c. After conducting the appropriate significance test, the test statistic was found to be -3.6893. Therefore, the conclusion for the test is:
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- The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.A concerned group of citizens wanted to determine whether the proportion of armed robberies in the state of Texas was different in 2011 than in 2010. Research shows that of the 113,231 violent crimes in Texas in 2010, 7,622 of them were armed robberies. In 2011, 7,439 of the 104,873 violent crimes were in the armed robery category. Test at the 0.05 significance level. Preliminary: a. Is it safe to assume that n2010 < 5% of all violent crimes during 2010 and n2011 5% of all violent crimes during 2011? O Yes ONo b. Verify np(1-P)2 10. Round your answer to one decimal place. n12010p (1 – p) = N2011P(1 – p) = Test the claim: a. Determine the null and alternative hypotheses. Ho: P2010 ? VP2011 H.: P2010 ? V P2011 b. Determine the test statistic. Round to two decimal places. c. Find the p-value. Round to four decimals. P-value = d. Make a decision. O Reject the null hypothesis. O Fail to reject the null hypothesis. e. Write the conclusion. OThere is not sufficient evidence to support the…A previous study claims that 40% of people own a cat. A researcher believes that proportion has decreased. The researcher takes a random sample of 140 people and finds that 49 of them own a cat. Using a significance level of 0.05, test the claim using a one-proportion hypothesis test.The null and alternative hypothesis would be:The test statisitc is: The p-value is:State the conclusion:
- Vita Pills were advertised as having 751 mg of vitamin C per pill. A marketing firm hypothesizes that the amount of vitamin C is more than what is advertised. What can be concluded with α = 0.10. The vitamin C content per pill from a sample of pills is as follows:701, 761, 716, 721, 751, 721, 711, 741. A) What is the appropriate test statistic? B) Population and sample? C) Obtain/compute the appropriate values to make a decision about H0. Critical value= Tests statistic= D)Compute the corresponding effect size(s) and indicate magnitude(s). d= r2= E)Make an interpretation based on the results. The amount of vitamin C in Vita Pills is significantly more than the advertised claim. The amount of vitamin C in Vita Pills is significantly less than the advertised claim. The amount of vitamin C in Vita Pills is not significantly different than the advertised claim ---Select--- marketing firm advertisement Vita Pills sample of pills vitamin C ---Select--- marketing…The coach of a very popular men’s basketball team claims that the average distance the fans travel to the campus to watch a game is 35 miles. The team members feel otherwise. A sample of 16 fans who travel to games was randomly selected and yielded a mean of M= 36 miles and s= 5 miles. Test the coach’s claim at the 5% (.05) level of significance. one-tailed or two-tailed test: State the hypotheses: df= tα or t value for the critical region = sM = t (test statistic)= Decision:The accompanying table shows results of challenged referee calls in a major tennis tournament. Use a 0.05 significance level to test the claim that the gender of the tennis player is independent of whether a call is overturned. Was the Challenge to the Call Successful? Yes No Men 246 790 Women 351 550
- Give one research example of when: A) A one-sample t-statistic should be used? B) An independent-measures t-statistic should be used? C) A repeated-measure t-test should be used?A local McDonald's manager will return a shipment of hamburger buns if more than 10% of the buns are crushed. A random sample of 81 buns finds 13 crushed buns. A 5% significance test is conducted to determine if the shipment should be accepted. The p value for this situation is:Results from a civil servant exam are shown in the table to the right. Is there sufficient evidence to support the claim that the results from the test arediscriminatory? Use a 0.01 significance level. Passed Failed White candidates 17 14 Minority candidates 9 29 If: H0: White and minority candidates have the same chance of passing the test. H1: White and minority candidates do not have the same chance of passing the test. answer the following: **1. Determine the test statistic. x2 = ____ **2. Determine the P-value of the test statistic. p= ____
- A newspaper conducted a statewide survey concerning the 1998 race for state senator. The newspaper took a SRS of n=1300 registered voters and found that 670 would vote for the Republican candidate. Let p represent the proportion of registered voters in the state who would vote for the Republican candidate.We test Ho: p=.5 Ha: p>.5 What is the -statistic for this test? What is the P-value of the test?Provide some details for the following examples using a significance value of .05 (using the sign, number, and significance): r = 0.3 (p > .05) r = .99 (p < .05) r = -.8 (p < .05)b. In 2018, a sample of 300 in-store shoppers showed that 44 paid by debit card. The results shown in the table below were obtained when a sample of 400 in-store shoppers were surveyed in 2019. Year 2018 2019 Shoppers Surveyed Shoppers Paying by Debit Card 44 Formulate appropriate hypotheses to test whether the percentage of debit card shoppers increased, and conduct the test using a significance level of 0.01. What is your conclusion? 300 400