Question

The management of White Industries is considering a new method of assembling its golf carts. The present method requires an average of 42.3 minutes to assemble a cart. The mean assembly time for a random sample of 25 carts, using the new method, was 41.0 minutes. From historical information, the population standard deviation is known to be 2.7 minutes. Using an alpha value of .10, can we conclude that the assembly time using the new method is different than it was using the current method? The hypothesis statements for this problem are: H0: μ = 42.3 H1: μ ≠ 42.3

Use the p-Value Method. Note that if you do not use the p-Value method you will receive no credit for this problem.

Answer #1

The management of White Industries is considering a new method
of assembling its golf cart. The present method requires 62.3
minutes, on the average, to assemble a cart. The mean assembly time
for a random sample of 20 carts, using the new method, was 60.6
minutes, and the standard deviation of the sample was 3.1 minutes.
Using the 0.02 level of significance, can we conclude that the
assembly time using the new method is faster?
a. What is the decision...

The management of White Industries is considering a new method
of assembling its golf cart. The present method requires 50.3
minutes, on the average, to assemble a cart. The mean assembly time
for a random sample of 60 carts, using the new method, was 48.6
minutes, and the standard deviation of the sample was 2.8
minutes.
Using the 0.10 level of significance, can we conclude that the
assembly time using the new method is faster?
a. What is the decision...

The operations manager of Slug Computers is considering a new
method of assembling its Mollusk Computer. The present method
requires 42.3 minutes, on average to assemble the speedy computer.
The new method was introduced and a random sample of 24 computers
revealed a mean assembly time of 40.6 minutes with a standard
deviation of 2.7 minutes, the distribution is normal.
At the .10 level of significance, can we conclude the new method
is faster, on average?
Estimate the p value....

Moen has instituted a new manufacturing process for assembling a
component. Using the old process, the average assembly time was
4.25 minutes per component. After the new process was in place for
30 days, the quality control engineer took a random sample of
fourteen components and noted the time it took to assemble each
component. Based on the sample data, the average assembly time was
4.38 minutes, with a standard deviation of .16 minutes. Using a
significance level of .02,...

The commercial for the new Meat Man Barbecue claims that it
takes 9 minutes for assembly. A consumer advocate thinks that the
assembly time is lower than 9 minutes. The advocate surveyed 13
randomly selected people who purchased the Meat Man Barbecue and
found that their average time was 8.5 minutes. The standard
deviation for this survey group was 2.3 minutes. What can be
concluded at the the αα = 0.10 level of significance level of
significance?
For this study,...

The commercial for the new Meat Man Barbecue claims that it
takes 20 minutes for assembly. A consumer advocate thinks that the
assembly time is lower than 20 minutes. The advocate surveyed 14
randomly selected people who purchased the Meat Man Barbecue and
found that their average time was 17.4 minutes. The standard
deviation for this survey group was 3.6 minutes. What can be
concluded at the the αα = 0.01 level of significance level of
significance?
For this study,...

The commercial for the new Meat Man Barbecue claims that it
takes 12 minutes for assembly. A consumer advocate thinks that the
assembly time is lower than 12 minutes. The advocate surveyed 15
randomly selected people who purchased the Meat Man Barbecue and
found that their average time was 10.1 minutes. The standard
deviation for this survey group was 2.2 minutes. What can be
concluded at the the αα = 0.01 level of significance level of
significance?
For this study,...

B. GoGolf Ltd sells one type of golf cart. Its financial year
ends on the 30 June and it commenced the financial year with 40
golf carts that cost $2200 each. GoGolf uses the FIFO method and
had the following transactions throughout the financial year.
(i) On 30 July it acquired 35 golf carts on credit at $2250
each.
(ii) On 4 August it paid for the purchase made on 30 July and
received a 2.5% discount for early payment....

The commercial for the new Meat Man Barbecue claims that it
takes 8 minutes for assembly. A consumer advocate thinks that the
assembly time is different than 8 minutes. The advocate surveyed 10
randomly selected people who purchased the Meat Man Barbecue and
found that their average time was 6.5 minutes. The standard
deviation for this survey group was 3.6 minutes. What can be
concluded at the the αα = 0.01 level of significance level of
significance?
For this study,...

Q1. State the null and alternative hypotheses. A customer
service center claims the mean time a customer is "on hold" is less
than 2 minutes.
(a) H0: μ = 2 H1: μ <
2
(b) H0: μ < 2 H1: μ =
2
(c) H0: μ = 2 H1: μ >
2
(d) H0: μ > 2 H1: μ =
2
Q2. You are testing the claim that the mean cost of a new car is
more than $25,200. How...

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