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STATS Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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STATS Exam | Questions And Answers Latest {} A+ Graded | 100% Verified
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STATS Exam | Questions And Answers Latest {2024- 2025} A+ Graded | 100% VerifiedWhat is the position in the distribution corresponds to a z-score of z=-1.00? - Below the mean by a
distance equal to 1 standard deviation
Which of the following z-score values represents the location farthest from the mean? - z=-2.00
For a population with μ=70 and σ=8, what is the z-score corresponding to x=82? - +1.50
z=x-μ/σ
For a population with a standard deviation of σ=10, what is the z-score corresponding to a score that is 5
points below the mean? - z=-0.50
For a population with μ=40 and σ=8, what is the z-score corresponding to x=34? - -0.75
For a population with μ=100 and σ=20, what is the X value corresponding to z=-0.75? - 85
x=μ+zσ
On the exam with μ=52, you have a score of x=44. Which value for the standard deviation would give
you the highest position in the class distribution? - σ=8
A population has μ=50. What value of ó would make X=55 an extreme value out in the tail of the
distribution? - σ=1
z=x-μ/σ
You have a score of X=65 on the exam. Which set of parameters would give you the best grade on the
exam? - μ=60 and σ=5
Under what circumstances is a score that is located 5 points above the mean a central value, relatively
close to the mean? - When the population standard deviation is much greater than 5
, Last week, Sarah had exams in math and in Spanish. On the math exam, the mean was μ=30 with a ó=5,
and Sarah had a score of X=45. On the Spanish exam, the mean was μ=60 with a ó=8, and Sarah had a
score of X=68. For which class should sara expect the better grade - Math
Which of the following is a requirement for a random sample? - Every individual has an equal chance of
being selected.
The probabilities cannot change during a series of selection.
There must be sampling with replacement
A class consists of 10 males and 30 females. If one student is randomly selected from the class, what is
the probability of selecting a male? - 10/40
What is the expected value of M? - It is the mean of the distribution of sample means
What is the standard error of M? - It is the standard deviation of the distribution of sample means
For a population with μ=80 and σ=20, the distribution of sample means based on n=16 will have an
expected value of ___and a standard error of _______ - Expected value of 80 and a standard error of 5
σ/squrt(n)
A sample of n=4 scores is selected from a population with μ=40 and σ=8, and the sample mean is M=43.
What is the standard error for the sample mean? - 4
Z=m-μ/σm
A sample of n=4 scores is selected from a population with μ=40 and σ=8, and the sample mean is M=43.
What is the expected value for the sample mean? - 40
What symbol is used to identify the standard error of M? - σM
Under what circumstances will the distribution of sample means be normal? - If the population is normal
or if the sample size is greater than 30
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