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A city council is deciding whether or not to spend additional money to reduce the amount...

A city council is deciding whether or not to spend additional money to reduce the amount of traffic. The council decides that it will increase the transportation budget if the amount of waiting time for drivers exceeds 18 minutes. A sample of 41 main roads results in a mean waiting time of 19.74 minutes with a standard deviation of 6.03 minutes. Use Table 2.

a. Select the relevant null and the alternative hypotheses.

H0: ? ? 18; HA: ? > 18

H0: ? = 18; HA: ? ? 18

H0: ? ? 18; HA: ? > 18

b. Compute the value of the appropriate test statistic. (Round intermediate calculations to 4 decimal places. Round your answer to 2 decimal places.)

Test statistic

c-1. Calculate the critical value at a 10% level of significance. (Round your answer to 3 decimal places.)

Critical value

c-2. Determine whether or not the city should increase its transportation budget.

Do not reject H0; the city should not increase its transportation budget

Reject H0; the city should not increase its transportation budget

Do not reject H0; the city should increase its transportation budget

Reject H0; the city should increase its transportation budget

math   Statistics-And-Probability   
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