Question

You scored an 89 on a math test where the class mean and
standard deviation are 75 points and 7 points respectively. You
scored a 65 on an English test where the mean and standard
deviation are 53 points and 4 points, respectively.

In which class did you do better? Explain your answer using
Z-scores.

Answer #1

hit like please.

In Test-1 of Math-120 you scored 85, where the mean score of the
class is 70 and standard deviation = 5. On Math-150 Test-1 you
scored 88, where the mean score on that class is 76 and standard
deviation = 6. You did comparatively better on which test, Math-120
or Math-150? Show and explain your reasoning with the help of
z-score.

In Test-1 of Math-120 you scored 85, where the mean score of the
class is 70 and standard deviation = 5. On Math-150 Test-1 you
scored 88, where the mean score on that class is 76 and standard
deviation = 6. You did comparatively better on which test, Math-120
or Math-150? Show and explain your reasoning with the help of
z-score.

Test Scores A students scored 76 on a general science test where
the class mean and standard deviation were 82 and 8 respectively;
he also scored 53 on a psychology test where the class mean and
standard deviation were 58 and 3 respectively. In which class was
his relative position higher? I need solution step by step.

Suppose that SAT math scores are normally distributed with a
mean of 516 and a standard deviation of 115, while ACT math scores
have a normal distribution with a mean of 22 and a standard
deviation of 5. James scored 650 on the SAT math and Jacob scored
29 on the ACT math. Who did better in terms of the standardized
z-score?
Group of answer choices
James
Jacob
They did relatively the same.
Impossible to tell because of the scaling

Suppose the grade on a Math test is normally distributed with
mean 78 and standard deviation 10. (a) Compute the z-scores (5
points) (a-1) If Bob got 70 on the test, what is his z-score? (a-2)
If Jane got 90 on the test, what is her z-score? (b) Compute the
actual grades (5 points) (b-1) Suppose David achieved a grade 1.8
standard deviation above the mean (? = 1.8), what was his actual
grade? (b-2) Suppose Lily achieved a grade...

Suppose the grade on a Math test is normally distributed with
mean 78 and standard deviation 10. (a) Compute the z-scores (5
points) (a-1) If Bob got 70 on the test, what is his z-score? (a-2)
If Jane got 90 on the test, what is her z-score? (b) Compute the
actual grades (5 points) (b-1) Suppose David achieved a grade 1.8
standard deviation above the mean (? = 1.8), what was his actual
grade? (b-2) Suppose Lily achieved a grade...

Math part of SAT test scores has mean μ=500 and standard
deviation σ=100. ACT test scores have mean μ=18 and standard
deviation σ=6. Eleanor scored 680 on her SAT math test, Frodo
received score of 27 on his ACT test.
Assuming that both tests measured the same ability, who has a
better score.

In your psychology class, the mean exam score is 72 and
the standard deviation is 12. You scored 78.
In your biology class, the mean exam score is 56 and the
standard deviation is 5. You scored 66.
If your professors grade "on a curve" (i.e., according
to the distribution of scores), for which exam would you expect to
get a better grade?
(Hint: Convert your exam scores to
z-scores).
A) Biology
B) Psychology

Suppose the grade on a Math test is normally distributed with
mean 78 and standard deviation 10.
(c) Rob achieved a grade that exceeded 95% of all grades. Find
Rob’s actual grade.
(d) Suppose 32% of students did better than Mei. Find Mei’s
actual grade.
Please explain the z=score/z=table process

Suppose the grade on a Math test is normally distributed with
mean 78 and standard deviation 10.
(c) Rob achieved a grade that exceeded 95% of all grades. Find
Rob’s actual grade.
(d) Suppose 32% of students did better than Mei. Find Mei’s
actual grade.
Please explain why z=-1.65 for C and why z=.47 for D

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