We reject the null hypothesis and conclude that there is insufficient evidence at a098 % level of confidence to support the claim that the mean wait time is longer than5.00 minutes.We fail to reject the null hypothesis and conclude that there is sufficient evidence at a98% level of confidence to support the claim that the mean wait time is longer than5.00 minutes.We fail to reject the null hypothesis and conclude that there is insufficient evidence ata 98 % level of confidence to support the claim that the mean wait time is longerthan 5.00 minutes.We reject the null hypothesis and conclude that there is sufficient evidence at a098% level of confidence to support the claim that the mean wait time is longer than5.00 minutes. The board of a major credit card company requires that the mean wait time for customers when they callcustomer service is at most 5.00 minutes. To make sure that the mean wait time is not exceeding therequirement, an assistant manager tracks the wait times of 43 randomly selected calls. The mean waittime was calculated to be 5.79 minutes. Assuming the population standard deviation is 2.06 minutes, isthere sufficient evidence to say that the mean wait time for customers is longer than 5.00 minutes with a98% level of confidence?Step 3 of 3: Draw a conclusion and interpret the decision.

From the 43 randomly selected calls (i.e., sample size n=43), it is inferred that: x¯ (sample mean…

Answered: We reject the null hypothesis and…

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 data set includes data from 400 random tornadoes. The display from technology available below results from using the tornado lengths (miles) to test the claim that the mean tomado length is K greater than 2.6 miles. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. Click the icon to view the display from technology. Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? OA. Ho: H=2.6 miles H₁: #2.6 miles OC. Ho: H=2.6 miles H₁: 2.6 miles OD. Ho: <2.6 miles H₁: μ=2.6 miles
In a certain city, the population mean commute time to work was reported as 30 minutes. The director of human resources for a certain company in the city claimed the mean commute time for the company's employees was greater than 30 minutes. The director surveyed 35 randomly selected employees and found that their mean commute time was 31.4 minutes. With all conditions for inference met, a hypothesis test conducted at the significance level a = 0.05 resulted in a pvalue of 0.381. Which of the following is an appropriate conclusion? A The director has convincing statistical evidence to conclude that the population mean commute time is greater than 30 minutes. в The director has convincing statistical evidence to conclude that the population mean commute time is less than 30 minutes. The director has convincing statistical evidence to conclude that the population mean commute time is 31.4 minutes. D The director does not have convincing statistical evidence to conclude that the population…
A two-tailed test is performed at 95% confidence. The p-value is determined to be 0.0478. The null hypothesis must be rejected should not be rejected could be rejected, depending on the sample size has been designed incorrectly
The test statistic for a two tailed hypothesis test on a sample of 18 is 2.639. Find an interval for which the p-value lies.
A newsletter publisher believes that more than 79% of their readers own a personal computer. Is there sufficient evidence at the 0.02 level to substantiate the publisher's claim? State the null and alternative hypotheses for the above scenario.
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Use either the traditional method or P-value method as indicated. Identify the null and alternative hypotheses, test statistic, critical value(s) or P-value (or range of P-values) as appropriate, and state the final conclusion that addresses the original claim.A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 29 g with a standard deviation of 3.8 g. At the 0.05 significance level, test the claim that the sample comes from a population with a mean weight less than 30 g. Use the traditional method of testing hypotheses
You wish to test the following claim (H) at a significance level of a = 0.05. For the context of this problem, d = 2-1 where the first data set represents a pre-test and the second data set represents a post-test. Ho: Pd = 0 Ha: d < 0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain pre-test and post-test samples for n = 301 subjects. The average difference (post-pre) is d = 2.4 with a standard deviation of the differences of sa = 22.7. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = L What is the P-value for this test? (Report answer accurate to four decimal places.) P-value = The P-value is... O less than (or equal to) a O greater than a This P-value leads to a decision to... O reject the null O accept the null O fail to reject the null
Select the appropriate null and alternative hypothesis for the following research question: Does a different proportion of people enjoy playing video games compared to those who enjoy playing sports? phat1 = proportion of people who live in urban areas that prefer to stream tv/movies phat2 = proportion of people who live in rural areas that prefer to stream tv/movies A. Null Hypothesis: People who live in urban areas prefer to stream their tv/movies less than or equal to people who live in rural areas i.e. phat1 <= phat2 Alternative Hypothesis: People who live in urban areas prefer to stream their tv/movies more than people who live in rural areas i.e. phat1 > phat2 B. Null Hypothesis: People who live in urban areas prefer to stream their tv/movies more than or equal to people who live in rural areas i.e. phat1 >= phat2 Alternative Hypothesis: People who live in urban areas prefer to stream their tv/movies less than people who live in rural areas i.e. phat1 < phat2…
4. In the past, the mean running time for a certain type of cell phone battery has been 19.2 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has increased as a result. The hypotheses are: Họ: u=19.2 hours H1: µ>19.2 hours Explain the meaning of a Type I error. A) Concluding that u> 19.2 hours when in fact u = 19.2 hours B) Concluding that u 19.2 hours C) Concluding that u = D) Concluding that u> 19.2 hours when in fact u> 19.2 hours 19.2 hours when in fact u > 19.2 hours

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