The degrees of freedom for the appropriate critical value with a hypothesis test comparing two population...
The degrees of freedom for the appropriate critical value with a hypothesis test comparing two population means with population variances that are unknown but assumed to be equal are determined by .
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Homework Answers
We want to find the degrees of freedom for the appropriate critical value with a hypothesis test comparing two population means with population variances that are unknown but assumed to be equal are determined by ......
Here we use the two-sample independent t-test
consider n1 sample size for first sample
& n2 is the sample size of the second sample.
then the degree of freedom for the test is n1 + n2 - 2.
Answer:- n1 + n2 -2
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The degrees of freedom for the appropriate critical value with a
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When the standard deviations are equal but unknown, a test for the differences between two population...
When the standard deviations are equal but unknown, a test for the differences between two population means has n − 1 degrees of freedom. True or False?
When the standard deviations are equal but unknown, a test for the differences between two population...
When the standard deviations are equal but unknown, a test for the differences between two population means has n − 1 degrees of freedom. True or False
8. Degrees of freedom for chi-squared tests are determined by sample size. True or False 7....
8. Degrees of freedom for chi-squared tests are determined by sample size. True or False 7. If a correlation between two variables is negative, that means there is no linear relationship between them. True or False 2. For a chi-square test, if the observed number of cases in your sample fits what you expect given your knowledge of the population, you would reject the null hypothesis. True or False 1. A two-tailed hypothesis will have more statistical power than a...
Determine (a) the χ2 test statistic, (b) test degrees of freedom, (c) the critical value using...
Determine (a) the χ2 test statistic, (b) test degrees of freedom, (c) the critical value using α=0.05, and (d) test the hypothesis at the α=0.05 level of significance. Outcome Observed Expected A 18 20 B 18 20 C 22 20 D 22 20 H0:Pa=Pb=Pc=Pd=1/4 H1: at least one of the proportions is different from the others. (a)test statistics is 0.8 (b) There are 3 degrees of freedom (c) The critical value is X ?? (round three decimal places as needed)...
need help as soon as possible 14. Find the critical value, , for a hypothesis test...
need help as soon as possible
14. Find the critical value, , for a hypothesis test for a population mean with (A) 2.33 (B) - 2.33 (C) 2.575 (D) - 2.575 15. If the p-value is less than a, then reject the null hypothesis. (A) True (B) False 16. Calculate the test statistic, for a hypothesis test for two population means using the given information: (A) 1.30
Outcome Observed Expected404040 40 Determine test statistic, b) the degrees of freedom c) the critical value...
Outcome Observed Expected404040 40 Determine test statistic, b) the degrees of freedom c) the critical value using α-0.05, and d) test the hypothesis at the α-0 05 level of significance. a) the χ 42 39 38 41 H,: At least one of the proportions is different from the others. (a) The test statistic is Type an exact answer.) (b) There aredegrees of freedom (c) The critical value is Round to three decimal places as needed.) (d) Should the null hypothesis...
In comparing two population means, an unpaired test provides more precise results than a paired test...
In comparing two population means, an unpaired test provides more precise results than a paired test because the unpaired test uses two independent samples while the paired test uses a single sample. True O False Question 2 1 pts When comparing two population means, if the variations which are unique to each population are very small compared to the variations which are common to both populations, it is reasonable to assume that the population standard deviations are not equal. O...
Find the critical value for a right-tailed test with a = 0.025, degrees of freedom in...
Find the critical value for a right-tailed test with a = 0.025, degrees of freedom in the numerator= 12, and degrees of freedom in the denominator = 25. What is the critical value? (Round to the nearest hundredth as needed.)
What is the critical value for a chi-square test with 28 degrees of freedom at the...
What is the critical value for a chi-square test with 28 degrees of freedom at the 5 percent level of significance (3 pts)? If the chi-square test statistic were 41.10, what would you conclude regarding the null hypothesis (4 pts)? What would you conclude if the chi-square value were 48.19
Please answer them with proper calculations: 1. The degrees of freedom for the test are: 18...
Please answer them with proper calculations: 1. The degrees of freedom for the test are: 18 15 20 21 2. The critical value of t for the test is: 2.101 2.156 2.0123 1.5633 3. The calculated t statistic is 2.44 3.01 2.12 5.123 4. Based on the statistical test you can >reject the null hypothesis. >fail to reject the null hypothesis. >can not determine. >redo the test. 5. The null hypothesis would be: >there is no difference between the two...
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14. Find the critical value, , for a hypothesis test for a population mean with (A) 2.33 (B) - 2.33 (C) 2.575 (D) - 2.575 15. If the p-value is less than a, then reject the null hypothesis. (A) True (B) False 16. Calculate the test statistic, for a hypothesis test for two population means using the given information: (A) 1.30
Outcome Observed Expected404040 40 Determine test statistic, b) the degrees of freedom c) the critical value using α-0.05, and d) test the hypothesis at the α-0 05 level of significance. a) the χ 42 39 38 41 H,: At least one of the proportions is different from the others. (a) The test statistic is Type an exact answer.) (b) There aredegrees of freedom (c) The critical value is Round to three decimal places as needed.) (d) Should the null hypothesis...
In comparing two population means, an unpaired test provides more precise results than a paired test because the unpaired test uses two independent samples while the paired test uses a single sample. True O False Question 2 1 pts When comparing two population means, if the variations which are unique to each population are very small compared to the variations which are common to both populations, it is reasonable to assume that the population standard deviations are not equal. O...
Find the critical value for a right-tailed test with a = 0.025, degrees of freedom in the numerator= 12, and degrees of freedom in the denominator = 25. What is the critical value? (Round to the nearest hundredth as needed.)
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