Question
In: Statistics and Probability
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type II ovens. A sample of 6060 type I ovens has a mean repair cost of $74.85$74.85, with a standard deviation of $21.44$21.44. A sample of 4747 type II ovens has a mean repair cost of $72.23$72.23, with a standard deviation of $21.18$21.18. Conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. Let μ1μ1 be the true mean repair cost for type I ovens and μ2μ2 be the true mean repair cost for type II ovens.
Step 1 of 4 : State the null and alternative hypotheses for the test.
Step 2 of 4: Compute the value of the test statistic. Round your answer to two decimal places.
Step 3 of 4: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to two decimal places.
Step 4 of 4: Make the decision for the hypothesis test.
Solutions
Expert Solution
There is sufficient evidence to support the claim that the repair cost for type I ovens is greater than the repair cost for type II ovens.
orchestra answered 1 year agoRelated Solutions
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 54 type I ovens has a mean repair cost of $80.93. The
population standard deviation for the repair of type I ovens is
known to be $16.07. A sample of 35 type II ovens has a mean repair
cost of $74.68....
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 59 type I ovens has a mean repair cost of $71.68, with a
standard deviation of $15.08. A sample of 48 type II ovens has a
mean repair cost of $66.21, with a standard deviation of $10.25.
Conduct a hypothesis test...
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 40 type I ovens has a mean repair cost of $83.73, with a
standard deviation of $10.60. A sample of 31 type II ovens has a
mean repair cost of $77.38, with a standard deviation of $17.35.
Conduct a hypothesis test...
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 56 type I ovens has a mean repair cost of $76.66, with a
standard deviation of $18.63. A sample of 75 type II ovens has a
mean repair cost of $72.66, with a standard deviation of $22.09.
Conduct a hypothesis test...
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 34 type I ovens has a mean repair cost of $70.86. The
population standard deviation for the repair of type I ovens is
known to be $12.35. A sample of 48 type II ovens has a mean repair
cost of $67.84....
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 34 type I ovens has a mean repair cost of $71.37, with a
standard deviation of $18.58. A sample of 31 type II ovens has a
mean repair cost of $66.93, with a standard deviation of $24.60.
Conduct a hypothesis test...
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 61 type I ovens has a mean repair cost of $80.58. The
population standard deviation for the repair of type I ovens is
known to be $17.46. A sample of 64 type II ovens has a mean repair
cost of $73.27....
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares repair costs for two types of microwave
ovens (type I and type II). He believes that the repair cost for
type I ovens is greater than the repair cost for type II ovens. A
sample of 60 type I ovens has a mean repair cost of $76.43$, with a
standard deviation of $17.12. A sample of 46 type II ovens has a
mean repair cost of $69.23, with a standard deviation of $19.14.
Conduct a hypothesis test...
A technician compares repair costs for two types of microwave ovens (type I and type II)....
A technician compares
repair costs for two types of microwave ovens (type I and type II).
He believes that the repair cost for type I ovens is greater than
the repair cost for type II ovens. A sample of 5959 type I ovens
has a mean repair cost of $73.27$73.27, with a standard deviation
of $10.76$10.76. A sample of 4747 type II ovens has a mean repair
cost of $69.22$69.22, with a standard deviation of $23.21$23.21.
Conduct a hypothesis test...
In a random sample of five microwave ovens, the mean repair cost was $65.00 and the...
In a random sample of five microwave ovens, the mean repair
cost was $65.00 and the standard deviation was $13.50. Assume the
population is normally distributed and use a t-distribution to
construct a 90% confidence interval for the population mean mu.
What is the margin of error of mu? Interpret the results. The 90%
confidence interval for the population mean mu is ( nothing,
nothing). (Round to two decimal places as needed.)
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