In 2002 the price of a pound of ground beef was $1.25. By 2008, the price
had increased of $1.60. The price relative is
2.85
10.85
35
78.125
128
None of these answers is correct.
In a multiple regression analysis involving 15 independent variables and
200 observations, SST = 800 and SSE = 240. The coefficient of
determination is
0.300
0.192
0.500
0.700
0.808
None of these answers is correct.
34.23
35.43
39.63
42.81
44.11
None of these answers is correct.
(Continuing the above problem) The mean square within treatments
(MSE) is
18.89
20.23
22.33
24.67
30.67
None of these answers is correct.
In the past, 35% of the students at NCHU University were in the
Management College, 35% of the students were in the Liberal Arts College,
and 30% of the students were in the Education College. To see whether or
not the proportions have changed, a sample of 300 students was taken.
Ninety of the sample students are in the Management College, 120 are in
the Liberal Arts College, and 90 are in the Education College. The expected
frequency for the Management College is
0.3
0.35
90
100
115
None of these answers is correct.
(Continuing the above problem) The calculated value for the test statistic
equals
0.01
0.75
4.29
4.38
4.75
None of these answers is correct.
The time in minutes for which a student uses a computer terminal at the
Computer center of a major university follows an exponential probability
distribution with a mean of 36 minutes. Assume a student arrives at the
terminal just as another student is begging to work on the terminal. What
is the probability that the wait for the second student will be 15 minutes or
less?
0.3408
0.2706
0.4889
0.1113
0.5538
None of these answers is correct.
In the two upcoming basketball games, the probability that UTC will
defeat Marshall is 0.63, and the probability that UTC will defeat Furman
is 0.55. The probability that UTC will defeat both opponents is 0.3465.
What is the probability that UTC will defeat Furman given that they
defeat Marshall?
0.55
0.71
0.31
0.36
0.37
None of these answers is correct.
What value of Durbin-Watson statistic indicates no autocorrelation is
present?
–2
–1
0
1
2
None of these answers is correct.
0.4132
1.96
2.42
1.645
4.312
None of these answers is correct.
(Continuing the above problem) The p-value is approximately
0.01
0.0125
0.025
0.05
0.075
None of these answers is correct.
4.0
7.46
4.24
2.0
3.0
None of these answers is correct.
(Continuing the above problem) At 95% confidence, the margin of error is
1.96
1.645
3.920
2.000
1.280
None of these answers is correct.
A student believes that the average grade on the statistics final
examination is 87. A sample of 36 final examinations is taken. The average
grade in the sample is 83.96 with a standard deviation of 12. Using a
critical value, test the hypothesis at the 5% level of significance.
–1.91
–1.52
0
1.52
1.91
None of these answers is correct.
(Continuing the above problem) Compute the probability of a Type II error
if the average grade on the final is 85.
0.6654
0.7654
0.8654
0.9654
0.5
None of these answers is correct.
(Continuing the above problem) The population standard deviation is 10.
How large a sample should be taken if the researcher is willing to accept a
0.1 probability of marking a Type II error when the actual population
mean is 88?
1000
1009
1119
1200
1300
None of these answers is correct.
A random sample of 81 children with working mothers showed that they
were absent from school an average of 6 days per term with a standard
deviation of 1.8 days. Provide a 92.5% confidence interval for the average
number of days absent per term for all the children.
5.644 to 6.356
4.546 to 6.356
5.644 to 7.665
4.546 to 7.665
–1 to 1
None of these answers is correct.
The average weekly earnings of bus drivers in a city are $950 (that is μ )
with a standard deviation of $45 (that is σ ). Assume that we select a
random sample of 81 bus drivers. What is the probability that the sample
mean will be greater than $960?
0.0228
0.0398
0.0489
0.598
0.0377
None of these answers is correct.
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