Question

A company is researching the effectiveness of a new website design to decrease the time to access a website. Five website users were randomly selected, and their times (in seconds) to access the website with the old and new designs were recorded. To compare the times, they computed (new website design time − old website design time). The results are shown below. User Old Website Design New Website Design A 30 25 B 45 30 C 25 20 D 32 30 E 28 27 For a 0.01 significance level, which of the following is the correct decision regarding the hypothesis that the training was effective in improving customer relationships? Multiple Choice Reject the null hypothesis and conclude that the new design reduced the mean access times. Fail to reject the null hypothesis and conclude that the mean access times are inaccurate. Fail to reject the null hypothesis. Reject the null hypothesis and conclude that the new design did not reduce the mean access times.

Answer #1

MC Qu. 11-52 A company is researching the effectiveness...
A company is researching the effectiveness of a new website
design to decrease the time to access a website. Five website users
were randomly selected, and their times (in seconds) to access the
website with the old and new designs were recorded. To compare the
times, they computed (new website design time − old website design
time). The results are shown below.
User
Old Website
Design
New Website
Design
A
30...

a company is researching the effectiveness of a new website
deign to decrease the time to access a website. Five website users
were randomly selected and their times (in seconds) to access the
website with the old and new designs were recorded. The results
follow
User - Old Website Design - New Website Design
A 30 15
B 45 20
C 25 10
D 32 25
E 28 20
Let a ALPHA = 0.05. Is the mean time to access...

A business analyst wants to know if a new website design
compared to an old website design is showing increased page views
per visit. Two different samples of customers are randomly sent to
one of two different websites, offering the same products, but with
different designs. Is there a difference in average page views
between the new and old website design?
Use data from "website" sheet in excel. Run the
appropriate statistical test using α=0.01 . Which of the following...

Good website design can make Web navigation easier. The
following article presents a comparison of item recognition between
two designs. A sample of 12 users using a conventional Web design
averaged 27.3 items identified, with a standard deviation of 7.48.
A sample of 12 users using a new structured Web design averaged
38.7 items identified, with a standard deviation of 6.4. Can we
conclude that the mean number of items identified is greater with
the new structured design?

A business analyst wants to know if a new website design
compared to an old website design is showing increased page views
per visit. Two different samples of customers are randomly sent to
one of two different websites, offering the same products, but with
different designs. Is there a difference in average page views
between the new and old website design?
Use data from "website" sheet in excel. Which
of the following was the p-value you used for this statistical...

Questions 11 and 12 are based on the following information: An
investigation of the effectiveness of a training program to improve
customer relationships included a pre-training and post-training
customer survey, 12 customers were randomly selected to score the
customer relationships both before and after the training. The
differences of scores are calculated as the post-training survey
score minus the pre-training survey score. The sample mean
difference of scores is 0.5. The test statistic is 1.03 for testing
whether the population...

Questions11and12 are based on the following information: An
investigation of the effectiveness of a training program to improve
customer relationships included a pre-training and post-training
customer survey, 12 customers were randomly selected to score the
customer relationships both before and after the training. The
differences of scores are calculated as the post-training survey
score minus the pre-training survey score. The sample mean
difference of scores is 0.5. The test statistic is 1.03 for testing
whether the population mean difference µD...

In a test of the effectiveness of a new battery design, 16
battery-powered music boxes are
randomly provided with either the old design or the new version.
Hours of playing time before
battery failure were as follows:
8 boxes new battery type
3.3 6.4 3.9 5.4 5.1 4.6 4.9 7.2 hours
8 boxes old battery type
4.2 2.9 4.5 4.9 5.0 5.1 3.2 4.0 hours
Assuming normal populations with equal standard deviations, use
0.10 level to determine
whether the new...

A market analyst wants to know if the new website he designed is
showing increased page views per visit. A customer is randomly sent
to one of two different websites, offering the same products, but
with different designs. The accompanying table shows the data from
five randomly chosen customers from each website. Assume that the
data come from a distribution that is Normally distributed.
Complete parts a through c below.
LOADING...
Click the icon to view the data table of...

Ross has created a puzzle game that he believes will take 30
minutes for a player to complete. A week after the game's release,
he collects data for a random sample of 20 players on how long they
took to complete the game. These times, in minutes, are shown in
the following table.
Use Excel to test whether the mean time to complete the game is
different from 30 minutes, and then draw a conclusion in the
context of the...

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