was previously believed that 30% of adults agree that toddlers should not be taken out to eat at a restaurant. I there evidence to suggest an decrease in this rate? Find the z-score.

• -0.766

• 0.766

• -0.724

• 0.724

When performing a test about the population proportion, what distribution would you need to use? 

• z

• t

• chi-square

If no alpha level is given, what alpha level is assumed?

• 0.01

• 0.05

• 0.10

• 0.25

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis?

• H₀: μ = 18.4

  H₁: μ = 18.4

• H₀: μ = 18.4

  H₁: μ > 18.4

• H₀: μ = 18.4

  H₁: μ < 18.4

• H₀: μ = 18.4

  H₁: μ ≠ 18.4

A car manufacturer advertises that its new subcompact models get 47 mpg. If μ is the mileage of these cars, what could be the null and alternate hypothesis if we wanted to check if the car's mpg is overrated?

• H₀: μ = 47

  H₁: μ = 47

• H₀: μ = 47

  H₁: μ < 47

• H₀: μ = 47

  H₁: μ > 47

• H₀: μ = 47

  H₁: μ ≠ 47

Which of the following shows a right-tailed test?

• H₁: µ < 15

• H₀: µ < 15

• H₁: µ > 15

• H₀: µ > 15

Use the notation to state the alternative hypothesis and null hypothesis: "Less than 4% of high school students take Statistics."

• H_o : p = 0.04

  H₁ : p > 0.04

• H_o : p = 0.04

  H₁ : p < 0.04

• H_o : p = 0.04

  H₁ : p ≠ 0.04

• H_o : p = 0.04

  H₁ : p ≤ 0.04

What is the only option for the null hypothesis? 

• H₀ = k

• H₀ > k

• H₀ < k

• H₀ ≠ k

The weight of the average 6th grade student's backpack (with books in it) is 18.4 lbs. The principal of the school thinks that the backpack does not weight 18.4 lbs. What is the null and alternate hypothesis?

• H₀ = 18.4
  H_a = 18.4

• H₀ = 18.4
  H_a > 18.4

• H₀ = 18.4
  H_a < 18.4

• H₀ = 18.4
  H_a ≠ 18.4