Complete the following questions using the data set provided:
(1) (2 points) What is the mean?
a) 13.26
b) 12.36
c) 12.65
d) 18.20
(2) (2 points) What is the median?
a) 12.36
b) 13.26
c) 12.00
d) 6.00
(3) (2 points) What is the mode?
a) 6.00
b) 7.00
c) 12.36
d) 12.00
(4) (2 points) What is the range?
a) 22
b) 23
c) 21
d) 19
(5) (2 points) What is the sample size (n)?
a) 8
b) 9
c) 10
d) 11
(6) (2 points) What is the sample variance?
a) 43.85
b) 48.35
c) 55.25
d) 6.62
(7) (2 points) What is the sample standard deviation?
a) 6.99
b) 6.00
c) 6.62
d) 43.85
(8) (2 points) Using the method of medians, what is value of the 1st
quartile (Q1)?
a) 4.5
b) 6.0
c) 7.5
d) 65.0
Complete the following questions using the data set provided:
(9) (2 points) What is the mean?
a) 9.55
b) 14.00
c) 16.00
d) 13.55
(10) (2 points) What is the median?
a) 11
b) 10
c) 9
d) 8
(11) (2 points) What is the mode?
a) 15
b) 14
c) 9.55
d) 10
(12) (2 points) What is the range?
a) 20
b) 16
c) 15.50
d) 18.25
(13) (2 points) What is the sample size (n)?
a) 12
b) 15.50
c) 11
d) 22
(14) (2 points) What is the sample variance?
a) 54.72
b) 45.27
c) 28.45
d) 25.47
(15) (2 points) What is the sample standard deviation?
a) 5.05
b) 50.5
c) 6.87
d) 3.82
(16) (2 points) Using the method of medians, what is value of the 3rd
quartile (Q3)?
a) 5
b) 18
c) 10
d) 14
Find the standard normal area under the curve for each of the following:
(17) (1 point)
P(–1.22
Z
a) .8730
b) .7830
c) .0500
d) .9500
(18) (1 point)
P(1.22
Z
a) .9255
b) .0725
c) .0885
d) .0918
(19) (1 point)
P(-2.00
Z
a) .1559
b) .1359
c) .8739
d) .8839
(20) (1 point)
P(Z
> 1.96)
a) .0250
b) .9750
c) .9500
d) .0500
(21) (1 point)
P(Z
a) .0500
b) .0250
c) .9950
d) .9773
(22) (1 point)
P(Z
> 2.00)
a) .0250
b) .9750
c) .0228
d) .0500
(23) (1 point)
P(Z
a) .1151
b) .8849
c) .1050
d) .2050
(24) (1 point)
P(Z
a) .0000
b) .4022
c) .5000
d) .6122
25. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with known population standard deviation.
x
= 18,
σ
= 4,
n
= 20, 95 percent confidence
a) (17.247 , 19.753)
b) (15.247 , 19.753)
c) (16.247 , 19.753)
d) (15.266 , 20.753)
26. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with known population standard deviation.
x
= 10,
σ
= 3,
n
= 15, 99 percent confidence
a) (8.005 , 11.995)
b) (9.151 , 10.995)
c) (18.434 , 12.995)
d) (18.233 , 21.995)
27. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with known population standard deviation.
x
= 22,
σ
= 5,
n
= 25, 99 percent confidence
a) (20.464 , 24.297)
b) (19.424 , 24.576)
c) (19.425 , 23.596)
d) (16.259 , 24.622)
28. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with unknown population standard deviation.
x
= 35,
s
= 10,
n
= 16, 95 percent confidence
a) (28.822 , 40.623)
b) (29.671 , 40.329)
c) (29.724 , 41.825)
d) (24.626 , 40.270)
29. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with unknown population standard deviation.
x
= 40,
s
= 8,
n
= 25, 99 percent confidence
a) (35.522 , 43.492)
b) (35.586 , 45.487)
c) (36.597 , 44.208)
d) (35.525 , 44.475)
30. (3 points). Find a confidence interval for
μ
assuming that the sample is from a normal population with unknown population standard deviation.
x
= 50,
s
= 15,
n
= 20, 99 percent confidence
a) (40.404 , 59.596)
b) (41.409 , 59.567)
c) (39.122 , 59.523)
d) (40.401 , 60.600)