QUESTION 15A sample poll of 300 voters from district A and 200 voters from distriet B showed that 58% and 48% respectively were in favor of a glvencandidate. At a level of significance of O.05, we consider testing of the hypothesis that there is a difference between the district. Lel p1 andp2 danota the proportions from all volers of districts A and B respectively who are in favor of the candidate.a. Is this a one-tailed or two-talled test?b. The alternative hypothesis isc. The crilical value isd. The test slatistic is (round to two decimal places)e. Since the test statistic is( less Imore) than the critical value, we (rejec/do not reject)the null hypcthesis.

Test is that whether there is a difference in proportion of voters in districts A and B who are in…

Answered: .Is this a one-tailed or two-talled…

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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A manufacturer must test that his bolts are 4.00 cm long when they come off the assembly line. He must recalibrate his machines if the bolts are too long or too short. After sampling 121 randomly selected bolts off the assembly line, he calculates the sample mean to be 4.21 cm. He knows that the population standard deviation is 0.83 cm. Assuming a level of significance of 0.02, is there sufficient evidence to show that the manufacturer needs to recalibrate the machines? Step 3 of 3: Draw a conclusion and interpret the decision.
In general, men have greater income than women. So, a researcher hypothesizes that men’s occupational prestige scores on average should be significantly higher than women’s. The following table shows the OPS by gender. The researcher wants to test the hypothesis at the .05 level. The estimated standard error of the difference between means is 1.0. Is it going to be a one-tailed test, or a two-tailed test? A. One-tailed test B. Two-tailed test
Imagine you are doing a Related-Samples t-test, and you are on Step Two of the hypothesis test. The sample of difference scores that you calculated is -1, -1, -3, +2, 0, -4. If you are doing the test with α = .01, and two tails, what would he correct t-critical be?
Looking at youth depression scores from a general sample of random children in the US, we want to determine if our sample is significantly different than the national average of scores of children with depression in the US. The national average of scores on a measure of depression is 5 points. We have no reason to assume it will be higher or lower than the US national average. The sample: 11 9 12 3 3 4 13 1. What is the null and alternative hypotheses? Do not specify any directionality. 2. What did you discover (using 95% Cl)? Provide an interpretation.
Bocellie rejected a null hypothesis. The reason for doing this is that the hypothesis required a right-tailed test and the t value was 2.5 whereas the t critical value was 2. Which of the following are we certain about: Both Type I and Type II error were made A Type II error was not made Neither Type I nor Type II error was made A Type I error was not made
Answer the following to summarize the test of the hypothesis that there is no dependence between the two variables color vision of participant and trial outcome. For your test, use the 0.05 level of significance. a. Find the value of the test statistic. (Round to two or more decimal places.) b. Find the critical value for a test at the 0.05 level of significance. (Round to two or more decimal places.) c. Can we reject the hypothesis that there is no dependence between the variables color vision of participant and trial outcome? Use the 0.05 level of significance.
An elementary school claims the variation in reading scores of its fourth grade students is less than o = 3. 25. Determine whether the hypothesis for this claim is left-tailed, right-tailed, or two-tailed. left-tailed right-tailed two-tailed
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.Is this a one-tailed or two-talled test The alternative hypothesis is The critical value is