The Scottsdale fire department aims to respond to fire calls in 7 minutes or less, on average. Response times are normally distributed with a standard deviation of 1 minute 42 seconds. Would a sample of 18 fire calls with a mean response time of 7 minutes 22 seconds provide sufficient evidence to show that the goal is not being met at a = .01? (a) Choose the appropriate hypotheses. a. Ho: μs 7 min vs H₂: u> 7 min, Reject Ho if Zeala > 2.326 b. Ho: uz 7 min vs H₁: <7 min, Reject Ho if Zeale > 2.326 (b) Calculate the value of the test statistic. (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. zcalc 1.03

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The Scottsdale fire department aims to respond to fire calls in 7 minutes or less, on average. Response times are normally distributed
with a standard deviation of 1 minute 42 seconds. Would a sample of 18 fire calls with a mean response time of 7 minutes 22 seconds
provide sufficient evidence to show that the goal is not being met at a = 01?
(a) Choose the appropriate hypotheses.
a. Ho: u≤ 7 min vs H₁: 7 min, Reject Ho if Zeale > 2.326
b. Ho: μz 7 min vs H₁: μ<7 min, Reject Ho if Zeale > 2.326
(b) Calculate the value of the test statistic. (Round your answer to 2 decimal places.)
Answer is complete but not entirely correct.
zcalc
1.03
Transcribed Image Text:The Scottsdale fire department aims to respond to fire calls in 7 minutes or less, on average. Response times are normally distributed with a standard deviation of 1 minute 42 seconds. Would a sample of 18 fire calls with a mean response time of 7 minutes 22 seconds provide sufficient evidence to show that the goal is not being met at a = 01? (a) Choose the appropriate hypotheses. a. Ho: u≤ 7 min vs H₁: 7 min, Reject Ho if Zeale > 2.326 b. Ho: μz 7 min vs H₁: μ<7 min, Reject Ho if Zeale > 2.326 (b) Calculate the value of the test statistic. (Round your answer to 2 decimal places.) Answer is complete but not entirely correct. zcalc 1.03
(c) Use Excel to find the p-value. (Round your answer to 4 decimal places.)
Answer is complete but not entirely correct.
p-value
0.1508
Transcribed Image Text:(c) Use Excel to find the p-value. (Round your answer to 4 decimal places.) Answer is complete but not entirely correct. p-value 0.1508
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