Question

For items 1-5 (2 pts each), use the following scores to calculate the descriptive statistics below: 2, 4, 6, 8, 8, 8

1. Mean = 4. Standard deviation =

2. Mode = 5. Degrees of Freedom =

3. Median =

For items 6-7, use the data from a standardized test (m = 75, s = 10) that measures superhuman power. In addition to calculations, be sure to complete the distribution below by labeling z scores, mean, and standard deviation (1 pt) AND drawing in where each individual’s score fall

Spiderman has a score of 78. What is his z score and percentile rank? Where does Spiderman fall in the distribution? (5 pts total)

z score = percentile rank =

8. Superman is at the 95th percentile. What is his z score and raw score? Where does Superman fall in the distribution? (5 pts total)

z score = raw score =

Answer #1

***Just need question c answered ***
1. Use the following raw data to answer parts a and b of this
question:
Xi: 3, 7, 14, 6, 17, 8, 10, 5
a. Calculate the mean, standard deviation, and variance for the
above set of scores. Assume that the eight scores represent an
entire population, and further assume that the scores are normally
distributed.
b. Calculate the Z-score associated with each raw score.
c. Find the percentile scores which correspond to percentile...

1. A criminologist developed a test to measure recidivism, where
low scores indicated a lower probability of repeating an
undesirable behavior. The test is normed so that it has a mean of
140 and a standard deviation of 40.
a. What is the percentile rank of a score of 172?
b. What is the Z score for a test score of 200?
c. What percentage of scores fall between 100 and 160?
d. What proportion of respondents should score above...

Descriptive analysis revealed that the mean Test 1 score of all
statistics students was 71.23, with a standard deviation of 19.04.
Furthermore, assume that the distribution of all students' Test 3
scores is normally distributed.
Determine the z-score that corresponds to Test 3 score of 83. Round
the solution to two decimal places.
z=
Determine the following probabilities. Round all probability
solutions to four decimal places.
Determine the probability that a randomly selected student scored
exactly a 59 on Test...

You will be asked to calculate either raw scores or percentages.
For each question write out your calculation, the appropriate Z
score, what on the curve you should be shading, the exact
percentage from the normal curve table and the final answer.
A group of students take a Statistics quiz where the average was
M = 90 and the standard deviation was SD = 7.8. Answer the
following questions regarding this distribution using your normal
curve table. Depending on the...

(3 pts) For students in a certain region, scores of students on
a standardized test approximately follow a normal distribution with
mean μ=543.4 and standard deviation σ=30. In completing the parts
below, you should use the normal curve area table that is included
in your formula packet.
(a) What is the probability that a single randomly selected
student from among all those in region who took the exam will have
a score of 548 or higher?
ANSWER:
For parts (b)...

Answer the following questions about the dataset below and SHOW
YOUR WORK.
Dataset: Exam 2 scores of MKT2300 class are given below
80, 52, 69, 78, 34, 67, 99, 76, 67, 56, 68, 78, 77, 79
What’s the mean?
What’s the median?
What’s the mode?
What’s the variance?
What’s the standard deviation?
What’s the range?
If Jake took a makeup exam and got a 84.8 from this exam, what
is his z score? (use the mean and the standard deviation...

Use the following data to answer problems A-D.
Subject
M
s
Chemistry
70
12
Math
28
7
A. John scores 26 in a math test and 60 in a chemistry test.
Which test did John perform better on, compared to others in the
class? Explain why. (10 pts)
B. Betty scored 1.5 standard scores above the mean for each
test. What were her raw scores for each test? (10 pts)
C.Oscar scored 73 on his chemistry test. What is his...

1.
One hundred percent of scores fall under the area of the normal
curve.
true
false
2. A z score tells nothing about the distance of a score from
the mean.
true
false
3. A z score does NOT allow for the comparison of different
scores from different distributions
true
false
4. A number whose z score is equal to zero is equal to the
mean.
true
false
5. Which of the following is not a characteristic of the
normal...

2.
In the following questions, assume you have a normal
distribution.
The average score on a mathematics test is 36. The standard
deviation is 4.
What percentage can be expected to score between 33 and
35?
3. In the following questions, assume you have
a normal distribution.
The average score on a mathematics test is 36. The standard
deviation is 4.
What score falls at the 50th percentile?
4. Given, an IQ test with:
u= 100
o= 16
What percent...

0. Consider a distribution of raw scores in which the
distribution is normal. Consider that each and every score is
converted into a standard score (a z score), such that the
resulting distribution is a normal distribution of standard scores
(a standard normal distribution, also known as the SND). The
standard normal distribution has all the following characteristics,
except
a. The distribution is bell-shaped.
b. The distribution is symmetrical.
c. The mean, median, and mode of the distribution are equal...

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