Od. Ho: H = 2kg vs H₁: ≤2kgQUESTION 44) In testing the claim about the mean annual income of full-time college students is below $15,000, a random sample of 40 students were selected. The sample mean is $14,450 and sample standarddeviation is $2025. Based on an appropriate hypothesis test, what is the correct conclusion at 0.01 significance level?O a. Sample provides sufficient evidence to support the claim that the mean income is below $15,000.O b. Sample does not provides sufficient evidence to support the claim that the mean income is below $15,000.OC. Sample provides sufficient evidence to conclude that that the mean income is at least $15,000.O d. Cannot make a conclusion based on given informationQUESTION 5Click Save and Submit to save and submit. Click Save All Answers to save all answers.82°FMostly cloudy23$%&7*00

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Answered: Od. Ho: = 2kg vs H₁: ≤ 2kg QUESTION 4…

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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An electronics production sequence includes a process where a film of metal is deposited on a board. The film must be more than 1.000 mm thick. If the film is too thin the process fails. The engineer ran a test where the null hypothesis was that the mean thickness was at most 1.000 mm. A sample of 100 boards had a mean thickness of 1.007 mm and a standard deviation of 0.050 mm.At what level of significance would the null hypothesis be rejected? Express your answer at a decimal (not a percent) rounded to three places.
What is the estimated standard error for a paired sample t test using the following data: Standard deviation of the difference score = 5 and n=100?
1 Jump to level 1 A pipes manufacturer makes pipes with a length that is supposed to be 11 inches. A quality control technician sampled 32 pipes and found that the sample mean length was 11.09 inches and the sample standard deviation was 0.2 inches. The technician claims that the mean pipe length is not 11 inches. What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 What is the number of degrees of freedom? Ex: 20 Does sufficient evidence exist at the a= 0.05 significance level to support the technician's claim? Select Check HIN 60°F
Which is cheaper: eating out or dining in? The mean cost of a steak, salad, and rice bought at the grocery store is $13.04. A sample of 30 neighborhood restaurants showed a mean price of $12.15 and a standard deviation of $2 for a comparable restaurant meal. 1.1) Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than $13.04. 1.2) At alpha = 0.05, what is your conclusion? Show a detailed solution to support your conclusion. (Find p-values at: https://www.socscistatistics.com/pvalues/tdistribution.aspx)
Using the data below in a paired sample t test (one tailed), what is the appropriate conclusion? n = 25, Difference score = 1.0, Standard Deviation of Difference score = 2.5 1] Results are not significant. Fail to reject the Null Hypothesis 2] Results are insignficant. Reject the Null Hypothesis 3] Results are significant. Reject the Null Hypothesis 4] Not enough data to run a paired samples t test
A random sample of 15 hourly wages for restaurant servers (including tips) was drawn from a normal population. The sample mean and sample standard deviation were $14.9 and $6.75 respectevely.Can we infer at the 5% significance level that the mean wage for restaurant servers (including tips) is greater than 12?
In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Internet in a typical week. The mean of the sample observations was 12.8 hours. (a) The sample standard deviation was not reported, but suppose that it was 6 hours. Carry out a hypothesis test with a significance level of 0.05 to decide if there is convincing evidence that the mean time spent using the Internet by Canadians is greater than 12.6 hours. (Use a statistical computer package to calculate the P-value. Round your test statistic to two decimal places and your P-value to four decimal places.) t=P-value= State the conclusion in the problem context. Reject H0. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours.Do not reject H0. We have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.6 hours. Reject H0. We do not have convincing…
Based on information from the Statistical Forum, the population mean daily cost of operating a car is $ 18. A random sample of 26 students who own cars found a sample mean operating cost per day of $17.30. The population standard deviation is known and its value is $3.2. Test the alternative hypothesis that the population mean daily cost of operating a car for all students is lower than the national population average of $18. Use the 1% level of significance. 1) Specify the null and the alternative hypotheses. 2) Compute the Sample Test Statistic for this hypothesis test. 3) Find the p-value for this hypothesis test. 4) What is the decision for this hypothesis test.
Suppose a recent study of Trucks and SUVs gave an average fuel efficiency of 19.2 mpg for Trucks and 21.4 mpg for SUVs. The sample standard deviation for Trucks was 3.2 mpg and 2.8 mpg for SUVs. These results were based on samples of 35 Trucks and 39 SUVs. At the 1% significance level, can we conclude that, on average, SUVs have better fuel efficiency than Trucks? Clearly state the null and alternative hypotheses, use the critical value approach (draw a detailed picture), and write out a detailed conclusion. Organize: Hypotheses: Detailed picture: Detailed conclusion:
suppotrt which is cheaper: eating out or dining in? The mean cost of a flank steak, broccoli and rice bought at the grocery store is $ 13.04 (Money, msn website, November 7, 2012).A sample of 100 neighborhood restaurants showed a mean price of $12.75 and a standard deviation of $2 for a comparable restaurant meal. Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than the fixing a comparable meal at home. Using the sample from the 100 restaurants, what is the p-value? At α=.05, what is your conclusion? Repeat the preceding hypothesis test using the critical value approach? P287 Q37 The U.S Bureau of labor statistics report that 11.3% of U.S workers belong unions (BLS website January 2014) .suppose a sample of 400 U.S workers is collected in 2014 to determine whether union efforts to organize have increased union membership. Formulate the hypotheses that can be used to determine…
1. A random sample of 12 kindergarten students yielded a mean weight of 26kg with sample standard deviation of 4.5 kg. Construct a 99% confidence interval for the mean weight of all kindergarten students.

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