Astudy claims that college students spend an average of 4 hours or less studying per day. a researcher wants to check if this claim is true. a random sample of 121 college students randomly selected and it showed that average of hours studying per day was 3.15 with a standard deviation of 1.2 hours. using the 10% significance level, can you conclude that the claim college students spend an average of 4 hours or less studying per day is valid?
1. h0 hypothesis: a. μ > 4 b. μ ≥ 4 c.μ ≤ 4 d. μ < 4
2. critical value: a. -1.28 b. 1.28 c. 1.645 d. -1.645
3. test statistics: a. -5.89 b. 5.89 c. -7.79 d. 7.79
4. comment: a: accept that college students spend an average of 4 hours or less studying per day
b: reject that college students spend an average of 4 hours or less studying per day