business statstic and probability questions

6 Business Statistic questions

All questions must be answered manually— with the aid of a calculator, if necessary.

Question 2 (18 marks)

The general manager of a digital products manufacturer believes that 65% of all potential customers prefer to buy MP3 players with greater than 32 GB built-in memory. A random sample of 100 customers was chosen.

2 BUS B171 Business Statistics

c Suppose that among the 100 customers selected, 58 of them claimed that they prefer to buy MP3 players with over 32 GB built-in memory. Construct a 95% confidence interval estimate for the true proportion of potential customers who prefer to buy MP3 players with greater than 32 GB built-in memory. (6 marks)

Question 3 (15 marks)

The customer services manager of a bank wishes to estimate the true average time it takes for a customer service officer to serve a customer using the dial-in hotline services. A random sample of the service time for 14 individual customers is collected. The results are listed as follows (in minutes):

2.8 1.7 2.2 1.5 2.1 1.9 2.1 1.5 2.0 2.5 1.8 2.4 1.3 2.2

a Construct a 95% confidence interval estimate for the true average time it takes to serve a customer. Keep your final answers to two decimal places. (10 marks)

b Given that the service times are normally distributed and the population variance is known to be 0.25 minutes, what sample size is required if the manager wishes to be 95% confident that the sample average is correct to within 15.0± minutes of the true average service time? (5 marks)

Question 4 (16 marks)

The marketing director of a cosmetics corporation wishes to estimate the average monthly demand for a newly released night-mly selected. Twenty-five of them expressed the

Taidot: Matematiikka, Tilastotiede

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Tietoa työnantajasta:
( 73 arvostelua ) hong kong, Hong Kong

Projektin tunnus: #1733102

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I'm a specialist in statistics. I'm very familiar with these types problems.

$30 USD 1 päivässä
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Please check your inbox. Thanks

$30 USD 0 päivässä
(77 arvostelua)

Hi, Experienced statistician with strong academic background and expertise in statistical software's. Please see the PM for details. Thanks.

$35 USD 3 päivässä
(49 arvostelua)

Hi I am interested and I have lot of experience in similar work. I can do these questions right now with 100% correct. I am ready to start the job and will do with in 1 hour Let start Thanks

$30 USD 0 päivässä
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See PM,please.

$35 USD 4 päivässä
(35 arvostelua)

I am confident that I could solve your questions correctly as I have solved many of these kind of questions.

$40 USD 1 päivässä
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We have the required skills and expertise to complete the desired task. Check your inbox for further details.

$50 USD 3 päivässä
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Please find the answers in personal message.

$40 USD 2 päivässä
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Hey this project is in my domain

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Custom software development - The Administrator removed this message due to advertising which breaches our Terms and Conditions.

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