Based on a random sample of size 43, a 93% confidence interval for μ was found to be (24.6, 28.38). This interval will be used to test the following hypotheses:Ho:= 22.3Ha: 22.3(a) What is the conclusion?Do not reject the null hypothesis. 22.3 is in the interval, and therefore is one of the plausible values for μ, according to this confidence interval.Reject the null hypothesis. 22.3 is not in the interval, and therefore is not one of the plausible values for μ, according to this confidence interval.Do not reject the null hypothesis. 22.3 is not in the interval, and therefore is not one of the plausible values for μ, according to this confidence interval.O Reject the null hypothesis. 22.3 is in the interval, and therefore is one of the plausible values for μ, according to this confidence interval.(b) What is the significance level of the test?(2 decimal places)(c) How many degrees of freedom are associated with this confidence interval?(whole number)

Answered: Image /qna-images/answer/ffe7c560-cc55-418a-815b-7b402c9291c0.jpg

Answered: Based on a random sample of size 43, a…

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 sample of 1100 computer chips revealed that 25% of the chips fail in the first 1000 hours of their use. The company's promotional literature claimed that 28% fail in the first 1000 hours of their use. Is there sufficient evidence at the 0.10 level to dispute the company's claim? State the null and alternative hypotheses for the above scenario. Answer Ho Ha Tables Keypad Keyboard Shortcuts
If the results of the test with the following hypotheses are statistically significant, we have found evidence that: Hypotheses: Ho :H1 = H2 Ha:H1>H2 Hi = H2 X1H2 X1 # X2 X1>X2 Hi
You are conducting a study to see if the proportion of voters who prefer the Democratic candidate is significantly smaller than 65% at a level of significance of αα = 0.01. According to your sample, 37 out of 59 potential voters prefer the Democratic candidate. For this study, we should use The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.) The p-value is αα Based on this, we should the null hypothesis. Thus, the final conclusion is that ... The data suggest the population proportion is not significantly smaller than 65% at αα = 0.01, so there is sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is equal to 65%. The data suggest the populaton proportion is significantly smaller than 65% at αα = 0.01, so…
Only 11% of registered voters voted in the last election. Will voter participation increase for the upcoming election? Of the 390 randomly selected registered voters surveyed, 55 of them will vote in the upcoming election. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?VSelect an answer (please enter a decimal) H1: ?v Select an answer (Please enter a decimal) c. The test statistic ? (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?v a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... ) the null hypothesis. O The data suggest the populaton proportion is significantly higher than 11% at a = 0.01, so there is statistically significant evidence to conclude that the the percentage of all registered voters who will vote in the upcoming election will be higher…
A 95% confidence interval for u was given as -5.65 < u < 2.61. What would a test for Ho : µ = 0 vs H1 : µ # 0 conclude? A. reject the null hypothesis at a = 0.05 and all smaller a B. fail to reject the null hypothesis at a = = 0.05 and all smaller a C. reject the null hypothesis at a = 0.05 and all larger a D. fail to reject the null hypothesis at a = - 0.05 and all larger
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If n=16, ¯xx¯(x-bar)=35, and s=17, construct a confidence interval at a 80% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place. I used the formula 35-NORM.INV(1-2.0/2,0,1)*((17)/SQRT(16)) for the lower and the same but with a plus sign for the upper, I got it wrong and dont understand why. We have to use Excel so please explain what excel formula to use.
6
The results of a hypothesis test are reported as follows in a scientific report: t(38) = -3.13, p < .05. Based on this information, which statement below is not correct? The sample size was n = 39. The conclusion reached by the researcher was to reject the null hypothesis. The sample mean was greater than the hypothesized population mean. The probability of a Type I error is less than 5%.
4. With a sample of n = 11 participants, the repeated-measures t statistic has df = 10, M, = -4, SMb = 0.887 at two-tailed hypothesis testing. Compute for the confidence interval with 99% confidence. Show your solution. ( - %3D
Find the P-value for a left-tailed hypothesis test with a test statistic of Z=−1.65. Decide whether to reject H0 if the level of significance is α=0.05 P-value= (Round to four decimal places as needed.)
A police office claims that the proportion of people wearing seat belts is less than 65%. To test this claim, a random sample of 200 drivers is taken and its determined that 126 people are wearing seat belts. The following is the setup for this hypothesis test: Ho :p-0.65 Ha : p < 0.65 In this example, the p-value was determined to be 0.277 come to a conclusion and interpret the results for this hypothesis test for a proportion (use a significance level of 5%) Select the correct answer below: O The decision is to reject the Null Hypothesis. The conclusion is that there is enough evidence to support the claim The decision is to fail to reject the Null Hypothesis. The conclusion is that there is not enough evidence to support the claim

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