Determine (a) the x2 test statistic, (b) the degrees of freedom, (c) the critical value using a = 0.05, and (d) test the hypothesis at the a = 0.05 level of significance Outcome A B C D Observed 22 22 18 18 Expected 20 20 20 20
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Determine (a) the x2 test statistic, (b) the degrees of freedom, (c) the critical value using a = 0.05, and (d) test the hypothesis at the a = 0.05 level of significance
|
Outcome
|
A
|
B
|
C
|
D
|
|
|---|---|---|---|---|---|
|
Observed
|
22
|
22
|
18
|
18
|
|
|
Expected
|
20
|
20
|
20
|
20
|
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- Researchers are conducting a pooled, right-tailed, two-mean hypothesis test at a 5% significance level. The two samples have sizes n1=22 and n2=15. The next step for the researchers is to find the critical value(s) for the hypothesis test. Determine the critical value(s) for this test. df...35363738t0.10…1.3061.3061.3051.304t0.05…1.6901.6881.6871.686t0.025…2.0302.0282.0262.024t0.01…2.4382.4342.4312.429t0.005…2.7242.7192.7152.712 Select all correct answers. Select all that apply: −1.69 −1.688 −1.687 1.687 1.688 1.69 QUESTION 3 Researchers are conducting a pooled, left-tailed, two-mean hypothesis test at a 1% significance level. The two samples have sizes n1=19 and n2=14. The next step for the researchers is to find the critical value(s) for the hypothesis test. Determine the critical value(s) for this test.…Test the given claim using the α=0.05 significance level and assuming that the populations are normally distributed. Claim: The treatment population and the placebo population have the same mean. Treatment group: n=7, x⎯⎯⎯=111, s=6.1. Placebo group: n=12, x⎯⎯⎯=104, s=5. (a) The test statistic is . (b) What are the degrees of freedom? df = (c) The negative critical value is . (d) The positive critical value isSummary statistics are given for independent simple random samples from two (2) populations. Use the nonpooled t-test to conduct a two-tailed hypothesis test using a significance level of 0.01 x₁ = 75.3, s₁ = 4.5, n₁ = 11, x2 = 65.5, s2 = 5.1, n2 = 9 Test statistic, t=4.506, critical value=+/-2.921, reject null hypothesis Test statistic, t=2.646, critical values=+/-2.921, do not reject the null hypothesis Test statistic, t=2.646, critical values=+/-2.878, do not reject the null hypothesis Test statistic, t=4.506, critical values=+/-2.878, reject null hypothesis
- What is the average volunteering time for females and males?[OBJ ........What is the value of t?.... What is the critical value of t, assuming a one tailed test, and a .05 level of significance? Is ourt - value significant according to the value of previous question ..Males 20, 25, 35, 40, 36, 24 Females 35, 39, 38, 43, 50, 49 оваIdentify the null hypothesis, alternative hypothesis, test statistic, critical value(s), P-value (range of P-value), conclusion about the null hypothesis, and final conclusion that addresses the original claim. Assume that the two samples are independent simple random samples selected from normally distributed populations. The drug Clarinex is used to treat symptoms from allergies. In a clinical trial of this drug, 2.1% of the 1655 treated subjects experienced fatigue. Among the 1652 subjects given placebos, 1.2% experienced fatigue. Use a 0.05 significance level to test the claim that the incidence of fatigue is greater among those who use Calrinex. A) Test the claim using a hypothesis test.B) Construct an appropriate confidence interval. I don't know which one to use in the TI 84 Calculator. I was going to use 2propztest but it wasn't working because there is no x bar in the equation the equation only has N and P hat (I think)Identify the null hypothesis, alternative hypothesis, test statistic, critical value(s), P-value (range of P-value), conclusion about the null hypothesis, and final conclusion that addresses the original claim.Assume that the two samples are independent simple random samples selected from normally distributed populations. The drug Clarinex is used to treat symptoms from allergies. In a clinical trial of this drug, 2.1% of the 1755 treated subjects experienced fatigue. Among the 1552 subjects given placebos, 1.2% experienced fatigue. Use a 0.02significance level to test the claim that the incidence of fatigue is greater among those who use Calrinex. A)Test the claim using a hypothesis test.B)Construct an appropriate confidence interval.
- A random sample is selected from a normal population with a mean of u = 110 and a %3D standard deviation of o = 11. After treatment is administered to the individuals in the sample, the sample mean is found to be M = 115. Based on Cohen's d, which of the following best describes the effect size? Very small Very large Small to medium None of the aboveTest the claim that the mean GPA of night students is significantly different than the mean GPA of day students at the 0.1 significance level. The null and alternative hypothesis would be: Ho: PNPD Ho: PN = PD Ho: "N="D_H₁: "N=PD Ho: PN = PD Ho: PN = PD o H₁: μNμD H₁: Pn > PD H₁: µN> µD H₁: µN <μD H₁: PNPD H₁: PNCalculate the Pearson Correlation Coefficient for these two variables and b) test whether the correlation is significantly different from 0. Run the test at a 5% level of significance. Give each of the following for 1) the appropriate null and alternative hypotheses; 2) the appropriate test; 3) the decision rule; 4) the calculation of the test statistic; and 5) your conclusion including a comparison to alpha or the critical value. ID Hours of Study (x) Exam Score (y) 1 2 80 2 3 83 3 5 95 4 1 79 5 2 84 6 3 90A random sample of 15 families representing three social classes has been observed for the frequency with which the parents administer physical punishment to the children over a period of a week. Are the differences significant? Use α = .05 and the five-step model to conduct your hypothesis test. Write a sentence or two interpreting your results. Working Class: 10,9,4,2,1 Middle Class: 11,10,5,2,0 Upper Class: 7,5,2,0,0You wish to test the following daim (Ha) at a significance level of a = 0.02. H.:P1 = P2 Ha:P1 + P2 You obtain 244 successes in a sample of size n1 = 266 from the first population. You obtain 455 successes in a sample of size n2 = 474 from the second population. critical value = ± [three decimal accuracy] test statistic = [three decimal accuracy] The test statistic is... O in the critical region O not in the critical region This test statistic leads to a decision to... O reject the null accept the null fail to reject the null As such, the final condusion is that... O There is sufficient evidence to support that the first population proportion is not equal to the second population proportion. O There is not sufficient evidence to support that the first population proportion is not equal to the second population proportion.Test the claim that the mean GPA of night students is significantly different than the mean GPA of day students at the 0.01 significance level. The null and alternative hypothesis would be: Ho:PN = PD Ho:PN = PD Ho:HN = µD_HoHN = µD_Ho:PN = PD Ho:µN = HD H1:PN pp H:µN > µp_H1:UN # HD H1:PN PD H1:HN Next Question MacBook Air 80 DII DD F3 F4 F5 F6 F7 F8 F9 &SEE MORE QUESTIONS