In a study, the rate of success of initial vaccination among 330 subjects receiving the 1:10 dilution of the vaccinia virus was 97.1%. The investigators wanted to know if the 97.1% success rate was greater than 95%. Use a = 0.05.

The predicted college GPA for a high school GPA of 3.8 and a college board score of 500 is (Round to the nearest tenth as needed.)

The president of a local college reported that more than 25% of the students received a scholarships. To see if this is true, the registrar selected sample of 100 students and found that 22 received scholarships. At a=0.05, test the claim that more than 25% of the students have scholarships.

A college administrator wants to know if there is a significant difference between sexual orientation and level of family support for students at their college. The administrator takes a random sample of students who identify as gay/lesbian, bisexual or heterosexual/straight. There were 22 students sampled in each category. A measure of family support is given with higher scores indicating more family support. The means are as follows: Gay/lesbian Bisexual Heterosexual/Straight MG/L = 16 MBi = 17 MH/S = 22   Source SS df MS F Orientation 300       Error 2961       Total           What is the value of MS error?

A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness, researchers placed an ad online asking for volunteers to participate in the study. One hundred subjects replied and were informed that one group would receive the new cream and the other group would Which of the following accurately describes the benefit of comparison in the experiment? O The overall level of irritation can be compared to see if the new cream had a significant effect. O The level of irritation for both groups can be receive a cream with no active ingredient. All 100 subjects were exposed to poison ivy. Fifty were then randomly assigned to the group with the new cream, and 50 were randomly assigned to the group with the cream with no active ingredient. After three days, the subjects' level of irritation was measured. compared to see if the new cream had a significant effect. O The level of irritation in the treatment group only can be compared to see if the new cream had…

The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 26 records of automobile driver fatalities in Kit Carson County, Colorado, showed that 14 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.01. Solve the problem using both the traditional method and the P-value method. Since the sampling distribution of p̂ is the normal distribution, you can use critical values from the standard normal distribution as shown in the table of critical values of the z distribution. (Round the test statistic and the critical value to two decimal places. Round the P-value to four decimal places.)   test statistic =   critical value =   P-value =

A recent study claims that 40% of registered voters associate themselves with Democrats. 35% with Republicans, 20% Independent, 3% Green party, and 2% with Social democrats. In a sample of 400 individuals, we observed Actual 200 Democrats 150 Republicans 25 Independent 15 Green Party 10 Social Democrats Test the claim at a=0.05.

The claim is that the proportion of peas with yellow pods is equal to 0.25 or 25% the sample statistic from one experiment includes 570 Peas with 110 of them having yellow pods find the value of the test statistic.

untreated depression will lose at least one friendship while not receiving treatment. On the other hand, when people with depression are treated with medication and counseling, only 2 out of 100 will lose at least one friendship during treatment. The absolute risk of losing at least one friendship while dealing with untreated depression is Answer: 25 / 100 = 0.25 = 25%

A histological test for cancer has sensitivity, specificity, positive predictivity, and negative predictivity in excess of 90 percent. Which of the four indicators would you use to reassure a patient that the positive result could be in error? Explain your answer.