Road Transport Department claims that the mean speed of cars on a highway is 114 km/h. An insurance company took a random sample of 21 cars driven on a highway and found that the teststatistic is -22913. Can we accept the Road Transport Department's claim at 5% level of significance? (Hint: o uninown)(a) The correct null hypothesis to illustrate the atbove situation is H, : 4- 114 Choose.m) Choose the correct critical value.Choose.(c) Determine the decision to reject or not to reject the null hypothesis.Choose.(d) Based on your decision in (4), can we accept the daim?Choose

Answered: Image /qna-images/answer/9aef698c-07ac-4e6d-8b70-6822a6c16f33.jpg

Answered: Road Transport Department claims that…

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

According to the American Time Use Survey, the mean number of hours each day Americans age 15 and older spend eating and drinking is 1.22. A researcher wanted to know if Americans age 15 to 19 spent less time eating and drinking. After surveying 50 Americans age 15 to 19 and running the appropriate hypothesis test, she obtained a p-value of 0.0329. 1. State the null and alternative hypothesis this researcher used. 2. This is a -tailed test since.(complete this sentence). 3. Interpret the p-value. 4. Determine and explain what a Type I error would be for this situation. What level of severity is this for this context? (How bad is it if this conclusion is incorrect based on this sample?) 5. According to the same survey, people aged 25 - 54, employed with children spend 1 hour per day eating / drinking. Does this seem accurate for you (depending on your age)?
A food company claims a population mean of 625 calories in their frozen lasagna entrées. A sample of 50 of these entrees were collected for a hypothesis test. The null hypothesis is that the population mean calories is 625. The alternative hypothesis is that the population mean calories is higher than 625. Below are the test results. At the 5% significance level, what is the conclusion of the test? There is not enough evidence to conclude the population mean number of calories in the entrees is more than 625. There is enough evidence to conclude the population mean number of calories in the entrees is more than 625. The mean is 630. The mean is 625.
It is claimed that the average sale at Starbucks is eleven dollars. A random sample of 20 transactions were observed and yeilded a mean of 10.39 dollars. Assuming that o = 2.61 dollars, do we have enough evidence to show that the mean is less than eleven dollars? Use a = 0.01 and use our tables. Select the correct null and alternative hypotheses: OA. Ho: X = 10.39,HA: X 11 OC. Ho μ = 11,HA:μ ‡ 11 OD. Ho X = 10.39,H₁ X > 10.39 10.39 OE. Ho: X = 10.39,HA: X O F. Ho : μ = 11,HA : μ < 11 OG. None of the above Select the type of distribution to be used in this question: A. t-distribution OB. Z-distribution OC. Chi-Square distribution OD. None of the above The rejection region for this test is: OA. (-∞, -1.645) OB. (2.575, ∞) OC. (1.645, ∞) OD. (-∞, -2.575) U (2.575, ∞) OE. (-∞, -2.575) OF. (2.33, ∞) OG. (-∞, -2.33) OH. (-∞, -2.33) U (2.33,00) OI. (-∞, -1.645) U (1.645, ∞) OJ. None of the above Test statistic = The conclusion for this test is: OA. Fail to Reject HA OB. Reject HA OC. Fail to…
IN a random sample of males, it was found that 27 write their left hands and 207 do not. In a random sample of females, it was found that 61 write with their left hands and 469 do not. Use a 0.01 significance level to test the rate of left handedness amounf males is less than that amoung females. Consider the first sample to be the sample of males and the second sample to be the sample of females. what are the null and alternative hypotheses for the hypothesis test?Identify the test satistic.Identify the P Value.What is the conclusion based on the Hypothesis test.The 98% confidence interval is ?
New York is known as “the city that never sleeps.” A random sample of 25 New Yorkers were asked howmuch sleep they get per night. Out of this sample, the man number of hours of sleep was 7.73 hours, with astandard deviation of 0.77 hours.Perform a hypothesis test at the α = 0.05 significance level to determine if this provides sufficient evidencethat the average New Yorkers sleeps less than 8 hours per night. b) State the null and alternative hypotheses symbolically.c) Which test procedure (z- or t-) is appropriate to perform the required hypothesis test? What do weneed to know in order to use this test?d) Compute the value of the test statistic.e) Determine the P-value. Please round your P-value to three decimal places.f) Should you reject the null hypotheses or not?
The weights (lb) of discarded plastic from a sample of households is listed and the summary statistics are n=62, x̅=1.911 lb, and s=1.065 lb. Use a 0.05 significance level to test the claim that the mean weight of discarded plastics from a population of households is greater than 1.800 lb. What null hypothesis can be formulated for this claim?
In CDMX, the population average of the age of pregnant women is 19 years. A sociologist believes that in the city where she lives the average is higher. For this, she selected 72 pregnant women, obtaining a mean of 20.7 years with a standard deviation of 6.3 years. We want to test the research hypothesis with a significance level of 0.05. Choose 1.The correct conclusion2.The correct interpretation Select one: 1.H0 is rejected2. With a confidence level of 95%, it can be ensured that the population mean age of pregnant women is not greater than 19 years in the city of the sociologist. 1.H0 is not rejected2. With a confidence level of 95%, it can be ensured that the population mean age of pregnant women is not greater than 19 years in the city of the sociologist. 1.H0 is not rejected2. It can be ensured, with 95% confidence, that the population mean age of pregnant women is greater than 19 years in the city of the sociologist 1.H0 is rejected2. It can be ensured, with 95% confidence, that…
in a simple randon sample size of 89, there were 40 individuals in the category of interest. It is desired to test -- Ho: P=0.46 vs H1: P<46. Compute the statistic Z
You obtain a sample chi-square test statistic of -5.49. On the basis of this value, you know that (CHOOSE ONE) A) the observed frequencies are higher than the expected frequencies across at least half of the categories. B) you have made a calculation error; chi-square values cannot be negative. C) there is a negative association between your two variables. D) the observed frequencies are lower than the expected frequencies across all categories.
Suppose the nutrition information on the package of Matilde's favorite brand of chips states that a serving size of 28 g equals about 12 chips. That means, on average, each chip should weigh 2.33 g. Matilde decides to test the accuracy of this serving size information. She plans to conduct a one-sample t-test with a significance level of a = 0.05 to test the null hypothesis, Họ: H = 2.33, against the alternative hypothesis, H1: µ ± 2.33, where u is the average weight of a chip. Matilde selects a random sample of unbroken chips to weigh. She does not know the population standard deviation nor the distribution of chip weights, but she has confirmed that her sample does not contain any outliers. The summary statistics for her test are shown in the following table. Sample size Sample mean Sample standard deviation Test statistic Probability value n P-value 60 2.37 0.12 2.367 0.021 Based on these results, complete the following sentences to state the decision and conclusion of the test.…
3. College students claim that the cost of living off-campus is less than the cost of living on campus. To support the claim, 36 college students who stayed off-campus were selected at random and their mean expenditure per day was RM 34 with a standard deviation of RM 4. If the mean expenditure of college students staying on-campus is RM 35, can we accept the claim if we perform the hypothesis testing with a = 0.01.
Answer A, B1, and B2: A. What is the difference between the critical-value method and the p-value method of hypothesis testing? B. Several studies have shown that women with many children are less likely to get ovarian cancer. In a new study, data are collected from 25 women ages 40−49 with ovarian cancer. The mean parity (number of children) of these women is 1.8 with standard deviation 1.2. Suppose the mean number of children among women in the general population in this age group is 2.5. What test can be used to test the hypothesis that women with ovarian cancer have fewer children than women in the general population in the same age group? Perform the test in 2a using the critical-value method.

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS