A research claims that a post lunch nap decreases the amount of time it takes males to Sprint 20 meters after a night with 4 hours of sleep. The table shows the amounts

of time (in seconds) it took for 10 males to Sprint 20 meters after a night with only 4 hours sleep when they did not take a post lunch nap and when they did take a post lunch nap. At a=.10, is there enough evidence to support the research claim? Assume the samples are random and dependent, and the population is normally distributed. Complete c through e.

Male. 1. 2. 3. 4. 5. 6. 7. 8.

Sprint without. 3.96. 4.01. 3.96. 3.91. 3.95. 4.06. 4.09. 3.99

nap

Sprint with nap. 3.94. 4.01. 3.95. 3.93. 3.92. 4.04. 4.09. 3.97

Male. 9. 10

Sprint without. 3.99. 3.98

nap

Sprint with nap. 4.00. 3.96

C. Calculate -d and sd.

Calculate SD

D. Find the standardized test statistic.

E. Decide whether to reject or fail to reject the null hypothesis and interpret the decision in the context of the original claim.