ISYE Ch 11 Question and answers
100% correct 2026
The observed value t(24)=2.35 is significant at the .05 level (two-tailed test). - correct answer ✔True
The t-test for independent samples should be used when participants are tested multiple times. -
correct answer ✔False. When tested only once.
The sign of the observed t value (positive or negative) is always a crucial element in conducting the t-test
fr independent studies. - correct answer ✔False. Only when directional.
Which of the following is significant at the .05 level (two-tailed test)? - correct answer ✔t(212)= 1.99
Which of the following is significant at the .01 level (one-tailed test)? - correct answer ✔t(70)=2.45
The t-test for independent samples should be used in which of the following scenarios? - correct answer
✔You are comparing exactly two groups that are unrelated
The assumption that the t-test for independent samples makes regarding the amount of variability in
each of the two groups is called the ________. - correct answer ✔Homogeneity of variance assumption
The value used in the equation for the t-test for independent means that approximates the sample size
is known as the ________. - correct answer ✔Degrees of freedom
Imagine that you look up a critical t value in a t table and your observed t value for a specific degrees of
freedom lies between two critical values in the table. To be conservative, you would select the
________. - correct answer ✔Smaller value
100% correct 2026
The observed value t(24)=2.35 is significant at the .05 level (two-tailed test). - correct answer ✔True
The t-test for independent samples should be used when participants are tested multiple times. -
correct answer ✔False. When tested only once.
The sign of the observed t value (positive or negative) is always a crucial element in conducting the t-test
fr independent studies. - correct answer ✔False. Only when directional.
Which of the following is significant at the .05 level (two-tailed test)? - correct answer ✔t(212)= 1.99
Which of the following is significant at the .01 level (one-tailed test)? - correct answer ✔t(70)=2.45
The t-test for independent samples should be used in which of the following scenarios? - correct answer
✔You are comparing exactly two groups that are unrelated
The assumption that the t-test for independent samples makes regarding the amount of variability in
each of the two groups is called the ________. - correct answer ✔Homogeneity of variance assumption
The value used in the equation for the t-test for independent means that approximates the sample size
is known as the ________. - correct answer ✔Degrees of freedom
Imagine that you look up a critical t value in a t table and your observed t value for a specific degrees of
freedom lies between two critical values in the table. To be conservative, you would select the
________. - correct answer ✔Smaller value
