Question

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 $74.06. The population standard deviation for the repair of type I ovens is known to be $11.92. A sample of 31 type II ovens has a mean repair cost of $67.45. The population standard deviation for the repair of type II ovens is known to be $18.56. Conduct a hypothesis test of the technician's claim at the 0.05 level of significance. Let μ1 be the true mean repair cost for type I ovens and μ2 be the true mean repair cost for type II ovens.

Answer #1

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 51 type I ovens has a mean repair cost of $87.59. The
population standard deviation for the repair of type I ovens is
known to be $20.27. A sample of 34 type II ovens has a mean repair
cost of $84.62....

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, with a
standard deviation of $12.35. A sample of 48 type II ovens has a
mean repair cost of $67.84, with a standard deviation of $21.72.
Conduct a hypothesis test...

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 43 type I ovens has a mean repair cost of $70.15. The
population standard deviation for the repair of type I ovens is
known to be $20.62. A sample of 57 type II ovens has a mean repair
cost of $65.36....

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. The
population standard deviation for the repair of type I ovens is
known to be $10.60. A sample of 31 type II ovens has a mean repair
cost of $77.38....

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 69 type I ovens has a mean repair cost of $86.44, with a
standard deviation of $12.97. A sample of 65 type II ovens has a
mean repair cost of $80.47, with a standard deviation of $11.66.
Conduct a hypothesis test...

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 58 type I ovens has a mean repair cost of $88.52, with a
standard deviation of 23.72. A sample of 49 type II ovens has a
mean repair cost of $86.20$86.20, with a standard deviation of
$14.32. Conduct a hypothesis test...

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 5151 type I ovens has a mean repair cost of
$87.59$87.59, with a standard deviation of $20.27$20.27. A sample
of 3434 type II ovens has a mean repair cost of $84.62$84.62, with
a standard deviation of $20.46$20.46. Conduct a hypothesis test...

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 37 type I ovens has a mean repair cost of
$70.68. The population standard deviation for the
repair of type I ovens is known to be $19.05. A
sample of 40 type II ovens has a mean repair cost of $64.02....

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 58 type I ovens has a mean repair cost of $84.57, with a
standard deviation of $12.03. A sample of 72 type II ovens has a
mean repair cost of $81.69, with a standard deviation of $11.91.
Conduct a hypothesis test...

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 $70.10, with a standard deviation
of $19.40. A sample of 49 type II ovens
has a mean repair cost of $63.21, with a
standard deviation of $12.29. Conduct a hypothesis
test...

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