Suppose Lamont's exam score was at the 80th percentile on an exam whose mean was 90 . What was ...

Suppose Lamont's exam score was at the 80th percentile on an exam whose mean was 90 . What was Lamont's exam score?
 a. 76.81
  b. 72.00
  c. 80.00
  d. Cannot tell without more information.

Q. 2

Lamont took a psychology exam whose mean was 70 with standard deviation 5 . He also took a calculus exam whose mean was 80 with standard deviation 10 . He scored 85 on both exams. On which exam did he do better compared to the other students who took the exam?
 a. He did better on the psychology exam, comparatively speaking.
  b. He did better on the calculus exam, comparatively speaking.
  c. He did the same on both exams, relatively speaking.
  d. Cannot tell without more information.

Q. 3

Tanner took a statistics test whose mean was 80 and standard deviation was 5 . The total points possible was 100 . Tanner's score was 2 standard deviations below the mean. What was Tanner's score, rounded to the nearest whole number?
 a. 78
  b. 70
  c. 90
  d. None of these choices.

Q. 4

Stacy took a math test whose mean was 70 and standard deviation was 5 . The total points possible was 100 . Stacey's results were reported to be at the 95th percentile. What was Stacey's actual exam score, rounded to the nearest whole number?
 a. 95
  b. 78
  c. 75
  d. 62

Q. 5

Most values of a standard normal distribution lie between:
 a. 0 and 1
  b. -3 and 3
  c. 0 and 3
  d. minus infinity and plus infinity

Q. 6

In its standardized form, the normal distribution:
 a. has a mean of 0 and a standard deviation of 1.
  b. has a mean of 1 and a variance of 0.
  c. has an area equal to 0.5.
  d. cannot be used to approximate discrete probability distributions.

Q. 7

A larger standard deviation of a normal distribution indicates that the distribution becomes:
 a. narrower and more peaked.
  b. flatter and wider.
  c. more skewed to the right.
  d. more skewed to the left.