Question

Chicken Delight claims that 97% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 80 orders revealed that 74 were delivered within the promised time. At the 0.05 significance level, can we conclude that less than 97% of the orders are delivered in less than 10 minutes? (a) What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.) Reject Ho if z < (b) Compute the value of the test statistic. (Round the intermediate values and final answer to 2 decimal places.) Value of the test statistic (c) What is your decision regarding the null hypothesis? Reject or Cannot reject: H0 : π ≥ 0.97

Answer #1

a)

Decision rule : reject Ho if test statistic z < -1.64 |

b)

value of the test statistic z =-2.36

c)

as test statistic falls in rejection region, reject Ho

Chicken Delight claims that 96% of its orders are delivered
within 10 minutes of the time the order is placed. A sample of 70
orders revealed that 64 were delivered within the promised time. At
the 0.01 significance level, can we conclude that less than 96% of
the orders are delivered in less than 10 minutes?
(a) What is the decision rule? (Negative amount should be indicated
by a minus sign. Round your answer to 2 decimal places.)
Reject Ho...

Chicken Delight claims that 64% of its orders are delivered
within 10 minutes of the time the order is placed. A sample of 100
orders revealed that 58 were delivered within the promised time. At
the 0.10 significance level, can we conclude that less than 64% of
the orders are delivered in less than 10 minutes?
a. What is your decision regarding the below
hypothesis? (Round the final answer to 2 decimal
places.)
H0 is rejected if z
< ...

Chicken Delight claims that 92% of its orders are delivered
within 10 minutes of the time the order is placed. A sample of 80
orders revealed that 70 were delivered within the promised time. At
the 0.01 significance level, can we conclude that less than 92% of
the orders are delivered in less than 10 minutes?
A.) What is the decision rule? (Negative amount should
be indicated by a minus sign. Round your answer to 2 decimal
places.)
B.) Compute...

Chicken Delight claims that 91% of its orders are delivered
within 10 minutes of the time the order is placed. A sample of 90
orders revealed that 81 were delivered within the promised time. At
the 0.10 significance level, can we conclude that less than 91% of
the orders are delivered in less than 10 minutes?
What is the decision rule? (Negative amount should be
indicated by a minus sign. Round your answer to 2 decimal
places.)
Compute the value...

Chicken Delight claims that 90% of its orders are delivered
within 10 minutes of the time the
order is placed. A sample of 100 orders revealed that 92 were
delivered within the promised
time. At the .10 significance level, can we conclude that more than
90% of the orders are
delivered in less than 10 minutes?

Question 1
Part (a)
Chicken Delight claims that at least 90 percent of its orders are
delivered within 5 minutes of the time the order was placed. A
sample of 50 orders revealed that 42 of them were delivered within
5 minutes. Using a level of significance of 0.05, carry out a
hypothesis test for Chicken Delight’s claim.
Part (b)
What percentage of orders was delivered within 5 minutes in Part
(a)?
Part (c)
What is the decision regarding H0...

An airline claims that its flights are consistently on time with
an average delay of at most 11 minutes. It claims that the average
delay is so consistent that the variance is no more than 92
minutes. Doubting the consistency part of the claim, a disgruntled
traveler calculates the delays for his next 25 flights. The average
delay for those 25 flights is 23 minutes with a standard deviation
of 17 minutes. Assume α = 0.05. Is the traveler disputing...

A manufacturer claims that the mean life time of its lithium
batteries is 1500 hours . A home owner selects 30 of these
batteries and finds the mean lifetime to be 1470 hours with a
standard deviation of 80 hours. Test the manufacturer's claim.
Use=0.05. Round the test statistic to the nearest thousandth.
a) Hypothesis:
b)Critical value (t critical):
c)Test statistic (tstat) and the decision about the test
statistic:(reject or fail to reject Ho):
d)Conclusion that results from the decision...

A pizza place recently hired additional drivers and as a result
now claims that its average delivery time for orders is under 45
minutes. A sample of 40 customer deliveries was examined, and the
average delivery time was found to be 40.2 minutes. Historically,
the standard deviation for delivery time is 10.5 minutes. Using
alpha=0.01, complete parts a and b below. a. Does this sample
provide enough evidence to support the delivery time claim made by
the pizza place? Determine...

In an advertisement, a pizza shop claims its mean delivery time
is 30 minutes. A consumer group believes that the mean delivery
time is greater than the pizza shop claims. A random sample of 41
delivery times has a mean of 31.5 minutes with standard deviation
of 3.5 minutes. Does this indicate at a 5% significance level that
the mean delivery time is longer than what the pizza shop
claims?
Step 1: State the null and alternative hypothesis.
Step 2:...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 16 minutes ago

asked 17 minutes ago

asked 22 minutes ago

asked 27 minutes ago

asked 36 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago