If, in a sample of n=20 selected from a normal population, X=55 and S=20, what are the critical values of t if the level of significance, α, is 0.05, the null hypothesis, H0, is μ=50, and the alternative hypothesis, H1, is μ≠50? The critical values of t are ± _______. (Round to four decimal places as needed.)

If, in a sample of n=20 selected from a normal population, X=55 and S=20, what are the critical values of t if the level of significance, α, is 0.05, the null hypothesis, H0, is μ=50, and the alternative hypothesis, H1, is μ≠50? The critical values of t are ± _______. (Round to four decimal places as needed.)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Suppose X∼N(μ=2,σ=0.5)X∼N(μ=2,σ=0.5) , then the z-score of x=2.7x=2.7 is choices: 1.4 1.1 1.6 -1.3
This is a 4 part question.
For a population with μ = 80 and σ = 10,the z-score corresponding to X = 85 would be?
6. For a left-tailed test when n = 8 and a = 0.10 the critical value is %3D a. 1.397 b. -1.397 C. 1.415 d. -1.415
Let n₁ = 50, X₁ = 40, n₂ = 50, and X₂ = 20. Complete parts (a) and (b) below. a. At the 0.05 level of significance, is there evidence of a significant difference between the two population proportions? Determine the null and alternative hypotheses. Choose the correct answer below. OA. Ho: ₁2π₂ H₁: π₁ π₂ C. Ho: π₁ #1₂ H1: П1 =П2 Calculate the test statistic, ZSTAT, based on the difference P₁ - P2. The test statistic, ZSTAT, is (Type an integer or a decimal. Round to two decimal places as needed.) Calculate the p-value. O D. Ho: ₁ = π₂ H₁: π₁ #π₂ 퍼 The p-value is. (Type an integer or a decimal. Round to three decimal places as needed.)
4. Let µj denote the mean of population 1 and u2 denote the mean of population 2. Which is the correct statement below concerning the null hypothesis Ho : µ1 – Hz = 5. The mean of population 1 is 4 units less than the mean of population 2. O The mean of population 1 is 5 units greater than the mean of population 2. The mean of population 1 is 5 units less than the mean of population 2. O The mean of population 1 is the same as the mean of population 2.
= A19 Assume we have observed independent samples ₁,..., 5 and y₁,... 13. The sample averages are x = 12.8 and y 11.2, and the population variances are known to be o² = 0.83 and ² = 0.23. Let μ and uy be the population means. We want to perform a z-test for the hypothesis Ho: x=y, with alternative Ho: My. What is the value of the test statistic for this test?
suppose media reports that only 37% of doctors recommend wearing face masks.You suspect this is incorrect, so you sample 66 random doctors and find that 15 of them recommend wearing face masks. State the alternative hypotheses of this test. Alternative Hypothesis (Ha):p = To test our hypothesis, we will assume that p= What is the value of np rounded to 2 decimal places? What is the value of n(1−p) rounded to 2 decimal places? Is the success-failure condition of the Central Limit Theorem satisfied? Yes. Both npnp and n(1−p)n(1-p) are ≥15≥15. No. Either np<15np<15 or n(1−p)<15n(1-p)<15. multiple choice (5)
We test the null hypothesis Ho:μ = 10 against the alternative Ha:μ<10 for a normal population with σ = 4. A random sample of 16 observations is drawn from the population, and we find the sample mean of these observations to be x̅ = 12. The P-value is?
Q1. Which of the following represents Type II error? a. Rejecting the Ho after a test statistic results in a p-value of 0.10 at α =0.05.B. Rejecting the Ho after a test statistic results in a p-value of 0.025 at α=0.05.C. None of the above
50% of students entering four-year colleges receive a degree within six years. Is this percent different from for students who play intramural sports? 117 of the 239 students who played intramural sports received a degree within six years. What can be concluded at the level of significance of αα = 0.05? The null and alternative hypotheses would be: Ho: ? μ p Correct Select an answer = < ≠ > Correct (please enter a decimal) H1: ? p μ Correct Select an answer < ≠ = > Correct (Please enter a decimal) The test statistic ? z t Correct = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)
Let μ denote the true average reaction time to a certain stimulus. For a z test of Ho: μ = 5 vs Ha>5, determine the P-value for each of the following values of the z test statistic. a. 2.29 b. 1.24 c. 1.23 1 d. 1.56 e. -0.14