A politician claims that at least 68% of voters support a decrease in taxes. A group of researchers are trying to show thatthis is not the case. Identify the researchers' null hypothesis, Ho, and the alternative hypothesis, Ha, in terms of theparameter pSelect the correct answer below:O Ho:p s 0.68; Ha: p 0.68O Ho:p < 0.68; Ha: p 2 0.68O Ho:p>0.68; H:p s0.68O Ho: p 2 0.68; Ha: p < 0.68

Given that a politician claims that at least 68% of voters support decrease in taxes.Null hypothesis…

Answered: A politician claims that at least 68%…

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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Researchers are comparing the intelligence levels of incoming freshmen and graduating seniors. Assuming that there is a systematic difference in intelligence levels between the two groups and researchers reject the null hypothesis, they have committed what? Failing to reject the null hypothesis means:
K In a July 2017 report, a research firm stated that 39% of people from a certain region reported being harassed while online. An AP Statistics student decided to conduct her own survey at her high school of 3,260 students. She randomly selected 239 students to be surveyed and 99 of them stated that they had been harassed online. Does her survey suggest that the problem is worse at her school than it is for a typical person in the region? Determine the appropriate hypotheses. Ho P HA P (Type integers or decimals.) The test statistic is z = (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) State your conclusion. Use a = 0.05. the null hypothesis. There sufficient evidence to conclude that the proportion of students in the high school who were harassed while online is the proportion of people from the region being harassed while online.
A health provider saw that 48% of their members received their flu shot in recent years. The health care provider tried a new advertising strategy the following year, and they took a sample of members to test if the proportion who received their flu shot had changed. Determine the null and alternative hypothesis
Suppose that in a random selection of 100 colored candies, 22% of them are blue. The candy company claims that the percentage of blue candies is equal to 28%. Use a 0.01 significance level to test that claim. Identify the null and alternative hypotheses for this test. Choose the correct answer below. A. H0: p≠0.28 H1: p=0.28 B. H0: p=0.28 H1: p>0.28 C. H0: p=0.28 H1: p<0.28 D. H0: p=0.28 H1: p≠0.28 Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is nothing. (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is nothing. (Round to three decimal places as needed.) Identify the conclusion for this hypothesis test. A. Reject H0. There is not sufficient evidence to warrant rejection of the claim that the percentage of blue candies is equal to 28% B. Reject H0.…
3. A claim is made that the proportion of college students who have Netflix accounts is 0.85. Noah believes this claimed value is too high. He is able to survey a random sample of 240 college students, and he finds that the sample proportion who have Netflix accounts is 0.82. Noah proceeds to use this data to conduct a hypothesis test. Based on this information, which one of the following statements is correct? A. The p-value will be smaller than 0.01 but larger than 0. B. The p-value will be between 0.01 and 0.05. C. The p-value will be between 0.05 and 0.10. D. The p-value will be larger than 0.10.
A survey asked 1578 US residents: “Do you think the use of marijuana should be made legal, or not?”. 61% of respondents said it should be made legal. A newscaster said of this story that “a majority of Americans think marijuana should be legalized”. Use hypothesis testing to see if this newscaster’s statement is justified.
Which of the following types of study support external validity? a. A study using non-randomly selected participants b. A study that adds a new independent variable c. A study that is a direct replication d. A failed replication study B is the answer but why adding new independent variable can support external validity? (please type, no hand-writing)
State your conclusion to the hypothesis test. Is achieving a basic skill level in a subject independent to the location of the school? A random sample of students categorized by the location of school and the number achieving basic skills in three subjects is shown in the table. Subject Location of School Reading Math Science Urban 43 42 38 Suburban 63 66 65 Conduct a chi-square test of independence at the 1% significance level to test whether the two variables are independent and state your conclusion. Hint: the test statistic is: χ2=0.30Question 16 options: a. There is not sufficient sample evidence to suggest that skill level in a subject is dependent of location. b. Cannot be determined. c. There is sufficient sample evidence to suggest that skill level in a subject is dependent of location. d. There is sufficient sample evidence to suggest that skill level in a subject is independent of location. e. There is not sufficient sample evidence to suggest that skill level…
Which of these is NOT considered one of the traditional results of hypothesis testing reported in a research paper? a. degrees of freedom b. effect size c. the symbol for the statistic used d. p value associated with the test statistic
The data below show sport preference and age of participant from a random sample of members of a sports club. Is there evidence to suggest that they are related? Frequencies of Sport Preference and Age Tennis Swimming Basketball 18-25 97 86 72 26-30 91 78 54 31-40 68 72 50 Over 40 67 58 43 What can be concluded at the a = 0.10 significance level?
In 2011, a U.S. Census report determined that 52% of college students are working students. A researcher thinks this percentage has changed and surveys 182 college students. The researcher reports that 106 of the 182 are working students. Is there evidence to support the researcher's claim at the 1% significance level? a. Determine the null and alternative hypotheses. Ho:p = H1: p ?V (Select the correct symbol and enter the value.) b. Determine the test statistic. Round to two decimal places. c. Find the p - value. Round to four decimal places. p- value = d. Are the results statistically significant? O Fail to reject the null hypothesis. O Reject the null hypothesis. e. Write the conclusion. O There is not sufficient evidence to support the claim that the percentage of working college students has changed. O There is sufficient evidence to support the claim that the percentage of working college students has changed.
a. Let p denote the population proportion of correct hand selections by touch therapists. Identify the null and alternative hypotheses to test the claim that touch therapists use a method equivalent to random guesses. b. Identify the test statistic. c. Identify the P-value. d. State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. Address whether the results suggest that touch therapists are effective.

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