A university is testing a new study technique that they claim helps students improve their reading
comprehension time by more than 4 minutes on average over a 2-month period with regular use. To
test this claim, a study is conducted with 18 students who follow the technique as instructed. At the
end of the study, the observed average improvement in reading comprehension time among
participants is 4.5 minutes with a sample standard deviation of 1.2 minutes.
Test this hypothesis at the 10% significance level using a one-tailed test, and interpret the results.
Choose the appropriate conclusion from the options below:
a. There is sufficient evidence at the 10% level of significance to conclude that the study technique
does not lead to an average reading comprehension improvement of more than 4 minutes.
b. There is sufficient evidence at the 10% level of significance to conclude that the study technique
leads to an average reading comprehension improvement of more than 4 minutes.
c. There is insufficient evidence at the 10% level of significance to conclude that the study technique
leads to an average reading comprehension improvement of more than 4 minutes.
