Question

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 (i.e., “reject” or “do not
reject”)?

Part (d)

Explain what the decision in part (c), i.e., “rejecting H0” or “not
rejecting H0” means in this context at a level that can be
understood by a senior in high school.

Answer #1

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?

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 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 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...

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:...

part (a)
Open the "Union Status and Income. xlsx" file that is posted
with the assignment. In order to test whether there is a difference
in the variance of income between Union members and non-Union
members, use Excel to carry out an "F-Test: Two-Sample for
variances" with Alpha =0.05
part (b)
Still using the "Union Status and Income .xlsx" file, carry out
a t-test in excel (with Alpha=0.05) that tests whether there is a
difference in mean income between Union...

For each of the questions below calculate (show all
work):
1) Null and alternative hypothesis
2) Cutoff score (α, dfBG,
dfE)
3) Sum of squares between- and within-groups (SSBG,
SSE)
4) Mean square between- and within-groups (MSBG,
MSE)
5) Fobt
6)Decision to retain or reject the null and write-up
A researcher is concerned about the level of knowledge possessed
by university students regarding United States history. Students
completed a high school senior level standardized U.S. history
exam. Major for students...

Each of three supermarket chains in the Denver area claims to
have the lowest overall prices. As part of an investigative study
on supermarket advertising, a local television station conducted a
study by randomly selecting nine grocery items. Then, on the same
day, an intern was sent to each of the three stores to purchase the
nine items. From the receipts, the following data was recorded. At
the 0.05 significance level, is there a difference in the mean
price for...

Each of three supermarket chains in the Denver area claims to
have the lowest overall prices. As part of an investigative study
on supermarket advertising, a local television station conducted a
study by randomly selecting nine grocery items. Then, on the same
day, an intern was sent to each of the three stores to purchase the
nine items. From the receipts, the following data were recorded. At
the 0.025 significance level, is there a difference in the mean
price for...

Professor Jennings claims that only 35% of the students at Flora
College work while attending school. Dean Renata thinks that the
professor has underestimated the number of students with part-time
or full-time jobs. A random sample of 76 students shows that 36
have jobs. Do the data indicate that more than 35% of the students
have jobs? Use a 5% level of significance.
What are we testing in this problem?
single mean
single proportion
(a) What is the level of...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 24 minutes ago

asked 35 minutes ago

asked 1 hour ago

asked 1 hour 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

asked 2 hours ago

asked 2 hours ago