Quiz  /  Ap classroom unit 4 progress check mcq answers ap lang Gate & PSU...

  • 1. 
    Conduct a test to determine whether or not the population proportion of voters in favor of proposal A is greater than 50%. In a random sample of 200 voters, 140 said that they were in favor of this proposal. Compute the test statistic.

  • z = 7.708
  • z = 5.66
  • p = 7.7 x 10-9
  • None of the above

  • 2. 
    Suppose the P-value for a hypothesis test is 0.0304. Using a = 0.05, what is the appropriate conclusion?

  • a) Reject the null hypothesis
  • b) Reject the alternative hypothesis
  • c) Fail to reject the null hypothesis
  • d) Fail to reject the alternative hypothesis

  • 3. 
    A P-value indicates:

  • the probability that the null hypothesis is true
  • the probability that the alternative hypothesis is true
  • the probability of obtaining the results (or one more extreme) if the null hypothesis is true
  • probability of a Type I error

  • 4. 
    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.

  • Ho: p = 0.30      Ha: p > 0.30Ho:\ p\ =\ 0.30\ \ \ \ \ \ Ha:\ p\ >\ 0.30Ho: p = 0.30      Ha: p > 0.30
  • Ho: p = 0.30    Ha:  p < 0.30Ho:\ p\ =\ 0.30\ \ \ \ Ha:\ \ p\ <\ 0.30Ho: p = 0.30    Ha:  p < 0.30
  • Ho: p =0.30    Ha: p ≠ 0.30Ho:\ p\ =0.30\ \ \ \ Ha:\ p\ \ne\ 0.30Ho: p =0.30    Ha: p ​= 0.30

  • 5. 
    In a research report, the term "significant" is used when the null hypothesis is rejected.

  • True
  • False

  • 6. 
    When performing a test about the population proportion, what distribution would you need to use?

  • z
  • t
  • chi-square

  • 7. 
    Identify the correct null hypothesis:Is the proportion of babies born male different from 50%? In a sample of 200 babies, 96 were male. Test the claim using a level of significance of 1%.

  • H0: p = 0.50
  • H0: µ = 100
  • H0: p = 0.48
  • H0: µ = 96

  • 8. 
    If no alpha level is given, what alpha level is assumed?

  • 0.01
  • 0.05
  • 0.10
  • 0.25

  • 9. 
    When determining the conclusion of a hypothesis test with alpha = 5%, which of the following is true?

  • If the p-value is less than 5%, then we fail to reject the null hypothesis.
  • If the p-value is less than 5%, then we reject the null hypothesis.
  • If the p-value is more than 5%, the we reject the null hypothesis.
  • We need more information.

  • 10. 
    Which of the following shows a right-tailed test?

  • Ha: µ < 15
  • H0: µ < 15
  • Ha: µ > 15
  • H0: µ > 15

  • 11. 
    At the Chrysler manufacturing plant, there is a part that is supposed to weigh precisely 19 pounds. The engineers take a sample of parts and want to know if they meet the weight specifications. What are our null and alternative hypotheses?

  • Ho : μ = 17, Ha : μ ≠ 19
  • Ho : μ = 19, Ha : μ ≠ 19
  • Ho : μ = 19, Ha : μ ≠ 17
  • Ho : μ = 17, Ha : μ ≠ 17

  • 12. 
    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

  • 13. 
    The null and alternative hypothesis can be the same.

  • Yes
  • No
  • Maybe
  • All the above
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