Bargh, Chen, and Burrows (1996) predicted that exposure to words associated with old age and fragility would have a subconscious effect on people and cause them to walk more slowly than the average walking speed. The average person walks 2.79620 km/h. In their experiment, Bargh et al. brought 42 participants to a research lab and asked them to solve word problems. The group of participants solved problems involving words such as old, bingo, and Florida. Unknown to the participants, the researchers measured their walking speeds when they left the research lab. The dependent variable was walking speed, measured in kilometers per hour.

Determine the critical value of thet-statistic required to rejectH₀, assuming= .01

Show the formula for the statistic you will use to testH_0.

Should you retain or rejectH₀?

Calculate the estimated effect size of the difference between the sample mean and the population mean, and calculate the approximate 95% confidence interval around this estimate.

2.8152	4.8406	3.4577
1.3533	2.0453	2.9843
3.4552	2.8902	3.7772
3.7883	3.5023	3.5463
3.2412	2.0098	1.0684
1.2112	1.7258	2.7514
2.3372	3.6978	1.9456
1.2513	1.5112	3.0323
1.3291	2.4582	2.7233
3.9562	1.3992	1.8573
2.9564	3.7228	3.9022
3.7292	2.7852	3.4232
2.6614	3.5652	1.0290
1.4905	2.7502	2.8091