Homework Answers
Solution :
Given that ,
Here we performing pooled t test
Degrees of freedom = n1 + n2 - 2 = 5 + 8 - 2 = 11
2. Assume that you have a sample of n = 8 with the sample mean X1...
2. Assume that you have a sample of n = 8 with the sample mean X1 = 42 and a sample standard deviation Si = 4, and you have an independent sample of n2 = 15 from another population with a sample mean of X2 = 34 and a sample standard deviation S2 = 5. a. What is the value of the pooled-variance tsTAT test statistic for testing Ho H1 = H2? b. In finding the critical value, how many...
Assume that you have a sample of n 1 equals 8n1=8, with the sample mean Upper...
Assume that you have a sample of n 1 equals 8n1=8, with the sample mean Upper X overbar 1 equals 49X1=49, and a sample standard deviation of Upper S1=4, and you have an independent sample of 2=12 from another population with a sample mean of Upper X overbar 2=39 and the sample standard deviation Upper S2=8. Complete parts (a) through (d) below. a. What is the value of the pooled-variance tSTAT test statistic for testing Upper H 0 : mu...
Assume that you have a sample of n1=8, with the sample mean Upper X overbar X1=46,...
Assume that you have a sample of n1=8, with the sample mean Upper X overbar X1=46, and a sample standard deviation of Upper S1=6, and you have an independent sample of n2=14 from another population with a sample mean of Upper X2=34 and the sample standard deviation Upper S2=5. In finding the critical value t Subscript alpha divided by tα/2, how many degrees of freedom are there?
Assume that you have a sample of n 1-7, with the sample mean X1-43, and a...
Assume that you have a sample of n 1-7, with the sample mean X1-43, and a sample standard deviation of S1-4, and you have an independent sample of n2-13 from another population with a sample mean of x2 39 and the sample standard deviation S2-7. Complete parts (a) through (d). Click here for page 1 of critical values oft. Click here for page 2 of critical values of t. a. What is the value of the pooled-variance ISTAT test statistic...
10.1.4-T Question Help Assume that you have a sample of n, = 9, with the sample...
10.1.4-T Question Help Assume that you have a sample of n, = 9, with the sample mean X, = 42, and a sample standard deviation of S, = 7, and you have an independent sample of n = 13 from another population with a sample mean of X, = 37, and the sample standard deviation Sy = 8. Construct a 99% confidence interval estimate of the population mean difference between 11 and 12. Assume that the two population variances are...
Assume that you have a sample of ny = 9, with the sample mean X7 =...
Assume that you have a sample of ny = 9, with the sample mean X7 = 41, and a sample standard deviation of S, = 7, and you have an independent sample of n2 = 13 from another population with a sample mean of X2 = 32, and the sample standard deviation S2 = 8. Construct a 90% confidence interval estimate of the population mean difference between Ny and My. Assume that the two population variances are equal. -H2O (Round...
Assume that you have a sample of n = 6, with the sample mean X, =...
Assume that you have a sample of n = 6, with the sample mean X, = 46, and a sample standard deviation of S7 = 4, and you have an independent sample of n2 = 7 from another population with a sample mean of X2 = 35 and the sample standard deviation S2 = 5. Assuming the population variances are equal, at the 0.01 level of significance, is there evidence that Hy >H2? Determine the hypotheses. Choose the correct answer...
Assume that you have a sample of n 1 equals 9, with the sample mean Upper...
Assume that you have a sample of n 1 equals 9, with the sample mean Upper X overbar 1 equals 43, and a sample standard deviation of Upper S 1 equals 6, and you have an independent sample of n 2 equals 12 from another population with a sample mean of Upper X overbar 2 equals 35, and the sample standard deviation Upper S 2 equals 7. Construct a 95% confidence interval estimate of the population mean difference between mu...
Assume that you have a sample size of n1 = 16 with a mean of 42 and a standard deviation (S) equal to 9. Assume that you have another independent sample with n2 = 25, a mean of 36 and a standard devia...
Assume that you have a sample size of n1 = 16 with a mean of 42 and a standard deviation (S) equal to 9. Assume that you have another independent sample with n2 = 25, a mean of 36 and a standard deviation (S) of 4. Assume you are directed to use a significance level of α = 0.01. [DM.4] Construct the appropriate hypothesis test. Identify H0 and H1. What are the appropriate critical values? (4 Decimal Places) From what...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.32 yea...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.32 years and the standard deviation is 8.72 25 37 27 32 46 32 17 27 30 36 42 33 30 41 13 27 44 26 35 32 28 30 49 25 44 years a) How many degrees of freedom does the t-statistic have? b) How many degrees of freedom would the t-statistic have if the sample size had been 400? a) The t-statistic...
2. Assume that you have a sample of n = 8 with the sample mean X1 = 42 and a sample standard deviation Si = 4, and you have an independent sample of n2 = 15 from another population with a sample mean of X2 = 34 and a sample standard deviation S2 = 5. a. What is the value of the pooled-variance tsTAT test statistic for testing Ho H1 = H2? b. In finding the critical value, how many...
Assume that you have a sample of n 1-7, with the sample mean X1-43, and a sample standard deviation of S1-4, and you have an independent sample of n2-13 from another population with a sample mean of x2 39 and the sample standard deviation S2-7. Complete parts (a) through (d). Click here for page 1 of critical values oft. Click here for page 2 of critical values of t. a. What is the value of the pooled-variance ISTAT test statistic...
10.1.4-T Question Help Assume that you have a sample of n, = 9, with the sample mean X, = 42, and a sample standard deviation of S, = 7, and you have an independent sample of n = 13 from another population with a sample mean of X, = 37, and the sample standard deviation Sy = 8. Construct a 99% confidence interval estimate of the population mean difference between 11 and 12. Assume that the two population variances are...
Assume that you have a sample of ny = 9, with the sample mean X7 = 41, and a sample standard deviation of S, = 7, and you have an independent sample of n2 = 13 from another population with a sample mean of X2 = 32, and the sample standard deviation S2 = 8. Construct a 90% confidence interval estimate of the population mean difference between Ny and My. Assume that the two population variances are equal. -H2O (Round...
Assume that you have a sample of n = 6, with the sample mean X, = 46, and a sample standard deviation of S7 = 4, and you have an independent sample of n2 = 7 from another population with a sample mean of X2 = 35 and the sample standard deviation S2 = 5. Assuming the population variances are equal, at the 0.01 level of significance, is there evidence that Hy >H2? Determine the hypotheses. Choose the correct answer...
A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.32 years and the standard deviation is 8.72 25 37 27 32 46 32 17 27 30 36 42 33 30 41 13 27 44 26 35 32 28 30 49 25 44 years a) How many degrees of freedom does the t-statistic have? b) How many degrees of freedom would the t-statistic have if the sample size had been 400? a) The t-statistic...
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