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The average response time to a bank robbery is about 9 min. A local community wants...

The average response time to a bank robbery is about 9 min. A local community wants to improve on this time, so they implement advanced training seminars. They find that the new response time for a sample of 36 police officers is 8 ± 4.2 (M±SD) min. Test whether this advanced training seminar reduced response time at a .05 level of significance.

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Answer #1

Answer:

Given,

= 9

Mean = 8

Standard deviation = 4.2

Sample n = 36

consider,

test statistic t = (M - u)/(s/sqrt(n))

substitute values

= (8 - 9)/(4.2/sqrt(36))

t = -1.43

P value corresponding to z = -1.43 is 0.0808

Here we observe that,

P value > alpha, so the advanced training seminar didn't reduced response time.

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