Basic Business Statistics, Student Value Edition (13th Edition)
13th Edition
ISBN: 9780321946393
Author: Mark L. Berenson, David M. Levine, Kathryn A. Szabat
Publisher: PEARSON
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Chapter 1, Problem 20PS
For a study that consists of personal interviews with participants (rather than mail or phone surveys), explain why simple random sampling might be less practical than some other sampling methods.
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You are interested in the difference between two population means. Both populations are normally distributed, and the population variances σ1212 and σ2222 are known. You use an independent samples experiment to provide the data for your study. What is the appropriate test statistic?
t = x̄Dx̄D/ √[sD2sD2(1/n1n1 + 1/n2n2)]
F = s1s1/s2s2
z = (x̄1x̄1 – x̄2x̄2) / √[σ1212/n1n1 + σ2222/n2n2]
t = (x̄1x̄1 – x̄2x̄2) / √[sp2sp2(1/n1n1 + 1/n2n2)]
Suppose instead that the populations are not normally distributed. The test statistic given is still appropriate provided that .
You are interested in the difference between two population means. The population variances σ1212 and σ2222 are unknown and equal. You use an independent samples experiment to generate the data for your study, and each of your samples meet the large sample requirement. What is the appropriate test statistic?
z = (x̄1x̄1 – x̄2x̄2) / √[σ1212/n1n1 + σ2222/n2n2]
t =…
Find mean median mode and midrange of data set 1600, 1900, 1850, 1900, 1650, 1050, 1900, 1800, 1050, 1350, 1900, 1450
In an effort to better manage his inventory levels, the owner of two steak and seafood restaurants, both located in the same city, hires a statistician to
conduct a statistical study. The owner is interested in whether the restaurant located on the south side sells more halibut fillets per night than the
restaurant located on the north side of the city.
The statistician selects a random sample of size n₁ = 31 nights that the southside restaurant is open. For each night in the sample, she collects data
on the number of halibut fillets sold at the southside location and computes the sample mean X₁ = 14.93 and the sample variance s² = 24. Likewise,
she selects a random sample of size П₂ = 37 nights that the northside restaurant is open. For each night in the sample, she collects data on the
number of halibut fillets sold at the northside location and computes the sample mean X2 = 13.48 and the sample variance s² = 21.
The statistician conducts an F-test of the ratio of two variances, and…
Chapter 1 Solutions
Basic Business Statistics, Student Value Edition (13th Edition)
Ch. 1 - Four different beverages are sold at a fast-food...Ch. 1 - U. S. businesses are listed by size small medium,...Ch. 1 - The time it takes to download a video from the...Ch. 1 - For each of the following variables, determine...Ch. 1 - The following information is collected from...Ch. 1 - For each of the following variables, determine...Ch. 1 - For each of the following variables, determine...Ch. 1 - Suppose the following information is collected...Ch. 1 - One of the variables most often included in...Ch. 1 - If two students score a 90 on the same...
Ch. 1 - The director of market research at a large...Ch. 1 - Visit the website of the Pew Research organization...Ch. 1 - Transportation engineers and planners want to...Ch. 1 - Visit the home page of the Statistics Portal...Ch. 1 - For a population containing N=902 individual, what...Ch. 1 - For a population of N=902, verify that by starting...Ch. 1 - Given a population of N=93, starting in row 29,...Ch. 1 - For a study that consists of personal interviews...Ch. 1 - You want to select a random sample of n=1 from a...Ch. 1 - A population has four members (called A, B, C, and...Ch. 1 - The registrar of a university with a population of...Ch. 1 - Prenumbered sales invoices are kept in a sales...Ch. 1 - Prob. 25PSCh. 1 - A Survey indicates that the vast majority of...Ch. 1 - A simple random sample of n=300 full–time...Ch. 1 - The results of a 2013 Adobe system study on retail...Ch. 1 - Prob. 29PSCh. 1 - Prob. 30PSCh. 1 - What is the difference between a sample and a...Ch. 1 - What is the difference between a statistic and...Ch. 1 - What is the difference between a categorical...Ch. 1 - What is the difference between a discrete...Ch. 1 - What is the difference between a nominal scaled...Ch. 1 - What is difference between an interval scaled...Ch. 1 - What is the difference between probability...Ch. 1 - Visit the official website for either Excel...Ch. 1 - Prob. 39PSCh. 1 - The Gallup organization releases the results of...Ch. 1 - Prob. 41PSCh. 1 - Prob. 43PSCh. 1 - Three professors examined awareness of four widely...Ch. 1 - A manufacturer of cat food is planning to survey...
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