Dr. Nichols wants to know whether police stops of citizens are longer in the day time...

Dr. Nichols wants to know whether police stops of citizens are longer in the day time or at night. He ran a dependent-samples t test analysis. The results of the analysis are shown here:

Paired Samples Statistics

Pair 1: Duration (minutes) of stops made during the day mean= 13.58 N=65 Std. Deviation= 17.843 Std. Error Mean= 2.213

Duration (minutes) of stops made at night mean=9.60 N=65 Std. Deviation = 8.891 Std. Error Mean = 1.103

Paired Sampled Correlations

Pair 1: Duration (minutes) of stops made during the day & Duration (minutes) of stops made a night N = 65 Correlation=0.129 Sig=/ 0.306

Paired Sampled Test: Paired Differences

95% Confidence Interval of the Difference

Mean = 3.965 Std. Deviation = 18.882 Std. Error Mean = 2.342 Lower = -0.694 Upper = 8.663 t = 1.701 df = 64 Sig (2-tailed) = 0.094

Using the data shown above, complete the 5 steps of a hypothesis test. At the end, write a couple of sentences describing your substantive conclusions.

Expert Solution

orchestra answered 2 years ago

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