A researcher is comparing the reaction time of 12-year-olds who play video games and 12-year-olds who do not. A random sample from each group provided the results shown below.

Reaction times of 12-year-olds

Player of video games. Non-players of video games

Sample size 30 30

Mean reaction time(seconds) 0.59 0.61

Standard deviation of reaction

time(seconds) 0.04 0.05

Using a 1% significance level, can the researcher conclude that the mean reaction time of players of video games is less than the mean reaction time of non-players of video games.

H_o:_pnPlease note that the parameters are already given in the hypothesis statements.

H_A:_pnType >, <, or "not equals to"

T-stat =Round your answer to 2 decimal place.

p-value =

Decision:TypeRetain H_oorReject H_o

_{2)Please provide a} summarystatementforthe hypothesis test above.

3)A history professor is curious if students who studied from printed hard copy had different mean test scores than students who studied text presented on a screen (e-book). In his large lecture classes, he randomly selected students and surveyed them about how they studied.At the end of the semester his survey and final exam scores revealed that 36 students studied from printed hard copy had a mean final exam score of 70 with a standard deviation of 8.The 45 students that studied from an e-book had a mean final exam score of 76 with a standard deviation of 10.Use this information to determine if there is a significant difference in the mean test scores in these two groups. (Let= 0.10)

Hypothesis Statements

H_o:_hePlease note that the parameters are already given in the hypothesis statements.

H_A:_heType >, <, or "not equals to"

T-stat =Round your answer to 2 decimal place.

p-value =Do not round,

Decision:TypeRetain H_oorReject H_o

4)Write asummarystatementforthe hypothesis test above.

5)Which of the following is NOT an assumption or condition for a hypothesis test for two means?

a)Randomization Assumption

b)Success/Failure Condition

c)independence Assumption

d)Is n big enough?