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QNT 275 Final Exam 2018 Version (Perfect Answer)
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1. In a game of four-handed Hearts, all 52 cards of a standard deck are dealt, so that each player starts each round with 13 cards in a hand. Suppose player A’s hand has three clubs, six diamonds, two hearts, and two spades. What is the relative frequency of spades, rounded to two decimal places, dealt to player A?
0.25
1.5
0.75
0.15

2. A researcher wants to test if the mean annual salary of all lawyers in a city is different than \$110,000. The null hypothesis for this example will be that the population mean is:
greater than to \$110,000
less than to \$110,000
equal to \$110,000
not equal to \$110,000

3. A quantitative variable is the only type of variable that can:
have no intermediate values
assume numeric values for which arithmetic operations make sense
be graphed
be used to prepare tables

4. Which of the following pairs of events are mutually exclusive?
Female and no
Female and male
Male and yes
Female and yes
5. If you divide the number of elements in a sample with a specific characteristic by the total number of elements in the sample, the dividend is the:
sampling distribution
sample distribution
sample mean
sample proportion
6. For small degrees of freedom, the chi-square distribution is:
rectangular
skewed to the left
symmetric
skewed to the right
7. For a goodness-of-fit test, the frequencies obtained from the performance of an experiment are the:
observed frequencies
objective frequencies
subjective frequencies
expected frequencies

8. In a hypothesis test, a Type I error occurs when:
a false null hypothesis is rejected
a true null hypothesis is rejected
a false null hypothesis is not rejected
a true null hypothesis is not rejected

9. The model y = A + Bx is a:
stochastic model
probabilistic model
nonlinear model
deterministic model

10. To make tests of hypotheses about more than two population means, we use the:
chi-square distribution
t distribution
analysis of variance distribution
normal distribution
11. A linear regression:
gives a relationship between two variables that cannot be described by a line
gives a relationship between two variables that can be described by a line
contains only two variables
gives a relationship between three variables that can be described by a line
12. A continuous random variable x has a right-skewed distribution with a mean of 80 and a standard deviation of 12. The sampling distribution of the sample mean for a sample of 50 elements taken from this population is:
not normal
skewed to the right
approximately normal
skewed to the left
13. Two paired or matched samples would imply that:
two data values are collected from the same source (elements) for two independent samples
data are collected on two variables from the elements of two independent samples
two data values are collected from the same source (elements) for two dependent samples
data are collected on one variable from the elements of two independent samples

14. We can use the analysis of variance procedure to test hypotheses about:
two or more population means
two or more population proportions
the proportion of one population
the mean of one population

15. Two events are independent if the occurrence of one event:
does not affect the probability of the occurrence of the other event.
means that the second event cannot occur.
affects the probability of the occurrence of the other event.
means that the second event is certain to occur.

16. The p-value is the:
smallest significance level at which the null hypothesis can be rejected
largest significance level at which the null hypothesis can be rejected
smallest significance level at which the null hypothesis cannot be rejected
largest significance level at which the alternative hypothesis can be rejected
17. The p-value is the:
smallest significance level at which the null hypothesis can be rejected
largest significance level at which the null hypothesis can be rejected
smallest significance level at which the null hypothesis cannot be rejected
largest significance level at which the alternative hypothesis can be rejected

18. A sample of 16 from a population produced a mean of 86.9 and a standard deviation of 14.3. A sample of 18 from another population produced a mean of 75.4 and a standard deviation of 15.9. Assume that the two populations are normally distributed and the standard deviations of the two populations are equal. The null hypothesis is that the two population means are equal, while the alternative hypothesis is that the mean of the first population is greater than the man of the second population. The significance level is 1%.
What is the critical value of t for the hypothesis test?
2.449
2.733
2.441
2.738

19. In a hypothesis test, a Type II error occurs when:
a true null hypothesis is not rejected
a true null hypothesis is rejected
a false null hypothesis is rejected
a false null hypothesis is not rejected

20. In a survey regarding job satisfaction 574 in a sample of 934 female job-holders stated that they are satisfied with their jobs, while 500 in a sample of 755 male job-holders stated that they are satisfied with their jobs. The null hypothesis is that the proportions of all female and male job-holders who are satisfied with their jobs are the same. The alternative hypothesis is that the proportion of female job-holders who are satisfied with their jobs is lower than the proportion of male job-holders stated who are satisfied with their jobs. The significance level is 2.5%.
What is the critical value of z for the hypothesis test?
-2.33
-1.96
-2.05
-2.17

21. In a one-way ANOVA, we analyze only one:
variable
mean
population
sample
22. A qualitative variable is the only type of variable that:
can assume an uncountable set of values
can assume numerical values
cannot be graphed
cannot be measured numerically

23. For a one-tailed test, the p-value is:
the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis
the area under the curve between the mean and the observed value of the sample statistic
twice the area under the curve to the same side of the value of the sample statistic as is specified in the alternative hypothesis
twice the area under the curve between the mean and the observed value of the sample statistic

24. The alternative hypothesis is a claim about a:
parameter, where the claim is assumed to be true if the null hypothesis is declared false
parameter, where the claim is assumed to be true until it is declared false
statistic, where the claim is assumed to be true if the null hypothesis is declared false
statistic, where the claim is assumed to be false until it is declared true

25. Which of the following assumptions is not required to use ANOVA?
The populations from which the samples are drawn have the same variance.
The samples drawn from different populations are random and independent.
The populations from which the samples are drawn are (approximately) normally distributed.
All samples are of the same size.

26. An error that occurs because of chance is called:
sampling error
nonsampling error
probability error
mean error
27. A researcher wants to test if elementary school children spend less than 30 minutes per day on homework. The alternative hypothesis for this example will be that the population mean is:
not equal to 30 minutes
less than 30 minutes
less than or equal to 30 minutes
equal to 30 minutes
28. The regression model y = A + Bx + e is:
a probabilistic model
a deterministic model
an exact relationship
a nonlinear model

29. The mean of a discrete random variable is the mean of its:
frequency distribution
probability distribution
second and third quartiles
percentage distribution

30. The mean of a discrete random variable is its:
box-and-whisker measure
second quartile
upper hinge
expected value

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• QNT 275 Final Exam 2018 Version (Perfect Answer)
\$24.00

1. In a game of four-handed Hearts, all 52 cards of a standard deck are dealt, so that each player starts each round with 13 cards in a hand. Suppose player A’s hand has three clubs, six diamonds, two hearts, and two spades. What is the relative frequency of spades, rounded to two decimal places, dealt to player A? 0.25 1.5 0.75 0.15 2. A researcher wants to test if the mean annual salar

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