Respond to each as T (true) or F (false). 1. A lower p value suggests stronger evidence against the null hypothesis than a higher p value. 2. If you reject a null hypothesis at a 0.02 level, then you would necessarily reject it at a 0.05 level. 3. Computers will actually do almost all statistical calculations for you in the real world. 4. A hypothesis test is biased in favor of rejecting the null hypothesis.

Respond to each as T (true) or F (false). 1. A lower p value suggests stronger evidence against the null hypothesis than a higher p value. 2. If you reject a null hypothesis at a 0.02 level, then you would necessarily reject it at a 0.05 level. 3. Computers will actually do almost all statistical calculations for you in the real world. 4. A hypothesis test is biased in favor of rejecting the null hypothesis.

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

A refrigerator manufacturer claims that the mean life of its competitor's refrigerators is less than 17 years. You are asked to perform a hypothesis test to test this claim. (a) How would you write the null and alternative hypothesis if you represent the manufacturer and want to support the claim? (b) How would you write the null and alternative hypothesis if you represent the competitor and want to reject the claim? H0: ▼ ▼ 17 Ha: ▼ ▼ 17
The test statistic is t = 1.34, the critical value is t = 2.011. The decision would be to: Reject the null hypothesis or Support the null hypothesis or Retain the null hypothesis or Support the alternative hypothesis.
A scientist studying local lakes claims that there is a linear relationship between a lake’s level of mercury and the lake’s depth. The scientist collected data to test the claim at a significance level of α=0.01. The following hypotheses were tested. H0:β1=0Ha:β1≠0 The test yielded a t-value of 2.7 and a p-value of 0.012. Which of the following is a correct conclusion about the scientist’s claim? The null hypothesis is rejected since 0.012>0.01. There is sufficient evidence to suggest that there is a linear relationship between a lake’s level of mercury and the lake’s depth. A The null hypothesis is not rejected since 0.012>0.01. There is sufficient evidence to suggest that there is a linear relationship between a lake’s level of mercury and the lake’s depth. B The null hypothesis is rejected since 0.012>0.01. There is not sufficient evidence to suggest that there is a linear relationship between a lake’s level of mercury and the lake’s depth.…
The clinical trial for a new drug results in a p-value of 0.045. What decision should the scientists make? A. We accept the alternative hypothesis that the drug does work. B. We reject the null hypothesis that the drug doesn't work. C. We accept the null hypothesis that the drug doesn't work. D. We reject the alternative hypothesis that the drug does work.
t is believed that the percent of convicted felons who have a history of juvenile delinquency is 70%. Isthere evidence to support the claim that the actual percentage is more than 70% if out of 200 convictedfelons, we find that 154 have a history of juvenile delinquency? Set the level of significance at � = 0.05a) Write the null and alternative hypotheses.b) Check the conditions to conduct the hypothesis test for the population proportion.c) Find the z test statistic and the p-value.d) Sketch the z curve indicating the z test statistic and the p-value.e) Should you reject or fail to reject the null hypothesis based on the p-value obtained in the previous part?Why?f) State your conclusion from the test
Larry’s car averages 32 miles per gallon on the highway. He now switches to a new motor oil that is advertised as increasing gas mileage. After driving 3000 highway miles with the new oil, Larry estimates the new gas mileage to be 31.8. We wish to test if the motor oil increased his gas mileage. Which of the following are the appropriate null and alternative hypotheses, letting μ denote his new gas mileage? The null hypothesis is H0: ["", "", "", ""] The alternative hypothesis is Ha:
Albert, Barbara, Chuck, and Dora want to test the hypothesis that two populations have the same mean. Albert is comfortable with alpha = 0.1, Barbara prefers alpha = 0.05, Chuck wants alpha = 0.01, and Dora likes alpha = 0.001. You crunch the data and calculate a p-value of 0.02. Who will reject the hypothesis? Select all that apply. A. Albert B. Barbara C. Chuck D. Dora
A) The p− value is 0.7580. Reject the null hypothesis H0. The social media content associate has sufficient evidence that the average number of social media posts per day that helps to build an audience is different than 3 daily posts. B)The p− value is 0.2420. Reject the null hypothesis H0. The social media content associate has sufficient evidence that the average number of social media posts per day that helps to build an audience is different than 3 daily posts. C)The p− value is 0.7580. Fail to reject the null hypothesis H0. The social media content associate does NOT have sufficient evidence that the average number of social media posts per day that helps to build an audience is different than 3 daily posts. D)The p− value is 0.2420. Fail to reject the null hypothesis H0. The social media content associate does NOT have sufficient evidence that the average number of social media posts per day that helps to build an audience is different than 3 daily posts.
For each of the following claims: Mention what kind of test should be used (one-tail, two-tail) and set up the null and alternate hypothesis. Consider that the critical value is = CV (cv represents a number already retrieved from table, for example 1.96). For each H0, mentioned the acceptance range. The Pastry shop claims that its chocolate cookies have exactly 60% chocolate per cookie. A chemist invents an additive to increase the life of an automobile battery. He claims that now the lifetime of the automobile battery with the additive is more than 24 months. The 50Cents Store claims that their daily profit is at most $1000.
A researcher believes that the average amount of calories consumed daily differs between adult males and adult females between the ages of 25 and 35. Suppose she collected data to test her belief and found a p-value of 0.023. Fill in the information for her hypothesis test below. Fail to reject/reject H0 since a. Fail to reject H0 since p = 0.023 < 0.05 b. Fail to reject H0 since p = 0.05 > 0.023 c. Reject H0 since p = 0.023 < 0.05 d. Reject H0 since p = 0.05 > 0.023
Arsenic-based additives in chicken feed have been banned by the European Union. Ifa restaurant chain finds significant evidence that the mean arsenic level of theirchickens is above 80 ppb (parts per billion), the chain will stop using that supplier ofchicken meat. The hypotheses are: H 0 : µ = 80H 1 : µ > 80 where µ represents the mean arsenic level in all chicken meat from that supplier.Samples from two different suppliers are analyzed, and the resulting p-values aregiven: Sample from Supplier A: p-value is 0.0003Sample from Supplier B: p-value is 0.3500 a) Interpret each p-value in terms of the probability of the results happening byrandom chance. b) Which p-value shows stronger evidence for the alternative hypothesis? c) Which supplier, A or B, should the chain get chickens from in order to avoid toohigh a level of arsenic?
A supplier claims that the true mean electrical resistance of wiring harnesses of a certain model is 30 ohms. A manufacturer that uses this harness wants to test whether this claim is true. Which of the following is the correct pair of hypotheses to use for this hypothesis test? Pick the right answer below by quoting the numbered point. 1. H0:μ=30 and H1:μ≠30 2. H0:μ⩾30 and H1:μ<30 3. H0:μ⩽30 and H1:μ>30 4. H0:μ≠30 and H1:μ=30 5. H0:μ<30 and H1:μ⩾30 6. H0:μ>30 and H1:μ⩽30