Stats test 2
for a population with M=80 and O=6, what is the z-score corresponding with X=68?
-2.00
A population has SS=100 and 02=4. What is the value of E(X-M) for the population?
0
For any distribution, what is the z-score corresponding to the mean?
0
a sample of n= 20 scores is transformed into z-scores. What is the mean for the set of 20 z-scores?
0
if an entire population with M=60 and O=8 is transformed into z-scores, then the distribution of z-scores will have a mean of ___ and a standard deviation of ____.
0;1
A population of N=100 scores has M=30 and O=4. What is the population variance?
16
A population has SS= 100 and o2=4. How many scores are in this population?
25
what is the value of SS for the following sample? Sample: 1,1,1,7
27
A population of scores has M=80. In this population, a score of X=86 corresponds to Z= +2.00. What is the population standard deviation?
3
in a population with a standard deviation of O=5, a score of X=44 corresponds to a z score of z=2.00. what is the population mean?
34
a sample of n=5 scores has EX=20 and EX2= 120. For this sample, what is the value of SS?
40
A sample of n=8 scores has SS=50. if these same scores were a population, then the SS value for the population would be ____.
50
What position in the distribution corresponds to a z-score of z = -1.00?
Below the mean by a distance equal to 1 standard deviation.
A population has M=50 and O=5. if 10 points are added to every score in the population, what are the new values for the mean and standard deviation?
M=60 and O=5
for a sample with s= 12, a score of X= 73 corresponds to z= -1.00. What is the sample mean?
M=85
A sample of n=9 scores has a variance of s2=18. if the scores were a population, what value would be obtained for the population variance.
O2=16
A population has M=50. What value of O would make X=55 an extreme value out in the tail of the distribution?
O=1
on an exam with a mean of M=70 , you have a score of X= 65. which of the following values for the standard deviation would give you the highest position in the class?
O=10
on an exam with M= 52, you have a score of X=44. Which value for the Standard deviation would give you the highest position in the class distribution?
O=8
What are the values for SS and variance for the following smaple of N=3 scores? Sample 1,4,7.
SS= 18 and variance= 9
For the following scores, which of the following actions will increase the range? Scores: 3,7,10,15
Subtract 3 points from the score X=3.
Which of the following actions will have no effect on the value of the standard deviation?
Subtract 5 points from every score in the distribution
which of the following is a consequence of increasing variability?
The distance from one score to another tends to increase, and a single score tends to provide a less accurate representation of the entire distribution.
under what circumstances is a score that is 15 points above the mean an extreme score relatively far from the mean?
When the population standard deviation is much smaller than 15
which of the following z-score values represents the location farthest from the mean?
Z= -2.00
Which of the following symbols identifies the population standard deviation?
o symbol thing
Which of the following symbols identifies the sample variance?
s2
A set of 10 scores has SS=90. if the scores are a sample the sample variance is ____. and if the scores are a population, the population variance is ____.
s2=10 O2=9
A sample has M= 72 and s=4. in this sample, what is the X value corresponding to z = -2.00?
x=64
for a population with a standard deviation of O=6, what is the z-score corresponding to a score that is 12 points above the mean?
z=2
What is the value of SS for the following population? Population 1, 1, 1, 5
12