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Unformatted text preview: ted that in
order to perform various statistical tests, the data must be distributed according to normal
distribution. In order to determine whether the selling prices of homes included in the random
sample are normally distributed, the data is divided into 6 classes of equal size and the
number of observations in each class is recorded. The chisquare goodness of fit test for
normal distribution is performed and the results are summarized in the following table: What is the appropriate null hypothesis?
A. H0: The residential home selling prices are distributed according to normal distribution.
B. H0: The residential home selling prices are not distributed according to normal distribution.
C. H0: The distribution of residential home selling prices is either right or left skewed.
D. H0: The distribution of the residential home selling prices is symmetric.
E. None of the above is correct. 11046 Chapter 01  An Introduction to Business Statistics 39. A real estate company is analyzing the selling prices of residential homes in a given
community. 140 homes that have been solved in the past month are randomly selected and
their selling prices are recorded. The statistician working on the project has stated that in
order to perform various statistical tests, the data must be distributed according to normal
distribution. In order to determine whether the selling prices of homes included in the random
sample are normally distributed, the data is divided into 6 classes of equal size and the
number of observations in each class is recorded. The chisquare goodness of fit test for
normal distribution is performed and the results are summarized in the following table: What are the degrees of freedom for the chisquare test?
A. 2
B. 3
C. 4
D. 5
E. 6 11047 Chapter 01  An Introduction to Business Statistics 40. A real estate company is analyzing the selling prices of residential homes in a given
community. 140 homes that have been solved in the past month are randomly selected and
their selling prices are recorded. The statistician working on the project has stated that in
order to perform various statistical tests, the data must be distributed according to normal
distribution. In order to determine whether the selling prices of homes included in the random
sample are normally distributed, the data is divided into 6 classes of equal size and the
number of observations in each class is recorded. The chisquare goodness of fit test for
normal distribution is performed and the results are summarized in the following table: At a significance level of .05, what is the appropriate rejection point condition?
A. Reject H0 if χ2 > 12.5916
B. Reject H0 if χ2 > 11.0705
C. Reject H0 if χ2 > 9.3484
D. Reject H0 if χ2 > 7.81473
E. Reject H0 if χ2 > 9.48773 11048 Chapter 01  An Introduction to Business Statistics 41. A real estate company is analyzing the selling prices of residential homes in a given
community. 140 homes that have been solved in the past month are randomly selected and
their selling prices are recorded. The statistician working on the project has stated that in
order to perform various statistical tests, the data must be distributed according to normal
distribution. In order to determine whether the selling prices of homes included in the random
sample are normally distributed, the data is divided into 6 classes of equal size and the
number of observations in each class is recorded. The chisquare goodness of fit test for
normal distribution is performed and the results are summarized in the following table: At a significance level of .05, we:
A. Reject H0 and conclude the residential home selling prices are not distributed according to
normal distribution.
B. Failed to reject H0 and conclude the residential home selling prices are not distributed
according to normal distribution.
C. Reject H0 and conclude the residential home selling prices are distributed according to
normal distribution.
D. Failed to reject H0 and conclude the residential home selling prices are distributed
according to normal distribution. 42. In performing a chisquare goodness of fit test for a normal distribution, if there are 7
intervals, then the degrees of freedom for the chisquare statistic is ______________.
A. 7
B. 3
C. 4
D. 6 11049 Chapter 01  An Introduction to Business Statistics 43. The number of degrees of freedom associated with a chisquare test for independence
based upon a contingency table with 4 rows and 3 columns is _____.
A. 7
B. 12
C. 5
D. 6 44. An experiment consists of 400 observations, and four mutually exclusive groups. If the
probability of a randomly selected item being classified into any of the four groups is equal,
then the expected number of items that will be classified into group 1 is _____.
A. 25
B. 100
C. 125
D. 150 45. The chisquare goodness of fit test for multinomial probabilities with 5 categories has
_____ degrees of freedom.
A. 5
B. 4
C. 3
D. 6 46. While a binomial distribution describes a cou...
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 Winter '14

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