· A company wishes to test if the new software system installed improved the mean waiting timefor a customer to talk to a service representative to less than 120 seconds. Is the following thecorrect hypothesis to test for this problem?H X =120H: X <120O Yes, this hypothesis is the correct one to testO No, this hypothesis is incorrectly written

The hypothesis testing process would involve collecting a sample of waiting times, calculating the…

Answered: • A company wishes to test if the new…

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 individual can take either a scenic route to work or a non-scenic route. She decides that use of the non-scenic route can be justified only if it reduces the mean travel time by more than 9 minutes. (a) If ?1 refers to the mean travel time for the non-scenic route and ?2 to the mean travel time for the scenic route, what hypotheses should be tested? ?1 − ?2 = −9 ?1 − ?2 < −9 ?1 − ?2 < −9 ?1 − ?2 > −9 ?1 − ?2 =−9 ?1 − ?2 ≠ −9 ?1 − ?2 = 9 ?1 − ?2 < 9 ?1 − ?2 = 9?1 − ?2 > 9 B) If ?1 refers to the mean travel time for the scenic route and ?2 to the mean travel time for the non-scenic route, what hypotheses should be tested? ?1 − ?2 = −9?1 − ?2 < −9 ?1 − ?2 = −9?1 − ?2 > −9 ?1 − ?2 = −9?1 − ?2 ≠ −9 ?1 − ?2 = 9?1 − ?2 < 9 ?1 − ?2 = 9?1 − ?2 > 9
Need help writing a null hypothesis for the bivariate relationship shown in the SPSS output.
The results section of an article reports the following “IQ scores of the sample differ from the population mean of 100, single sample t (19) = 2.80, p < .05, two tail”. Based on this result, how many people were included in the sample? Select one: 20 21 19 38
Solve
The manufacturer of Lakas Papaya cleansing soap claimed that their product was effective in making the facial skin blemish-free of at least 93% of users who tested it for a period of 1 week. In a sample of 350 people who had problems with their facial skin, the soap provided blemish-free skin for 295 people. Which of the following represents the alternative hypothesis for this problem? A. Ha: p = 0.93B. Ha: p < 0.93C. Ha: p > 0.93D. H_a: p ≠ 0.93
Your medical research team is investigating the mean cost of a 30-day supply of a certain heart medication. A pharmaceutical company thinks that the mean cost is more than $64. You want to support this claim. How would you write the null and alternative hypotheses? Ho H3:
Write the null and hypothesis for this test.
For this hypothesis test do you think the results would have been different if the values had first been separated by the gender of the subject? For example, if instead you tested the claim that the mean weight of the population of all male adults is greater than 80 kg. Explain your answer.
help
Week 9 – Hypothesis Testing oExamples of null and alternative hypotheses that are one and two sided, explaining how to distinguish between them. oExamples of z-test for proportion, z-test for mean, t-test for mean with explanations of when you use each one and why, with computations. oInterpretations of p-values for each of the above with context
For the given scenario, determine the type of error that was made if any.(begin by determining the null and alternative hypothesis). A new whitening toothpaste advertises for shades as the mean number of shades the toothpaste whitens your teeth. One user claims that the mean number of shades the toothpaste whitens your teeth is different from four shades. The user conducts a hypothesis test and fails to reject the null hypothesis. Assume that in reality, the mean number of shades the two piece white is your teeth is for shade. Was an error made? If so, what type? A, B, C? A.Yes; type 2 error B.Yes; type 1 error C.No; correct decision
Please no written by hand solution and no img . Pairs of hypotheses about a claim (a statistic of the population, like its mean, μ) include the following: (A) H0: μ ³ k and Ha: μ < k, where k is some value (B) H0: μ = k and Ha: μ ≠ k, where k is some value (C) H0: μ > k and Ha: μ £ k, where k is some value (D) H0: μ £ k and Ha: μ > k, where k is some value (E) H0: μ < k and Ha: μ ³ k, where k is some value

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