Question

Parametric Hypothesis Testing Comparing Two or More Means 2 Interpreting output for a one-sample t test A Aa 3 You are a marketing expert for a company that is producing a new kind of energy bar. You want to provide evidence that consuming that particular bar 1 hour before engaging in strenuous exercise of a long duration such as running a marathon-will improve performance. You decide to conduct a test at a half-marathon race. You know that the participants' average time in the race the previous year was 2 hours and 7 minutes (2:07, or 127 minutes). Since the course and conditions are similar this year, you decide to provide the bar to 125 randomly selected participants and compare their times with last year's average. The average time of your sample is 1 hour and 58 minutes (1:58, or 118 minutes) with a sample standard deviation of 29 minutes. You use a statistical computing package, such as SPSS, to conduct a single-sample t test. The table that follows consists of the output: One-Sample Test Test Value = 127 Sig Mean t df (Two-tailed) Difference -3.47 124 .001 -9.00 95% Confidence Interval of the Difference Lower Upper 14.13 3.87 Time Given these results, which of the following is the most accurate statement you can include in the marketing materials for the energy bar company? (Assume the industry's standard significance level is a = .05.) There was no convincing evidence that consuming the energy bar 1 hour before the race began had an effect on performance, t(125) -9.00, P-.05. O Consuming the energy bar 1 hour before the race began had a significant effect on performance, t(124) = 3.47, P = 001. Participants who consumed the energy bar ran an average of nine minutes faster than last year's average O Consuming the energy bar 1 hour before the race began had a significant effect on performance, t(125) - 9.00, P-001. Participants who consumed the energy bar ran an average of nine minutes faster than last year's average There was no convincing evidence that consuming the energy bar 1 hour before the race began had an effect or performance, t124) -3.47.05.

Answer 1

DATE or output From the above data This sided to test are given that in ouput test statistic ValuRs.3.47 p-value - oool we The energy so the we reject the hell hypothers second option in correct the consuming the bar 1 hour before the race har significant effect an performance, telys= - 3.476 Prooool participiant who contened bar awarage OF nin! minuter faster than that Year's owaraye t the energy REDMI NOTE 8 PRO 64MP QUAD CAMERA