Catherine chao director of marketing research needs a

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Test 2 Ch 5-7 (1).rtf

Catherine Chao Director of Marketing Research needs a sample of households to from MS 1023 at University of Texas, San Antonio

27 .   On Saturdays , cars arrive at David Zebda 's Scrub and Shine Car Wash at the rate of 80 cars per hour during the ten - hour shift . David wants a sample of 40 Saturday customers to answer the long version of his quality service questionnaire . He randomly selects 9 as a starting point and instructs the crew to select the 9th customer and each customer at intervals of 20 ( 9 , 29 , 49 , etc. ) . His sample is a __________.
A ) convenience sample
B ) simple random sample
C ) unsystematic sample
D ) stratified sample
E ) systematic sample
28 .   Catherine Chao , Director of Marketing Research , needs a sample of households to participate in the testing of a new toothpaste package . She directs the seven members of her staff to find five households each . Catherine 's sample is a __ _ _ _ ________.
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29 .   The average age of a UTSA student is 25.6 years with a standard deviation of 8.3 years . If a random sample of 45 students were taken in a classroom with 300 students , what is the probability that the sample will have an average age of less than 28 years ?
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30 .   According to the central limit theorem , if a sample of size 56 is drawn from a population with a standard deviation of 14 , the standard error of the distribution of the sample means would equal _ ______.
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31 .   Suppose the population of all public Universities shows the annual parking fee per student is $ 110 with a standard deviation of $ 18 . If a random sample of size 49 is drawn from the population , the probability of drawing a sample with a mean of more than $ 115 is _______.
A ) 0.9738
B ) 0.4738
C ) 0.0262
D ) 0.3897
E ) 0.1103
32 .   Suppose the population of all public Universities shows the annual parking fee per student is $ 110 with a standard deviation of $ 18 . If a random sample of size 49 is drawn from the population , the probability of drawing a sample with a mean of less than $ 92 is _ ______.
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33 .   Suppose the population of all public Universities shows the annual parking fee per student is $ 110 with a standard deviation of $ 18 . If a random sample of size 49 is drawn from the population , the probability of drawing a sample with a sample mean between $ 100 and $ 115 is _______.
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34 .   Suppose 40 % of the population of pre-teens have a TV in their bedroom . If a random sample of 500 pre-teens is drawn from the population , then the probability that 44 % or fewer of the pre-teens have a TV in their bedroom is _______.
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Mathematical Excursions
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Chapter 13 / Exercise 46
Mathematical Excursions
Aufmann
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28.Catherine Chao, Director of Marketing Research, needs a sample of households to participate in the testing of a new toothpaste package. She directs the seven members of her staff to find five households each. Catherine's sample is a _____________.A)cluster sampleB)proportionate stratified sampleC)quota sampleD)disproportionate stratified sampleE)simple random sample
29.The average age of a UTSA student is 25.6 years with a standard deviation of 8.3 years. If a random sample of 45 students were taken in a classroom with 300 students, what is the probability that the sample will have an average age of less than 28 years?
30.According to the central limit theorem, if a sample of size 56 is drawn from a population with a standard deviation of 14, the standard error of the distribution of the sample meanswould equal _______.
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We have textbook solutions for you!
The document you are viewing contains questions related to this textbook.
Mathematical Excursions
The document you are viewing contains questions related to this textbook.
Chapter 13 / Exercise 46
Mathematical Excursions
Aufmann
Expert Verified
31.Suppose the population of all public Universities shows the annual parking fee per student is $110 with a standard deviation of $18. If a random sample of size 49 is drawn from the population, the probability of drawing a sample with a mean of more than $115 is _______.
32.Suppose the population of all public Universities shows the annual parking fee per student is $110 with a standard deviation of $18. If a random sample of size 49 is drawn from the population, the probability of drawing a sample with a mean of less than $92 is _______.A)0.3400B)0.1600C)0.0000D)1.0000E)0.7000
33.Suppose the population of all public Universities shows the annual parking fee per student is $110 with a standard deviation of $18. If a random sample of size 49 is drawn from the population, the probability of drawing a sample with a sample mean between $100 and $115 is _______.
34.Suppose 40% of the population of pre-teens have a TV in their bedroom. If a random sample of 500 pre-teens is drawn from the population, then the probability that 44% or fewer of the pre-teens have a TV in their bedroom is _______.
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