Question

A marketing researcher wants to estimate the mean amount spent ($) on a certain retail website by members of the website's premium program. A random sample of

95 members of the website's premium program who recently made a purchase on the website yielded a mean of $2000 and a standard deviation of $150.

Complete parts (a) and (b) below.

A ___ < U < ____

b. Interpret the interval constructed in (a).

Choose the correct answer below.

A.The sample mean spending in 90% of all samples of 95 members of the website's premium program will be between the lower and upper limits of the confidence interval.

B.With 90% confidence, the mean spending in dollars for all shoppers who are members of the website's premium program is between the lower and upper limits of the confidence interval.

C. 90% of all shoppers who are members of the website's premium program have spent an amount in dollars that is between the lower and upper limits of the confidence interval.

D.There is a 90% probability that mean spending in dollars for all shoppers who are members of the website's premium program is between the lower and upper limits of the confidence interval.

Answer #1

A marketing researcher wants to estimate the mean savings ($)
realized by shoppers who showroom. Showrooming is the practice of
inspecting products in retail stores and then purchasing the
products online at a lower price. A random sample of
64
shoppers who recently purchased a consumer electronics item
online after making a visit to a retail store yielded a mean
savings of
$54
and a standard deviation of
$47.
Complete parts (a) and (b).
a.
Construct a
90%
confidence interval...

question 1. A marketing specialist wants to
estimate the average amount spent by visitors to an online
retailer's newly-designed website. From the data in a preliminary
study she guesses that the standard deviation of the amount spent
is about 16 dollars.
How large a sample should she take to estimate the mean amount
spent to within 4 dollars with 95% confidence? (Round your answer
up to the next largest integer).
______
question 2. Pepsi wants to use this technique
to...

A] this problem requires PhStat solution. A marketing researcher
wants to estimate the mean amount spent ($) on Amazon.com by Amazon
Prime member shoppers. Suppose a random sample of 100 Amazon Prime
member shoppers who recently made a purchase on Amazon.com yielded
a mean amount spent of $1,500 and a standard deviation of $200. 1.
Using a 0.05 level of significance, state your decision.
2. Using the critical value approach, is there evidence that the
population mean amount spent on...

A marketing researcher wants to estimate the mean savings ($)
realized by shoppers who showroom. Showrooming is the practice of
inspecting products in retail stores and then purchasing the
products online at a lower price. A random sample of 100 shoppers
who recently purchased a consumer electronics item online after
making a visit to a retail store yielded a mean savings of $58 and
a standard deviation of $55.
a. Construct a 95% confidence interval estimate for the mean
savings...

A marketing specialist wants to estimate the average amount
spent by visitors to an online retailer's newly-designed website.
From the data in a preliminary study she guesses that the standard
deviation of the amount spent is about 12 dollars.
Question 1. How large a sample should she take
to estimate the mean amount spent to within 5 dollars with 95%
confidence? (Round your answer up to the next largest integer).

A marketing specialist wants to estimate the average amount
spent by visitors to an online retailer's newly-designed website.
From the data in a preliminary study she guesses that the standard
deviation of the amount spent is about 14 dollars.
Question 1. How large a sample should she take
to estimate the mean amount spent to within 6 dollars with 95%
confidence? (Round your answer up to the next largest integer).

A marketing specialist wants to estimate the average amount
spent by visitors to an online retailers newly-designed website.
From the data in a preliminary study she guesses that the standard
deviation of the amount spent is about 14 dollars.
Question 1. How large a sample should she take
to estimate the mean amount spent to within 5 dollars with 90%
confidence? (Round your answer up to the next largest integer).

A marketing specialist wants to estimate the average amount
spent by visitors to an online retailer's newly-designed website.
From the data in a preliminary study she guesses that the standard
deviation of the amount spent is about 12
dollars.
Question 1. How large a sample should she take
to estimate the mean amount spent to within 3
dollars with 90% confidence? (Round your answer up
to the next largest integer).

A marketing specialist wants to estimate the average amount
spent by visitors to an online retailer's newly-designed website.
From the data in a preliminary study she guesses that the standard
deviation of the amount spent is about 12 dollars.
Question 1. How large a sample should she take
to estimate the mean amount spent to within 2 dollars with 99%
confidence? (Round your answer up to the next largest integer).

The table below contains the amount that a sample of nine
customers spent for lunch ($) at a fast-food restaurant. Complete
parts a and b below.
4.87 5.08 5.84 6.14 7.32 7.58 8.22 8.67 9.33
a. Construct a 95% confidence interval estimate for the
population mean amount spent for lunch at a fast-food restaurant,
assuming a normal distribution. The % confidence interval estimate
is from $??? to $???. (Round to two decimal places as
needed.)
b. Interpret the interval constructed...

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