Transcript Quiz Chapter Six Categorical Data

Quantitative Methods PSY302
Quiz Chapter Six
Confidence Intervals
1. We can’t assume that the sample mean will
equal the population mean because of _____.
(104)
A.
B.
C.
D.
E.
skewness
outliers in the data
sampling error
confirmation bias
anhedonia
1. We can’t assume that the sample mean will
equal the population mean because of _____.
(104)
A.
B.
C.
D.
E.
skewness
outliers in the data
sampling error
confirmation bias
anhedonia
2. What is a confidence interval for the mean? It is
a(n) _________within which the true mean of the
population is believed to exist. (105)
A.
B.
C.
D.
E.
standard deviation
non random sample
research design or meta-analysis
frequency distribution
range of values
2. What is a confidence interval for the mean? It is
a(n) _________within which the true mean of the
population is believed to exist. (105)
A.
B.
C.
D.
E.
standard deviation
non random sample
research design or meta-analysis
frequency distribution
range of values
3. A ____ is a point along the baseline of the
normal curve that is expressed in standard
deviation units. (107)
A.
B.
C.
D.
E.
distribution of critical values
Z value
confidence interval
categorical variable
sum of squares
3. A ____ is a point along the baseline of the
normal curve that is expressed in standard
deviation units. (107)
A.
B.
C.
D.
E.
distribution of critical values
Z value
confidence interval
categorical variable
sum of squares
4. To calculate a confidence interval we need
to:(106)
A.
B.
C.
D.
E.
add something to the mean
subtract something from the mean
know the true value of the parameter
a&b
all of the above
4. To calculate a confidence interval we need
to:(106)
A.
B.
C.
D.
E.
add something to the mean
subtract something from the mean
know the true value of the parameter
a&b
all of the above
5. In a distribution with a mean of 40 and a
standard deviation of 5 what values would
encompass approximately 95% of the scores?
A.
B.
C.
D.
E.
35-45
30-50
25-55
40-95
all of the above
5. In a distribution with a mean of 40 and a
standard deviation of 5 what values would
encompass approximately 95% of the scores?
A.
B.
C.
D.
E.
35-45
30-50
25-55
40-95
all of the above
6. We use the symbol ____ to represent the
sample size. (111)
A.
B.
C.
D.
E.
μ
b
σ
n
s
6. We use the symbol ____ to represent the
sample size. (111)
A.
B.
C.
D.
E.
μ
b
σ
n
s
7. As n increases the standard error: (111)
A.
B.
C.
D.
E.
remains the same
increases
decreases
doubles
turns to zero
7. As n increases the standard error: (111)
A.
B.
C.
D.
E.
remains the same
increases
decreases
doubles
turns to zero
8. When you divided the standard deviation of the
population by the square root of n (the sample
size) you have the:
A.
B.
C.
D.
E.
standard error
mean
correlation coefficient
confidence interval
sum of squares
8. When you divided the standard deviation of the
population by the square root of n (the sample
size) you have the:
A.
B.
C.
D.
E.
standard error
mean
correlation coefficient
confidence interval
sum of squares
9. A 95% confidence interval is constructed so that
it will capture the true mean of the population:
(115)
A.
B.
C.
D.
E.
never
always
99% of the time
95% of the time
On president’s day
9. A 95% confidence interval is constructed so that
it will capture the true mean of the population:
(115)
A.
B.
C.
D.
E.
never
always
99% of the time
95% of the time
On president’s day
10. When calculating a confidence interval and the
standard deviation of the population is unknown
you have to:
A. guess
B. calculate the sum of squares
C. estimate the value of the population standard
deviation.
D. sacrifice a gray squirrel to the gods
E. change your data to categorical variables and
use chi square
10. When calculating a confidence interval and the
standard deviation of the population is unknown
you have to:
A. guess
B. calculate the sum of squares
C. estimate the value of the population standard
deviation.
D. sacrifice a gray squirrel to the gods
E. change your data to categorical variables and
use chi square
The End
A.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
c
c
b
d
b
d
c
a
d
c