Statistics

PLEASE CHECK AND SEE IF I HAVE THESE ANSWERS CORRECT.


T F 1. Hypothesis testing is a procedure based on sample evidence and probability theory to decide whether the hypothesis is a reasonable statement.

ANSWER (True)


T F 2. For a one-tailed test using the 0.05 level of significance, the critical value for the z test is 1.645, but for t it is 1.96.
ANSWER (True)


T F 3. An alternate hypothesis is a statement about a population parameter that is accepted when the null hypothesis is rejected.
ANSWER (False)

T F 4. Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. A manufacturer of spark plugs claims that its plugs have an average life in excess of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles, the sample standard deviation was 1,500 miles and the computed t = 3.677. Based on these findings, there is enough evidence to accept the manufacturer's claim at the 0.05 level.
ANSWER (True)


T F 5. The region or area of rejection defines the location of all those values that are so large or so small that the probability of their occurrence under a true null hypothesis is rather remote.
ANSWER (True)

T F 6. If the null hypothesis is ƒÝ„d 200 and the alternate hypothesis states that ƒÝ is less than 200, then, a two-tail test is being conducted. (ANSWER (False)

T F 7. If we do not reject the null hypothesis based on sample evidence, we have proven beyond doubt that the null hypothesis is true. ANSWER(True)

T F 8. The null hypothesis is rejected when a p-value is greater than a stated significance level.
ANSWER (True)

9. Which of the following does NOT hold true for the t distribution?
A) Confidence intervals will be wider than for large samples.
B) The region of acceptance will be larger than for large samples.
C) A larger computed t value will be needed to reject the null hypothesis than for large samples using z.
D) There is only one t distribution.

ANSWER (B)
10. Test at the 0.01 level the statement that 55% of those families who plan to purchase a vacation residence in Florida want a condominium. The null hypothesis is ƒà = 0.55 and the alternate is ƒà„j 0.55. A random sample of 400 families who planned to buy a vacation residence revealed that 228 families want a condominium. What decision should be made regarding the null hypothesis?
A) Do not reject it
B) Reject it
C) Cannot accept nor reject it based on the information given
D) None of the above
ANSWER (a)

  1. 👍 0
  2. 👎 0
  3. 👁 276
asked by Susan
  1. What is the level of significance?

    1. 👍 0
    2. 👎 0
    posted by Jenn

Respond to this Question

First Name

Your Response

Similar Questions

  1. statistics

    H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will be performed? A. Two-tail testing of a proportion B. One-tail testing of a proportion C. One-tail testing of a mean D. Two-tail testing of a mean ** I'm stuck

    asked by Jenn on February 23, 2018
  2. Math

    Can someone work this for an example I have tried this one and several others and have not got any of them right. I need an example...please. Consider the following ANOVA experiments. (Give your answers correct to two decimal

    asked by Sue 11 on June 20, 2013
  3. math

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by tracy11 on June 23, 2013
  4. Math Help

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Sue11 on June 20, 2013
  5. statistics

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by tracy on June 23, 2013
  6. math check

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Tracy on June 28, 2013
  7. Statistics Help

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Tracy on June 26, 2013
  8. math

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Tracy on June 29, 2013
  9. Math

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Tracy on June 27, 2013
  10. Statistics

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 =

    asked by Mike on October 30, 2013
  11. math

    any help appreciated on this one, none of us can get it right. Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the

    asked by Glenn D on June 25, 2013

More Similar Questions