A report getting exper Hybrid repair, replacing the hy cost of repa ng a hybrid venicle is ming even while typical inverter assembly, had a mean repair cost of $3,927 in 2012. Industry experts suspect that the cost will continue to decrease given the increase in the number of technicians who have gained expertise on fixing gas-electric engines in recent months. Suppose a sample of 100 hybrid inverter assembly repairs completed in the last month was selected. The sample mean repair cost was $3,860 with the sample standard deviation of $500. Complete parts (a) and (b) below. a. Is there evidence that the population mean cost is less than $3,927? (Use a 0.05 level of significance.) State the null and alternative hypotheses. Ho: HS H₁: HS (Type integers or decimals.) A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 351 patients showe the mean wait time was 23.07 minutes, with a standard deviation of 16.18 minutes. Complete parts (a) and (b) below.

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Chapter1: Starting With Matlab
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A report states that the cost of repairing a hybrid vehicle is falling even while typical repairs on conventional vehicles are getting more expensive. The most common hybrid repair, replacing the hybrid
inverter assembly, had a mean repair cost of $3,927 in 2012. Industry experts suspect that the cost will continue to decrease given the increase in the number of technicians who have gained
expertise on fixing gas-electric engines in recent months. Suppose a sample of 100 hybrid inverter assembly repairs completed in the last month was selected. The sample mean repair cost was
$3,860 with the sample standard deviation of $500. Complete parts (a) and (b) below.
a. Is there evidence that the population mean cost is less than $3,927? (Use a 0.05 level f significance.)
State the null and alternative hypotheses.
Ho: HS
H₁: H
▼S
(Type integers or decimals.)
A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 351 patients showed
the mean wait time was 23.07 minutes, with a standard deviation of 16.18 minutes. Complete parts (a) and (b) below.
a. If you test the null hypothesis at the 0.01 level of significance, is there evidence that the population mean wait time is less than 25 minutes?
State the null and alternative hypotheses.
O A. Ho: <25
H₁:μ225
O D. Ho:μ ≥25
H₁: μ#25
OB. Ho: <25
H₁:μ>25
O E. Ho: μ*25
H₁:μ ≥25
OC. Ho: μ225
H₁:μ<25
OF. Ho: μ>25
H₁: μ<25
Transcribed Image Text:A report states that the cost of repairing a hybrid vehicle is falling even while typical repairs on conventional vehicles are getting more expensive. The most common hybrid repair, replacing the hybrid inverter assembly, had a mean repair cost of $3,927 in 2012. Industry experts suspect that the cost will continue to decrease given the increase in the number of technicians who have gained expertise on fixing gas-electric engines in recent months. Suppose a sample of 100 hybrid inverter assembly repairs completed in the last month was selected. The sample mean repair cost was $3,860 with the sample standard deviation of $500. Complete parts (a) and (b) below. a. Is there evidence that the population mean cost is less than $3,927? (Use a 0.05 level f significance.) State the null and alternative hypotheses. Ho: HS H₁: H ▼S (Type integers or decimals.) A hospital was concerned about reducing its wait time. A targeted wait time goal of 25 minutes was set. After implementing an improvement framework and process, a sample of 351 patients showed the mean wait time was 23.07 minutes, with a standard deviation of 16.18 minutes. Complete parts (a) and (b) below. a. If you test the null hypothesis at the 0.01 level of significance, is there evidence that the population mean wait time is less than 25 minutes? State the null and alternative hypotheses. O A. Ho: <25 H₁:μ225 O D. Ho:μ ≥25 H₁: μ#25 OB. Ho: <25 H₁:μ>25 O E. Ho: μ*25 H₁:μ ≥25 OC. Ho: μ225 H₁:μ<25 OF. Ho: μ>25 H₁: μ<25
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