Use Excel to find the p-value for each test statistic.a. Right-tailed test, t = +1.677, n = 13 b. Left-tailed test, t = −2.107, n = 5 c. Two-tailed test,t = −1.865, n = 34
To find the p-value for each test statistic using Excel, we can use the T.DIST.RT function for the right-tailed test, T.DIST for the left-tailed test, and T.DIST.2T for the two-tailed test. Here's how you can do it:
a. Right-tailed test, t = +1.677, n = 13:
1. Open Excel and enter the value of the test statistic (+1.677) in a cell, say cell A1.
2. In another cell, enter the degree of freedom which is (n - 1), so n = 13 implies (13 - 1) = 12. Let's say you put this value in cell A2.
3. In another cell, say A3, enter the formula "=T.DIST.RT(A1, A2)".
4. Press enter, and Excel will give you the p-value for the right-tailed test.
b. Left-tailed test, t = -2.107, n = 5:
1. Open Excel and enter the value of the test statistic (-2.107) in a cell, let's say A1.
2. In another cell, enter the degree of freedom which is (n - 1), so n = 5 implies (5 - 1) = 4. Enter this value in cell A2.
3. In another cell, say A3, enter the formula "=T.DIST(A1, A2, TRUE)".
4. Press enter, and Excel will give you the p-value for the left-tailed test.
c. Two-tailed test, t = -1.865, n = 34:
1. Open Excel and enter the value of the test statistic (-1.865) in a cell, let's say A1.
2. In another cell, enter the degree of freedom which is (n - 1), so n = 34 implies (34 - 1) = 33. Enter this value in cell A2.
3. In another cell, say A3, enter the formula "=T.DIST.2T(A1, A2)".
4. Press enter, and Excel will give you the p-value for the two-tailed test.
By following these steps, you can easily find the p-value for each test statistic using Excel.