Round each z-score to the nearest hundredth. A data set has a mean of x = 6.8 and a standard deviation of 2.5. Find the z-score. x=9.0

Wotzdorfg 2020-11-01 Answered
Round each z-score to the nearest hundredth.
A data set has a mean of
x=6.8
and a standard deviation of 2.5. Find the z-score.
x=9.0
You can still ask an expert for help

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question

Expert Answer

grbavit
Answered 2020-11-02 Author has 109 answers
Obtain the Z-score for the random variable X value equals 9.0.
The Z-score for the random variable X value equals 9.0 is obtained below as follows:
Let X denote the random variable with the population mean 9.0 and the standard deviation of 2.5.
The required value is,
Z=Xμσ
=9.06.82.5
=2.22.5=0.88
The Z-score for the random variable X value equals 9.0 is 0.88.
Not exactly what you’re looking for?
Ask My Question
Jeffrey Jordon
Answered 2021-11-14 Author has 2064 answers

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Relevant Questions

asked 2021-03-18

A population of values has a normal distribution with μ=133.5 and σ=5.2. You intend to draw a random sample of size n=230.
Find the probability that a single randomly selected value is between 133.6 and 134.1.
P(133.6<X<134.1)=?
Write your answers as numbers accurate to 4 decimal places.

asked 2021-02-21

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 192 had kids. Based on this, plot a 99% confidence interval for the proportion of adult residents who are parents in a given county.
Express your answer in the form of three inequalities. Give your answers in decimal fractions up to three places <p< Express the same answer using a point estimate and a margin of error. Give your answers as decimals, to three places.
p=±

asked 2022-01-27
On a standard measure of hearing ability the mean is 300 and the standard deviation is 20. What is the z-score for a person who scores 310?
asked 2022-01-16
What are the mean and standard deviation of a binomial probability distribution with n=69 and p=523?
asked 2021-06-11
Chances: Risk and Odds in Everyday Life, by James Burke, reports that only 2% of all local franchises are business failures. A Colorado Springs shopping complex has 137 franchises (restaurants, print shops, convenience stores, hair salons, etc.). Let r be the number of these franchises that are business failures. Explain why a Poisson approximation to the binomial would be appropriate for the random variable r. What is n? What is p? What is λλ (rounded to the nearest tenth)?
asked 2022-03-25

Assume a binomial probability distribution with n = 50 and p =0.25. Compute the following: a. The mean and standard deviation of the random variable. b. The probability that X is 15 or more. c. The probability that X is 10 or less.

asked 2021-06-04
Find the correlation coefficient between the tandom variables X and Y if the covariance of X and Y is 0.9 and variances of the random variables X and Y are 4 and 9, respectively
1)0.142
2)0.133
3)0.150
4)0.125