Question

What is the critical value of t for a two tailed test for a sample of...

What is the critical value of t for a two tailed test for a sample of 43 participants if the alpha is set at .05

a 2.021

b 2.247

c 1.711

d 2.145

A professor wants to know if her introductory statistics class has a good grasp of basic math at the start of the semester. Six students are chosen at random from the class and given a math proficiency test. The professor wants the class as a whole to be able to score above 70 on the test. The six students get scores of 62, 92, 75, 68, 83, and 95. The professor has 90 percent confidence that the mean score for the class on the test would be above 70?

T or F

What is the critical value of t for a one tailed test for a sample of 10 participants if the alpha is set at .05

a 1.8333

b 2.021

c 1.711

d 2.145

What is the critical value of t for a one tailed test for a sample of 25 participants if the alpha is set at .05

a .677

b 1.711

c 2.357

d  2.145

Homework Answers

Answer #1

Solution :

Given that,

sample size = n = 43

Degrees of freedom = df = n - 1 = 43 - 1 = 42

= 0.05

/ 2 = 0.05 / 2 = 0.025

t /2,df = t0.025,42 = 2.021

Critical value = 2.021

T

sample size = n = 10

Degrees of freedom = df = n - 1 = 10 - 1 = 9

= 0.05

t ,df = t0.05,9 = 1.8333

Critical value = 1.8333

sample size = n = 25

Degrees of freedom = df = n - 1 = 25 - 1 = 24

= 0.05

t ,df = t0.05,24 = 1.711

Critical value = 1.711

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Question 1 The main reason a research uses a t-test instead of a z-test is when...
Question 1 The main reason a research uses a t-test instead of a z-test is when little is known about population (mean and standard deviation). 1) True 2) False Question 2 Values in the t‐table are not actually listed by sample size but by degrees of freedom (df). 1) True 2) False Question 3 A 90 percent confidence level is equivalent to an alpha level of 0.10 1) True 2) False Question 4 A professor wants to know if her...
A professor wants to know if her introductory statistics class has a good grasp of basic...
A professor wants to know if her introductory statistics class has a good grasp of basic math. Six students are chosen at random from the class and given a math proficiency test. The six students score a sample average of 60.83 with a sample standard deviation of 13.17. Can the professor conclude that the mean score for the class on the test would be below 70? Use a significance level of 0.05
Suppose you perform a two-tailed one-sample t-test, using an alpha of .05, on data from 15...
Suppose you perform a two-tailed one-sample t-test, using an alpha of .05, on data from 15 participants. Your obtained value of t is 2.91, and the critical value of t is 2.754. Which of the following is the correct way to report this finding?
Consult the t-table and r-table and indicate the exact critical value of t or r that...
Consult the t-table and r-table and indicate the exact critical value of t or r that you would use for each of the following statistical tests. Pull the exact value out of the table without rounding it. You will need to determine which test each study would use in order to correctly identify each df. a. Depression score data from 15 participants were collected both before and after they each took an antidepressant. You use a two-tailed test t-test with...
t = 2.60, df = 17, alpha = .05, one-tailed critical value of t = Decision...
t = 2.60, df = 17, alpha = .05, one-tailed critical value of t = Decision =
A researcher conducts two t tests. Test 1 is a one-tailed test with a smaller sample...
A researcher conducts two t tests. Test 1 is a one-tailed test with a smaller sample size at a .05 level of significance. Test 2 is a one-tailed test with a larger sample size at a .05 level of significance. What do you know about the critical values for each test?
Assume the computed t-statistic was t0=1.987 Find the t-critical value for a one-tailed test at the...
Assume the computed t-statistic was t0=1.987 Find the t-critical value for a one-tailed test at the 0.05 significance level with 19 degrees of freedom. Is there sufficient evidence to reject the null hypothesis? Find the t-critical value for a one-tailed test at the 0.05 significance level with a sample size of 30. Is there sufficient evidence to reject the null hypothesis? Find the t-critical value for a two-tailed test at the 0.05 significance level with 15 degrees of freedom. Is...
1) Find the critical values t for a left-tailed test -t with alpha=0.99 and n=17 2)...
1) Find the critical values t for a left-tailed test -t with alpha=0.99 and n=17 2) Find the critical values t for a right-tailed test with alpha=0.01 and n=21 3) Find the critical values t and -t for a two-tailed test with alpha=0.05 and n=26
1. You have a two-tailed test. The t critical value is 2.36 and the test statistic...
1. You have a two-tailed test. The t critical value is 2.36 and the test statistic is 3.11. Assume the null hypothesis is true. The result is (a) Type I error (b) Type II error (c) Correct decision 2. You have a right-tailed test. The t critical value is 1.74 and the test statistic is 1.46. Assume the null hypothesis is true. The result is (a)Type I error (b) Type II error (c) Correct decision 3. You have a right-tailed...
1. Calculate the critical degrees of freedom and identify the critical t value for a single-sample...
1. Calculate the critical degrees of freedom and identify the critical t value for a single-sample t test in each of the following situations, using p=.05 for all scenarios. Then, state whether the null hypothesis would fail to be rejected or rejected: a. Two-tailed test, N = 14, t = 2.05, (df= Answer:, critical t = Answer:, Reject or Fail to Reject Ho: Answer: b. One-tailed test, N = 14, t = 2.05, (df= Answer:, critical t = Answer:, Reject...