be  .52 ​(​52%). A second poll based on 2500  randomly selected voters showed that 1315 approved of the job the president was doing. Do the results of the second poll indicate that the proportion of voters who approve of the job the president is doing is significantly higher than the original​ level? Explain. Assume the x=0.01 level of significance. Find the test statistic for this hypothesis test. z=?

The p-value for a hypothesis test turns out to be 0.04836. At a 5% level of significance, what is the proper decision? O Reject Hg O Fail to reject H9

The p-value for a hypothesis test turns out to be 0.05015. At a 2% level of significance, what is the proper decision? Reject H0H0 Fail to reject H0

Use the six steps of hypothesis testing to answer the following question. Remember to determine if the problem is a Z test or T test as that will influence your critical value.  You work at a cereal plant and believe the machines are under filling the boxes. All boxes should contain 20 ounces of cereal. You draw a sample of 70 boxes and find an average of 18.6 ounces with a standard deviation of 2.8. Are the boxes being under filled?

true or false  If the p-value is 0.13 and the level of significance , αα , is 0.05 in a hypothesis test for a mean, then we accept the null hypothesis.

Find the value of the standard score, z, and determine whether to reject the null hypothesis at a 0.10 significance level. Is the alternative hypothesis supported? Ho: p= 19.6 seconds, H: p> 19.6 seconds, n = 121, x=20 5 seconds, o = 2.0 seconds a The value of the standard score is (Round to two.decimal places as needed.)

Which of the following is the correct way to report the results of a hypothesis test and a measure of effect size using a tstatistic?​     a. ​r2 = 0.42, t(19) = 2.30 , p < .05   b. ​t(19) = 2.30, p < .05, r2 = 0.42   c. ​t = 2.30, df = 19, p < .05, r2 = 0.42   d. ​t(19) = 2.30, r2 = 0.42, p < .05

A news article that you read stated that 54% of voters prefer the Democratic candidate. You think that the actual percent is smaller. 102 of the 221 voters that you surveyed said that they prefer the Democratic candidate. What can be concluded at the 0.10 level of significance?For this study, we should use The null and alternative hypotheses would be: Ho: (please enter a decimal) H1: (Please enter a decimal)The test statistic = (please show your answer to 3 decimal places.)The p-value = (Please show your answer to 4 decimal places.)The p-value is ααBased on this, we should the null hypothesis.Thus, the final conclusion is that ... The data suggest the population proportion is not significantly smaller 54% at αα= 0.10, so there is not sufficient evidence to conclude that the proportion of voters who prefer the Democratic candidate is smaller 54%.The data suggest the populaton proportion is significantly smaller 54% at αα= 0.10, so there is sufficient evidence to conclude that the…

A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 258 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related? Vaccination Status Diseased Not Diseased Total Vaccinated 55 62 117 Not Vaccinated 70 71 141 Total 125 133 258 Copy Data Step 1 of 8: State the null and alternative hypothesis.

K Use the IQ scores for the accompanying sample of individuals with low lead exposure to test the claim that they are from a population with a median IQ score of 100. Use a 0.01 significance level. Click the icon to view the data on IQ scores. F2 Find the null and alternative hypotheses. OA. Ho: Median = 100 H₁: Median #100 OC. Ho: Median = 100 H₁: Median 100 Find the test statistic. z=(Round to two decimal places as needed.) Find the P-value. F3 F4 F5 F6 W F7 DELL F8 Ō GET OB. Ho: Median # 100 H₁: Median = 100 OD. Ho: Median 100 H₁: Median = 100 F9 O F10 F11 :: F12 PrtScr 60 Submit quiz Insert Submit quiz 11:45 AM 4/9/2023 Delete