Mark the right answer from following multiple-choice questions: (Multiple Choice
ID: 3339009 • Letter: M
Question
Mark the right answer from following multiple-choice questions:
(Multiple Choice Questions)
A standard normal distribution has the mean equal-----and variance=------:
0,1.
1,0.
Either a or b.
None .
10% of college students are left-handed. For a statistics class of 35 students, find the mean number of left-handed students.
3.5
3.15
1.77
None of the above
If the sampling error (E) is allowed to increase, which of the following is true regarding the sample size?
The sample size will increase
The sample size will decrease
The sample size will stay the same
The sample size cannot be determined
If each of a set of raw scores is transformed into a Z-score, the new
distribution will have a standard deviation equal to
zero.
b. one.
c. the mean of the original distribution.
d. the standard deviation of the original distribution.
The t distribution has degrees of freedom.
n
2
10
n – 1
If the z – score of normal distribution is 1.7, the mean of the distribution is 25 and the standard deviation of normal distribution is 3 then the value of X for a normal distribution is
0
47.5
52.5
30.1
Explanation / Answer
A standard normal distribution has the mean equal-----and variance=------:
0,1.
10% of college students are left-handed. For a statistics class of 35 students, find the mean number of left-handed students.
p = 0.1 n = 35
Mean = 0.1 * 35 =
3.5
If the sampling error (E) is allowed to increase, which of the following is true regarding the sample size?
Since sample size is inversely proportional to sampling error,
The sample size will decrease
If each of a set of raw scores is transformed into a Z-score, the new distribution will have a standard deviation equal to
one
The t distribution has degrees of freedom.
n – 1
If the z – score of normal distribution is 1.7, the mean of the distribution is 25 and the standard deviation of normal distribution is 3 then the value of X for a normal distribution is
X = + z
= 25 + 1.7*3 =
30.1
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.