course hero: which of the followings is correct regarding the value of z-score? (choose 2)

by Agnes Prohaska Published 3 years ago Updated 2 years ago 8 min read

What is true regarding the value of a z-score?

The value of the z-score tells you how many standard deviations you are away from the mean. If a z-score is equal to 0, it is on the mean. A positive z-score indicates the raw score is higher than the mean average. For example, if a z-score is equal to +1, it is 1 standard deviation above the mean.

What is correct regarding a normal distribution?

A normal distribution is the proper term for a probability bell curve. In a normal distribution the mean is zero and the standard deviation is 1. It has zero skew and a kurtosis of 3. Normal distributions are symmetrical, but not all symmetrical distributions are normal.

Which one out of the following is correct about the normal distribution?

In a normal distribution, the values of mean, median and mode are equal. So, the point (ii) is correct in the context of a normal distribution curve. Also, the normal distribution curve or bell curve is symmetric about the line $X = \mu $ . So, the point (i) is also correct in this context.

What information is not needed to calculate the z-score for a score?

A z score is the number of standard deviations a particular score is from the mean. The only information we need to convert any raw score to a z score is the mean and standard deviation of the population of interest.

What is the area under the normal distribution curve between Z and Z?

The total area under the curve is 1 or 100%. Every z-score has an associated p-value that tells you the probability of all values below or above that z-score occuring. This is the area under the curve left or right of that z-score.Nov 5, 2020

Which is the best definition of the z value?

The minimum and maximum value of the variable, Which is the best definition of the z-value? The distance between a value x and the mean, μ, divided by the standard deviation, σ

Which of the following about a normal distribution is true?

The correct option is C) The mean divides the distribution into two equal areas. Option C is correct because the normal distribution is a symmetric distribution. Its median is equal to the mean and hence, it divides the distribution into two equal parts.

Which one of the following is not true of the normal distribution?

Expert-verified answer

In a normal distribution graph, all the mean mode and median are equal. The total area under the normal distribution curve is 1 or 100%. It accurately shows how variable values are distributed. Therefore in the above statement, A discrete probability distribution is not true.Jul 1, 2020

Which of the following is incorrect with respect to use of Poisson distribution?

Which of the following is incorrect with respect to use of Poisson distribution? Explanation: Poisson distribution is used for modeling unbounded count data. 4. __________ random variables are used to model rates.

What is a z-score Why are standard scores important what do they allow researchers educators to do?

The standard score (more commonly referred to as a z-score) is a very useful statistic because it (a) allows us to calculate the probability of a score occurring within our normal distribution and (b) enables us to compare two scores that are from different normal distributions.

How do you find z-score on calculator?

Step 3: Use a formula to calculate every z-score.

Highlight L2 and type in the formula (L1-10) / 5.558 and then press Enter. The z-score of every individual value will automatically appear in column L2: What is this? Note: To enter “L1” in the formula, press 2nd and then press 1.Apr 14, 2020

How do you find the z-score of a data set?

To find a z score, subtract the mean of a population from the particular value in question, then divide the result by the population's standard deviation.