A researcher hypothesizes that people who listen to classical music have higher levels of concentration than those in the general population. On a standard concentration test, the overall mean is 15. The researcher gave this same test to a random sample of 10 individuals who regularly listen to classical music. Their scores on the test were as follows: 15, 14, 20, 12, 25, 21, 22, 18, 16, 17.
Decide whether to use a z-test or a t-test, then find the z obt or t obt.
a. -1.61
b. +2.36
c. +1.61
d. + 1.86
I'm having trouble knowing what formula to use. I'm almost 100 percent sure the t test is what's needed for this question, but I'm not sure which t test is needed. Even if I did know, I'm having trouble understanding how to figure the problem. If anyone can be of assistance, I'd greatly appreciate it.
Decide whether to use a z-test or a t-test, then find the z obt or t obt.
a. -1.61
b. +2.36
c. +1.61
d. + 1.86
I'm having trouble knowing what formula to use. I'm almost 100 percent sure the t test is what's needed for this question, but I'm not sure which t test is needed. Even if I did know, I'm having trouble understanding how to figure the problem. If anyone can be of assistance, I'd greatly appreciate it.