Tags
Tag: Z-Score
Pages
The following pages have the tag
Z-Score associated with them. The number of users that have also tagged the page ' Z-Score ' is in parenthesis.
How Do You Calculate a Z-Score/ Sigma Level? ( 53 )
The basics of z-scores are discussed plus an example of raw usability data converted into z-scores including three of Nielsen's five usability attributes.
Z-Score to Percentile Calculator ( 38 )
Look up the area under the normal curve (1 or two-sided areas) from a standard score (Z-score).
What's a Z-Score and Why Use it in Usability Testing? ( 18 )
This common statistical way of describing data can be used in usability testing to standardize disparate data types to allow easy comparison between products or versions and providing a universal way of assessing quality.
Interactive Graph of the Standard Normal Curve ( 14 )
Use this interactive normal curve to understand how the z-score and the area of the curve are related. Offers both one and two-sided options.
Percentile to Z-Score Calculator ( 10 )
Enter the area under the normal curve (a proportion between 0 & 1) and get the Z-critical value.
Questions
The following questions have the tag
Z-Score associated with them. The number of users that have also tagged the question ' Z-Score ' is in parenthesis.
How do you know when to use a t-score instead of a z-score and vice versa?. . . ( 1 )
Olympic Track related question: You know the last 5 race times at the same distance for 8 runners c. . . ( 1 )
How do you calculate a participant score if she was at the 67th percentile? I only have the standard. . . ( 1 )
Each student in an experiment was told to look at 100 cars and count the number of people wearing th. . . ( 1 )
the lengths of human pregnancies are normally distributed with a mean of 268 days and a standard dev. . . ( 1 )
In one region, the September energy consumption levels for single-family homes are found to be norma. . . ( 1 )
Could you detail the value of using standard scores (Z scores) to compare relative performance of in. . . ( 1 )
What is the height of a man with the z score of -1.7?. . . ( 1 )
A woman wrote to DearAbby and claimed that she gave birth 308 days after a visit from her husband, w. . . ( 1 )
mean score 100,standard deviation 20, z score-5 , what is the raw score?. . . ( 2 )
How do you find the normal distribution when the mean is 50 witha standard deviation between scores . . . ( 2 )
How do you dertermine a z-score for continuous data?. . . ( 2 )
Given that the traveling distance for a population of college students is normally distributed with . . . ( 4 )
If I know the T-score for those who made an A on a test is 60, the z-score for those that made a B i. . . ( 2 )
1 a. with a mean of 300 and a standard deviation of 80, how high a score do you need to be in the to. . . ( 2 )
We have administered an anxiety test to all members of the class. The mean anxiety score is 71 and t. . . ( 2 )
The accounting department at Weston reports that it takes two construction workers a mean of 32 hou. . . ( 2 )
find the area under standard normal curve which lies (a) to the right of Z=1.76,(b)to the left of Z=. . . ( 2 )
In the same set of data,can two or more elements have the same z score.. . . ( 2 )
The mean weight of 500 students is 151 lbs and the standard deviation is 15 lbs. Assuming the weigh. . . ( 2 )
A bank has determined that the monthly balances of savings accounts of its customers are normaly dis. . . ( 2 )
A random variable X is normal distributed with a mean of 250 and standard deviation of 50. Given tha. . . ( 3 )
find the z value so that 20% of the standard normal curve lies to the right of Z. . . ( 2 )
A woman sells an average of 300 books per month, with a standard deviation of 50. Over the next ten . . . ( 2 )
A traffic study at one point on an interstate highway shows that vehicle speeds are normally distrib. . . ( 2 )
random variable x is normally distributed with mean of 250 and standard deviation of 50 find z-score. . . ( 2 )
How can I calculate a Z score with only the mean and the standard deviation?. . . ( 3 )
A test is normally distributed with a mean of 40 and a standard deviation of 7. (a) What score would. . . ( 2 )
How can you use a Z score to interpret data in a school. . . ( 2 )
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining . . . ( 2 )
A standard I.Q. test produces normally distributed results with a mean of 100 and a standard deviati. . . ( 2 )
The lengths of pregnancies are normally distributed with a mean of 264 days and a standard deviation. . . ( 2 )
If an A is given to a student who scores 90% or above, what would the minimum z-score be for a 300 m. . . ( 2 )
The lowest 25% of the normal distribution falls below what z-score and t-score. . . ( 2 )
A classical experiment in extrasensory perception (ESP) consists of asking a subject to tell, withou. . . ( 2 )
with a mean of 150 and a standard deviation of 15 what is the probability of a student having a weig. . . ( 2 )
What are the 2 advantages of using Z power?
If the z score is less than 0, what can be said of the . . . ( 2 )
A nationally standardized test is scaled so that the normally distributed scores have a mean of 80 a. . . ( 2 )
Jeff:
Can you possibly share the actual formula you are using in this application to produce the . . . ( 2 )
I have a data set where n=20. My problem is to find the score at exactly the 75th percentile assumi. . . ( 3 )
Between what two values of Z will 88% of the middle data values fall between?. . . ( 3 )
If a distribution of test scores is normal with a mean of 78 and a standard deviation of 11, what pe. . . ( 4 )
a score that is 8 points above the mean corresponds to a z-score=0.05 What is the population standa. . . ( 3 )
A z score of 1.04 shows a percentage value of?. . . ( 5 )
My local coffee house sells Colombian coffee beans to supermarkets in bags labelled 100g each.
Th. . . ( 4 )
Suppose that the scores of architects on a particular creativity test are normally distributed.What . . . ( 4 )
The variable Z has a standard Normal distribution.
a) Find the number z that has cumulative propor. . . ( 4 )
Find the number z that has cumulative proportion 0.8. . . ( 4 )
What does a z value mean?. . . ( 4 )
Site preparation for new housing developments for tracts of 40 houses is normally distributed with a. . . ( 4 )
how does altman build z-score? please send to my email the process of building this score!. . . ( 5 )
Find the probability that a randomly selected adult has an IQ that is less than 130. . . ( 4 )
In a 0ne-tail test (l side) with z score of 1.645, what are the percentages for critical value and n. . . ( 4 )
why can you not have a z- score equaling 0/0 ? what is problematic with calcutlating a z-score for . . . ( 4 )
If last six month average defect rate is 5% then what will be the process Zst score?
. . . ( 4 )
z Scores lenths are measured in centameters, does it have to be converted to a different unit of mea. . . ( 4 )
With a z score of 1.5, what percentage often scores are above 52 and what percentage of the scores a. . . ( 3 )
what is the z-score that corresponds to the 20th percentile of the normal distribution. . . ( 4 )
What score would Sandra need to beat 91 percent of her mathematics class? The mean score was 73, and. . . ( 6 )
I am conducting a ring test where 6 laboratories were asked to measure protein levels in the same fl. . . ( 4 )
what is the value of z score required for a 70% confidence interval?. . . ( 4 )
The mean on this test is 3.5 with a standard deviation of .5. Billy scores 5. What is the standard. . . ( 3 )
The grades on the midterm given in a large managerial stats class are normally distibuted with mean . . . ( 2 )
What are the units of z-score?. . . ( 4 )
On a scale from 0 to 100, the mean level of economic development among the countries in the world is. . . ( 4 )
What is the basic formula for the z-score other than table of areas?. . . ( 4 )
Alexa got 144 on her test which has a mean of 128 and a standard deviation of 34. What is her z-scor. . . ( 4 )
How do you calculate the z score for the raw score of 10 based on the following distribution: 8, 9,. . . ( 3 )
How do you find a z score such that 8% of the area under the curve is to the right of Z?. . . ( 4 )
How do you calculate a z-score on discrete data?. . . ( 4 )
How do you calculate z-scores from batting averages?. . . ( 4 )
What does a Z-score look like on a graph?. . . ( 4 )
Having obtained the z score and then derived the percentage... what does the percentage tell you?. . . ( 4 )
How do you calculate a Z-score with a two-sided specification limit? What is the DPMO?
I have a. . . ( 4 )
What percent of the time should this occur? (Z-Score) ?. . . ( 4 )
How unusual is this event (Z-Score)?
A department store, on average, has daily sales of $28,. . . ( 5 )
Can a z score be calculated by input of a proportion only?. . . ( 4 )
What is the z value for 1.648?. . . ( 4 )
What is the difference between a Z-Scores and Process Sigma?. . . ( 4 )
Where can I find a Z score chart ?. . . ( 5 )
What is the critical z score for a one tailed test with alpha = .01.. . . ( 4 )
Joe received a z score of -1.50 on a classroom test. This means that, compared to his classmates, J. . . ( 5 )
