HomeworkLib
Question

Which of the following statements is not correct for an F-distribution? A. Exact shape of the...

Which of the following statements is not correct for an F-distribution?
A. Exact shape of the distribution is determined by two numbers of degrees of freedom
B. Variables that are F-distributed range from 0 to 100
C. Degrees of freedom for the numerator can be larger, smaller, or equal to the degrees of freedom for the denominator.
D. Degrees of freedom for the denominator are always smaller than the degrees of freedom for the numerator

In testing the difference between two population means using two independent samples, the sampling distribution of the sample mean difference ?¯1−?¯2x¯1−x¯2 is normal if the:
A. populations are non-normal and the sample sizes are large
B. sample sizes are both greater than 30
C. populations are normal
D. all of the above are required conditions

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

(1)

The following statements are not correct for an F-distribution

B. Variables that are F-distributed range from 0 to 100

D. Degrees of freedom for the denominator is always smaller than the degrees of freedom for the numerator

(2)

In testing the difference between two population means using two independent samples, the sampling distribution of the sample mean difference ?¯1−?¯2x¯1−x¯2 is normal if the:

The correct answer is Option D D. all of the above are required conditions

A. populations are non-normal and the sample sizes are large.

If the sample size is size, then we will use CLT(Central Limit Theorem).


B. sample sizes are both greater than 30

C. populations are normal

D. all of the above are required conditions

0 0
Add a comment
Know the answer?
Add Answer to:
Which of the following statements is not correct for an F-distribution? A. Exact shape of the...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • The shape of which distribution is not controlled by the degrees of freedom? F t Which...

    The shape of which distribution is not controlled by the degrees of freedom? F t Which of the following accurately represents characteristics of the x2 distribution? There may be more than one correct answer, select all that are correct. The degrees of freedom for a Chi-square test of independence are k-1. As the degrees of freedom increase, the critical value of the chi-square distribution becomes larger. | It can assume both negative and positive values. The Chi-square goodness-of-fit test is...

  • Which of the following is true about the sampling distribution of means? Shape of the sampling...

    Which of the following is true about the sampling distribution of means? Shape of the sampling distribution of means is always the same shape as the population distribution, no matter what the sample size is. Sampling distribution of the mean is always right skewed since means cannot be smaller than 0. Sampling distributions of means are always nearly normal. Sampling distributions of means get closer to normality as the sample size increases.

  • Which of the following is true about the sampling distribution of means? Shape of the sampling...

    Which of the following is true about the sampling distribution of means? Shape of the sampling distribution of means is always the same shape as the population distribution, no matter what the sample size is. Sampling distribution of the mean is always right skewed since means cannot be smaller than 0. Sampling distributions of means are always nearly normal. Sampling distributions of means get closer to normality as the sample size increases.

  • The F ratio in a completely randomized ANOVA is the ratio of a. MSTR MSE b....

    The F ratio in a completely randomized ANOVA is the ratio of a. MSTR MSE b. MST/MSE c. MSE/MSTR d. MSE/MST Answer: The critical F value with 6 numerator and 60 denominator degrees of freedom at 0 .05 is a. 3.74 b. 2.25 c. 2.37 d. 1.96 Answer: The ANOVA procedure is a statistical approach for determining whether or not a. the means of two samples are equal b. the means of two or more samples are equal c. the...

  • Chapter 6, Section 4-D, Exercise 184 Use a t-distribution to answer this question. Assume the samples...

    Chapter 6, Section 4-D, Exercise 184 Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t-statistic will be used for inference about the difference in sample means. State the degrees of freedom used. Find the endpoints of the-distribution with 2.5% beyond them in each tail if the samples have sizes ni-17 and n2-27. Enter the exact answer for the degrees of freedom and round your answer...

  • Suppose that a One-way ANOVA is being performed to compare the means of 4 populations and...

    Suppose that a One-way ANOVA is being performed to compare the means of 4 populations and that the sample sizes are 15, 17, 20, and 14. Determine the degrees of freedom for the F-statistic. (a) the degree of freedom of the numerator (b) the degree of freedom of the denominator

  • Question 3 View Policies Current Attempt in Progress Use a t-distribution to answer this question. Assume...

    Question 3 View Policies Current Attempt in Progress Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t- statistic will be used for inference about the difference in sample means. State the degrees of freedom used Find the endpoints of the t-distribution with 2.5% beyond them in each tail if the samples have sizes ni = 13 and 2-22. Enter the exact answer for the degrees...

  • View Policies Current Attempt in Progress Use a t-distribution to answer this question. Assume the samples...

    View Policies Current Attempt in Progress Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t-statistic will be used for inference about the difference in sample means. State the degrees of freedom used. Find the proportion in at-distribution less than - 1.4 if the samples have sizes n 1 = 30 and n 2 - 40. Enter the exact answer for the degrees of freedom and...

  • Use technology to create sampling distributions for a uniform population distribution. Complete parts a through d...

    Use technology to create sampling distributions for a uniform population distribution. Complete parts a through d below. Population Distribution a. Use technology to create a sampling distribution for the sample mean using sample sizes n=2. Take N=5000 repeated samples of size 2, and observe the histogram of the sample means. What shape does this sampling distribution have? O A. The sampling distribution is triangular. OB. The sampling distribution is normal. OC. The sampling distribution is uniform. OD. The sampling distribution...

  • Determine if the following statements are true or false, and explain your reasoning for statements you...

    Determine if the following statements are true or false, and explain your reasoning for statements you identify as false. (a) When comparing means of two samples where n1 = 20 and n2 = 40, we can use the normal model for the difference in means since n2 ? 30. (b) As the degrees of freedom increases, the T distribution approaches normality. (c) We use a pooled standard error for calculating the standard error of the difference between means when sample...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT