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 in 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 means repair cost was $3,750 with the sample standard deviation of $600. Find the test statistic for this hypothesis test. tStat=____ Is there sufficient evidence to reject the null hypothesis using α=0.05? A. Do not reject the null hypothesis. There is insufficient evidence at the 0.05 level of significance that the population mean cost is greater than $3,927. B. Do not reject the null hypothesis. There is insufficient evidence at the 0.05 level of significance that the population means the cost is less than $3,927. C. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is less than$3,927. D. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is greater than $3,927. The p-value is ___. What does this p-value mean given the results of part (a)? A.The p-value is the probability that the actual mean cost is$3,750 or less. B. The p-value is the probability that the actual mean cost is $3,927 or less given the sample mean cost is $3,750. C. The p-value is the probability of getting a sample mean cost of $3,750 or less if the actual mean cost is $3,927. D. The p-value is the probability that the actual mean cost is more than $3,750.
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 in 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 means repair cost was $3,750 with the sample standard deviation of $600. Find the test statistic for this hypothesis test. tStat=____ Is there sufficient evidence to reject the null hypothesis using α=0.05? A. Do not reject the null hypothesis. There is insufficient evidence at the 0.05 level of significance that the population mean cost is greater than $3,927. B. Do not reject the null hypothesis. There is insufficient evidence at the 0.05 level of significance that the population means the cost is less than $3,927. C. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is less than$3,927. D. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is greater than $3,927. The p-value is ___. What does this p-value mean given the results of part (a)? A.The p-value is the probability that the actual mean cost is$3,750 or less. B. The p-value is the probability that the actual mean cost is $3,927 or less given the sample mean cost is $3,750. C. The p-value is the probability of getting a sample mean cost of $3,750 or less if the actual mean cost is $3,927. D. The p-value is the probability that the actual mean cost is more than $3,750.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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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
Find the test statistic for this hypothesis test.
tStat=____
Is there sufficient evidence to reject the null hypothesis using
B. Do not reject the null hypothesis. There is insufficient evidence at the 0.05 level of significance that the population means the cost is less than $3,927.
C. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is less than$3,927.
D. Reject the null hypothesis. There is sufficient evidence at the 0.05 level of significance that the population means the cost is greater than $3,927.
A.The p-value is the probability that the actual mean cost is$3,750 or less.
B. The p-value is the probability that the actual mean cost is $3,927 or less given the sample mean cost is $3,750.
C. The p-value is the probability of getting a sample mean cost of $3,750 or less if the actual mean cost is $3,927.
D. The p-value is the probability that the actual mean cost is more than
α=0.05?
A. Do not reject the null hypothesis. There is insufficient evidence at the
0.05 level of significance that the population mean cost is greater than
$3,927.
The p-value is ___.
What does this p-value mean given the results of part (a)?
$3,750.
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