The test statistic of z = 1.89 is obtained when testing the claim that p> 0.2. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.01, should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. This is a test. right-tailed left-tailed two-tailed

The test statistic of z = 1.89 is obtained when testing the claim that p> 0.2. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.01, should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. This is a test. right-tailed left-tailed two-tailed

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a 0.05 significance level to test the claim that the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the background color appear to have an effect on the variation of word recall scores? Red Background Blue Background What are the null and alternative hypotheses? OA H₂:0²=0²₂2 H₁: 0²1 20²2 n X S 34 15.35 5.94 37 12.49 5.43 *C. H₂:0² = 0²/ c. H₁:0² #0²/2 Identify the test statistic. F = (Round to two decimal places as needed.) *** B. H₂:0² = 0² H₁:0² <0² OD. H₂:0² #0²/2 H₁:0² = 0²
A manufacturer of MP3 players conducts a set of comprehensive tests on the electrical functions of its product. All MP3 players must pass all tests prior to being sold. Of a random sample of 700 MP3 players, 28 failed one or more tests. Find a 90% confidence interval for the proportion of MP3 players from the population that pass all tests. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. The 90% confidence interval is
The test statistic of z = 2.16 is obtained when testing the claim that p 0.226. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.01, should we reject Ho or should we fail to reject Hn? Click here to view page 1 of the standard normal distribution table, Click here to view page 2 of the standard normal distribution table. a. This is a V test. b. P-value = (Round to three decimal places as needed.) c. Choose the correct conclusion below. O A. Fail to reject Ho. There is sufficient evidence to support the claim that p# 0.226. O B. Fail to reject Ho. There is not sufficient evidence to support the claim that p#0.226. OC. Reject Ho. There is sufficient evidence to support the claim that p# 0.226. O D. Reject Ho. There s not sufficient evidence to support the claim that p#0.226.
K The test statistic of z= 1.51 is obtained when testing the claim that p>0.2. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of a = 0.01, should we reject H, or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. 7 a. This is a b. P-value = c. Choose the correct conclusion below. S z 7 s 1 mand 1 OA. Reject Ho. There is not sufficient evidence to support the claim that p>0.2. OB. Fail to reject Ho. There is sufficient evidence to support the claim that p>0.2. OC. Reject Ho. There is sufficient evidence to support the claim that p>0.2. OD. Fail to reject Ho. There is not sufficient evidence to support the claim that p>0.2. w H test. 5 (Round to three decimal places as needed.) TEL ZOE D C 1 1:1 4 R F I V % 5 1 T G A 6 B MacBook Air | 9 || Lu I N H J 8 Standard Normal Distribution Table…
The test statistic of z = 1.48 is obtained when testing the claim that p > 0.2. a. Identify the hypothesis test as being two-tailed, left-tailed, or right-tailed. b. Find the P-value. c. Using a significance level of α = 0.01, should we reject Ho or should we fail to reject Ho? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. a. This is a right-tailed test. b. P-value = (Round to three decimal places as needed.)
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If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT = - 1.61? Click here to view page 1 of the cumulative standardized nomal distribution table. Click here to view page 2 of the cumulative standardized normal distribution table. C..... Determine the decision rule. Select the correct choice below and fill in the answer box(es) within your choice. (Round to two decimal places as needed.) A Reject Ho if ZSTAT - 1.96 or ZSTAT> + 1.96 OB. Reject Ho if ZSTAT> OC. Reject Ho
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Use a one sample z-test to determine whether or not a sample mean of 34 differs from the population mean of 30 when the population standard deviation is 5 (assume N = 15). Use a two-tailed test of significance with an a = 0.05. Write a summary statement (since no IV or DV are given, just use the terms IV and DV generically):
Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a 0.05 significance level to test the claim that the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the background color appear to have an effect on the variation of word recall scores? n x s Red Background 35 15.86 5.95 Blue Background 37 12.11 5.43 What are the null and alternative hypotheses? what is the test statistic? (F =?) what is the P-value? does the background color appear to have an effect on the variation of word recall scores?
If you use a 0.06 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting Hg: u = 15.2 if you use the Z test? Click here to view page 1 of the cumulative standardized normal distribution table. Click here to view page 2 of the cumulative standardized normal distribution table. Which of the following decision rules is correct? O A. Reject H, if – 1.88 1.88. O C. Reject H, if ZSTAT - 1.555 or ZSTAT> 1.555. O D. Reject H, if - 1.555 < ZSTAT < 1.555.
A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations n are equal. Complete parts (a) and (b) below. Use a 0.10 significance level for both parts. What are the null and alternative hypotheses? OA. Ho: H₁ H₂ H₁: Hy #H₂ OC. Ho: H₁ H₂2 H₁: Hy > H₂ (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) The test statistic, t, is ← OB. Ho: H₁