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 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 condition for inference met, a hypothesis test conducted at the significance level a = 0.05 resulted in a p-value of 0.381. Which of the following is an appropriate conclusion? The director has convincing statistical evidence to conclude that the population mean commute time is greater than 30 minutes. 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 mean commute time is greater than 30 minutes. The director does not have convincing statistical evidence to conclude that the population mean commute time is less than 30 minutes.

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 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 condition for inference met, a hypothesis test conducted at the significance level a = 0.05 resulted in a p-value of 0.381. Which of the following is an appropriate conclusion? The director has convincing statistical evidence to conclude that the population mean commute time is greater than 30 minutes. 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 mean commute time is greater than 30 minutes. The director does not have convincing statistical evidence to conclude that the population mean commute time is less than 30 minutes.

Name: In a certain city, the population mean commute time to work was repor
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: 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 forthe company's employees was greater than 30 minutes. The direc

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

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 α=0.05α=0.05 resulted in a pp-value of 0.381. Which of the following is an appropriate conclusion? The director has convincing statistical evidence to conclude that the population mean commute time is greater than 30 minutes. A The director has convincing statistical evidence to conclude that the population mean commute time is less than 30 minutes. B The director has convincing statistical evidence to conclude that the population mean commute time is 31.4 minutes. C The director does not have convincing…
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 α=0.05α=0.05 resulted in a pp-value of 0.381. Which of the following is an appropriate conclusion? The director has convincing statistical evidence to conclude that the population mean commute time is greater than 30 minutes. 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. The director does not have convincing statistical evidence to…
Historically, the time spent by DCSI3710 students on trying to certify any HLS homework is known to have a mean of 35 minutes. In order to examine the claim that homework 12.2 was actually more time-consuming, an instructor asked 16 students how much time they spent on it. Assume that the p-value associated with the test statistic is 0.03. At a significance level of 0.01, what is the conclusion of the hypothesis test?
A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered. Does this provide compelling evidence for concluding that more than 10% ofplates blister under such circumstances?A) State H0 and Ha B) Test the hypothesis using the P-Value approach at a significance level of 4.5%, and express your decision. C) Based on the given data, determine the extreme value without rejecting the H0.
Use the pulse rates in beats per minute (bpm) of a random sample of adult females listed in the data set available below to test the claim that the mean is less than 67bpm. Use a 0.01 significance level. Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? A. H0:μ>67bpm H1:μ<67bpm B. H0:μ=67bpm H1:μ<67bpm C. H0:μ=67bpm H1:μ>67bpm D. H0:μ=67bpm H1:μ≠67bpm Determine the test statistic. ______________ (Round to two decimal places as needed.) Determine the P-value. ______________ (Round to three decimal places as needed.) State the final conclusion that addresses the original claim. (1) ______________H0. There is (2) ____________evidence to conclude that the mean of the population of pulse rates for adult females is (3) ________________67bpm. 1: Pulse Rate Data Pulse Rate (bpm) 94 54 76 40…
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2736 occupants not wearing seat belts, 3131 were killed. Among 7686 occupants wearing seat belts, 18 were killed. Use a 0.01 significance level to test the claim that seat belts are effective in reducing fatalities. Complete parts (a) through (c) below. a. Test the claim using a hypothesis test. Consider the first sample to be the sample of occupants not wearing seat belts and the second sample to be the sample of occupants wearing seat belts. What are the null and alternative hypotheses for the hypothesis test? A. Upper H 0H0: p 1p1greater than or equals≥p 2p2 Upper H 1H1: p 1p1not equals≠p 2p2 B. Upper H 0H0: p 1p1equals=p 2p2 Upper H 1H1: p 1p1not equals≠p 2p2 C. Upper H 0H0: p 1p1equals=p 2p2 Upper H 1H1: p 1p1greater than>p 2p2 D. Upper H 0H0: p 1p1not equals≠p 2p2 Upper H 1H1: p 1p1equals=p 2p2 E. Upper H 0H0: p…
This chart shows the results of two random samples that measured the average number of minutes per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH) rechargeable batteries. Down below shows the hypothesis test using significance level (α) = 0.05 to determine if the true average number of minutes per charge for NiMH batteries is smaller than that for Li-ion batteries. 1. From the data given what would be the correct p value? (the one tail or the two tail?) 2. Find the point estimate (you can do this by subtracting Group 2 Sample Mean from Group 1 Sample Mean.) 3. Find the Lower Bound of the confidence interval by subtracting the Margin of Error from the point estimate. 4. Find the Upper Bound by adding the margin of error to the point estimate. t-Test: Two-Sample Assuming Unequal Variances NiMH Li-ion Mean 89.35714 95 Variance 3.93956 59.75 Observations 14 17 Hypothesized Mean Difference 0 df…
An LED light bulb manufacturer claims that the average lifespan of its 60-watt LED light bulbs is 43,000 hours.A corporate watchdog group is suspicious of the company's claim and thinks that the true average lifespan of the 60-watt LED light bulbs produced by the company may be less than the advertised 43,000 hours. The group collected and tested a random sample of 240 light bulbs and found the average lifespan of the sample was 42,958 hours.Use the p-value method to test the hypothesis that the mean lifespan of this brand of 60-watt LED light bulb is less than 43,000 hours, using α=0.025α=0.025. Assume the standard deviation of the lifespan of all such light bulbs is known to be 430 hours.State the null and alternative hypothesis for this test.H0:H0: H1:H1: Determine if this test is left-tailed, right-tailed, or two-tailed. right-tailed two-tailed left-tailed Should the standard normal (zz) distribution or Student's (tt) distribution be used for this…
A well-known brokerage firm executive claimed that at least 90% of investors are currently confident of meeting their investment goals. An XYZ Investor Optimism Survey, conducted over a two week period, found that in a sample of 800 people, 88% of them said they are confident of meeting their goals. What practical conclusion can we make about the claim? What would be our formal conclusion if we used a 0.01 significance level?
A researcher was interested in the relationship between a swimmer’s hand length and corresponding time to complete the 100-meter freestyle. The researcher selected a random sample of twenty swimmers from all participants in a swim competition. Assuming all conditions for inference are met, which of the following significance tests should be used to investigate whether there is convincing evidence, at a 5 percent level of significance, that a longer hand length is associated with a decrease in the time to complete the 100-meter freestyle?
A market research study hopes to determine if the average sales of house entertainment units will increase in a test market with the introduction of a new package. Sales recorded in a 32-day period for the old package and a 30-day period for the new package were as follows: What can be concluded at 2.5% significance level? Use the Ten Step Process. Level of Significance:___________________________________________________ Test Statistic:_________________________________________________________ Formula:_____________________________________________________________
A company makes a device that can be fitted to car engines to improve their fuel efficiency. The company asserts that when the device is installed drivers should experience a mean increase of more than 3kilometres per litre. Assuming that the population standard deviation of increase is known to be 0.75kilomtres per litre and a sample size of 64 cars is selected with a mean of 3.25kilometres per litre, use the p-value approach to test the null hypothesis using a significance level of 0.05.