QNT/275 Final
December 2020
If you can figure out which of the four questions are wrong, then you can get 100%
The regression model y = A + Bx + e is:
• a nonlinear model
• a deterministic model
• a probabilistic model
• an exact relationship
The mean of a discrete random variab...
If you can figure out which of the four questions are wrong, then you can get 100%
The regression model y = A + Bx + e is:
a nonlinear model
a deterministic model
a probabilistic model
an exact relationship
The mean of a discrete random variable is the mean of its:
frequency distribution
percentage distribution
probability distribution
second and third quartiles
The p-value is the:
smallest significance level at which the null hypothesis cannot be rejected
largest significance level at which the alternative hypothesis can be rejected
largest significance level at which the null hypothesis can be rejected
smallest significance level at which the null hypothesis can be rejected
A quantitative variable is the only type of variable that can:
be graphed
have no intermediate values
assume numeric values for which arithmetic operations make sense
be used to prepare tables
To make tests hypotheses about more than two population means, we use the:
analysis of variance distribution
normal distribution
t distribution
chi-square distribution
, 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?
-2.05
-1.96
-2.33
-2.17
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 hears,
and two spades. What is the relative frequency of spades, rounded to two decimal places, dealt to
player A?
0.75
0.15
1.5
0.25
Two events are independent if the occurrence of one event:
Means that the second event is certain to occur.
Does not affect the probability of the occurrence of the other event.
Affects the probability of the occurrence of the other event.
Means that the second event cannot occur.
The model y = A + Bx is a:
Deterministic model
Nonlinear model
Probabilistic model
Stochastic model
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