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Z-scores
Page 3
Questions (190)
Assuming that the data are normally distributed with a mean of 45 and a standard deviation of 3.25, what is the z-score for a
2 answers
asked by
Anonymous
1,012 views
How do you find the z score of a percentile?
For ex.: Find the z score of P88
2 answers
asked by
Anonymous
983 views
1. Consider a population with µ=73.6 and 0 = 5.38
(A) Calculate the z-score for x =72.7 from a sample of size 45. (B) Could this
2 answers
asked by
jane
942 views
i need help: A national achievement test is administered annually to 9th graders. The test has a mean score of 100 and a
3 answers
asked by
mufasa
956 views
Suppose you did a survey of male shoes size and the mean of that survey was size 10 with a standard deviation of 1.5. What is
2 answers
asked by
Wyeth
926 views
A sample of 148 of our statistics students rated their level of admiration for Hillary Rodham Clinton on a scale of 1 to 7. The
2 answers
asked by
eid2013
917 views
4. Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of
2 answers
asked by
Sandra
934 views
Weights of the vegetables in a field are normally distributed. From a sample Carl Cornfield determines the mean weight of a box
1 answer
asked by
sarah
926 views
For the data in question 13, find the raw scores that correspond to the following:
(a) z 5 11.22; (b) z 5 20.48.
3 answers
asked by
jj
886 views
Suppose the temperature of a cup of coffee is normally distributed with a mean of 142 degress F. If a cup of coffee has a z
3 answers
asked by
PLZ HELP
793 views
Darned old Foofy!
Foofy computes the x̅ (MEAN) from data that her professor says is a random sample from population Q. she
1 answer
asked by
Mari
766 views
given a mean of 8 and a standard deviation of 0.7 what is the z-score of the value 9 rounded to the nearest tenth
2 answers
asked by
Miranda
762 views
The class average on a math test was 75.5 and the standard deviation was 4.2. Find the z-score for a test score of 81
2 answers
asked by
Samantha
718 views
Find the z-score for which the area to its left is 0.46 .
Write only a number as your answer. Round to two decimal places (for
2 answers
asked by
Obi
696 views
Find the z-score for which the area to its right is 0.65 .
Write only a number as your answer. Round to two decimal places (for
2 answers
asked by
Obi
709 views
Find the z-scores that bound the middle 55% of the standard normal distribution
____ small value _____ larger value
1 answer
asked by
Teresa
665 views
can someone please help me understand how to get a z score. For example I have to find the z score for: x and y and x is 2 and y
2 answers
asked by
patinace
627 views
Use the z-table to find the requested probabilities. Enter your answers to 4 decimal places.
(a) P(z < −1.02) = Incorrect: Your
2 answers
asked by
Sara
614 views
An 8th grade history teached studied the statistics for her mid-term exam. The average grade for the mid-term was 84 points, and
2 answers
asked by
Jodi
638 views
Calculate the z-score for each set of data. Determine who did better on her respective test, Tonya or Lisa.
Student English Test
3 answers
asked by
Anonymous
618 views
Our statistics students, as noted in Exercise 6.32, were asked to rate their admiration of Hillary Rodham Clinton
on a scale of 1
1 answer
asked by
eid2013
594 views
In the average ball game, the sum of the scores of both teams is 4545, with a standard deviation of 55. If the score of a
1 answer
asked by
Peewee
665 views
4 Find:
a. The z score for each male salary, based on only the male salaries. b. The z score for each female salary, based on
2 answers
asked by
Anonymous
600 views
Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park
2 answers
asked by
Ginger
613 views
2. The results of a recent survey indicate that the average new car costs $23,000, with a standard deviation of $3,500. The
2 answers
asked by
Anonymous
589 views
The scores on a mathematics test have a mean of 72 and a standard deviation of 5. Find the test score that corresponds to a
2 answers
asked by
john
565 views
The mean of a normally distributed data set is 226.2. The data item, 230, has a z-score of 0.2. Find the standard deviation.
3 answers
asked by
Anonymous
560 views
A random sample of n = 9 scores is obtained from a population with ì = 50 and ó = 9. If the sample mean is M = 59, what is the
3 answers
asked by
Anonymous
567 views
a research participant has her brain scanned while listening to music and solving math problems, and the brain area of interest
2 answers
asked by
Anonymous
562 views
The class average on a math quiz was 74 and the standard deviation was 6.8.
Find the z-score for a test score of 82.
2 answers
asked by
Sally
565 views
If I don't know the mean and the standard deviation how can I find the area of z-score -0.75
2 answers
asked by
LaToya
536 views
The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was
3 answers
asked by
Marty
556 views
find the z-scorerelated to the raw score,mean,and standard deviation. Assume a normal probability distribution Raw score=
2 answers
asked by
Mary
521 views
Suppose X~N(22.8, 2.15) and P(x > 20)=.87
What is the z score
1 answer
asked anonymously
14 views
What is the Z-value for Z0.0150
1 answer
asked anonymously
17 views
If X~N(7,2)
What is the z score for x=2
1 answer
asked anonymously
13 views
Consider a population with and .
(A) Calculate the z-score for from a sample of size 13. (B) Could this z-score be used in
2 answers
asked by
deandra
510 views
If μ = 500 and σ =10, z = -3.0 falls how many points below the mean?
1 answer
asked by
tom
469 views
Score on dental anxiety scale range from 0 ( no anxi) to 20 ( extreme anxiety). The scores are normally distributed with a mean
2 answers
asked by
Sam
490 views
Henry's z-score on his reading test was 1.27. The class average was 60, the median was 58.5 and the variance was 6.2. What was
2 answers
asked by
Lauren
480 views
a math test has a mean of 43 and a standard deviation of 17.0. find the corresponding z scores for a test score of 13 and a test
2 answers
asked by
mary
472 views
kris scored 630 points on a particular section of a CPA exam for which the score were normally distributed with a mean of 600
2 answers
asked by
shirley
484 views
Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution.
Raw score =
2 answers
asked by
JEN
475 views
Give three reasons why z scores are useful.
1 answer
asked by
eid2013
458 views
Given the following information about a sample, calculate a z score for a test grade of 91.
= 87, s = 4.01
1 answer
asked by
siobhan
470 views
The mean score for all individuals who took the Law School Admission Test (LSAT) in 2010 was 155 and the standard deviation was
1 answer
asked by
Stacey
474 views
Find the z-score for the given raw score, mean, and standard deviation. Assume a normal probability distribution.
Raw score = 15,
1 answer
asked by
katie
469 views
kris scored 630 points on a particular section of a CPA exam for which the score were normally distributed with a mean of 600
1 answer
asked by
kaleb
472 views
Five friends go bowling and finish with the following scores. Jim bowls a 129, Bob bowls a 150, Ann bowls a 133, Tom bowls a 162
3 answers
asked by
John
482 views
Can someone explain how I missed this question.
Sample has a mean of 47 and a standard deviation of 9. Find the z-score for each
1 answer
asked by
Sue
472 views
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Parent Categories (14)
Data Analysis
Descriptive Statistics
Hypothesis Testing
Inferential Statistics
Measures of Central Tendency
Measures of Central Tendency and Dispersion
Normal Distribution
Population distribution
Probability
Probability and Statistics
Sampling
Scores and Measures
Statistical Analysis
Statistics