Calculate observed value of the appropriate test statistic

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Reference no: EM131029194

A survey published in the American Journal of Sports Medicine2 reported the number of meters (m) per week swum by two groups of swimmers-those who competed exclusively in breaststroke and those who competed in the individual medley (which includes breaststroke). The number of meters per week practicing the breaststroke was recorded for each swimmer, and the summary statistics are given below. Is there sufficient evidence to indicate that the average number of meters per week spent practicing breaststroke is greater for exclusive breaststrokers than it is for those swimming individual medley?

                                                                 Specially

 

Exclusively Breaststroke

Individual Medley

Sample site

130

80

Sampk mean (m)

9017

5853

Sample standard deviation (m)

7162

1961

Population mean

μ1

μ2

a State the null and alternative hypotheses.

b What is the appropriate rejection region for an α = .01 level test?

c Calculate the observed value of the appropriate test statistic.

d What is your conclusion?

e What is a practical reason for the conclusion you reached in part (d)?

Reference no: EM131029194

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