Portage Learning Statistics Module 4 The Z-Test
Questions and Guide Answers
100% Verified Graded A+
1. A frequency distribution that follows a bell-shaped, symmetrical, unimodal
curve is known as the
Answer: normal curve
2. In a normal distribution, the mean is located in the
Answer: middle of the curve
3. In a normal distribution, what is the relationship between the mean, medi- an,
and mode?
Answer: Mean~=Median~=Mode
Mean = Median
4. The further a value deviates from the mean, the the frequency, thus
scores beyond 2 stand deviations from the mean rarely occur in normal
distribution
, Answer: the lower the frequency
5. Data with frequencies are clustered around the mean
Answer: the greatest
6. A distribution with a smaller standard deviation has a curve with a
Answer: higher arc
7. A distribution with a larger standard deviation has a curve with a
Answer: lower arc
8. A normal distribution can be defined by its
Answer: mean and standard deviation
9. The area under the curve represents the total relative frequency of a distri-
bution and equals
Answer: 100%
10. In a normal curve, an equal number of distributions fall
Answer: above and below the mean
11. Normal distributions are approximated with the rule
Answer: 68-95-99.7
12. About values fall within 1 SD of the mean
About values fall within 2 SD of the mean
About values fall within 3 SD of the mean
Questions and Guide Answers
100% Verified Graded A+
1. A frequency distribution that follows a bell-shaped, symmetrical, unimodal
curve is known as the
Answer: normal curve
2. In a normal distribution, the mean is located in the
Answer: middle of the curve
3. In a normal distribution, what is the relationship between the mean, medi- an,
and mode?
Answer: Mean~=Median~=Mode
Mean = Median
4. The further a value deviates from the mean, the the frequency, thus
scores beyond 2 stand deviations from the mean rarely occur in normal
distribution
, Answer: the lower the frequency
5. Data with frequencies are clustered around the mean
Answer: the greatest
6. A distribution with a smaller standard deviation has a curve with a
Answer: higher arc
7. A distribution with a larger standard deviation has a curve with a
Answer: lower arc
8. A normal distribution can be defined by its
Answer: mean and standard deviation
9. The area under the curve represents the total relative frequency of a distri-
bution and equals
Answer: 100%
10. In a normal curve, an equal number of distributions fall
Answer: above and below the mean
11. Normal distributions are approximated with the rule
Answer: 68-95-99.7
12. About values fall within 1 SD of the mean
About values fall within 2 SD of the mean
About values fall within 3 SD of the mean
