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71 Answered Questions for the topic Normal Distribution

Normal Distribution Math Statistics

07/27/20

Data Management Normal Distribution Probability

The heights of 16-month-old oak seedlings are normally distributed with a mean of 31.5 cm and a standard deviation of 10 cm. What is the range of heights between which 5 % of the seedlings will... more
Normal Distribution Math Statistics

07/27/20

Data Management Probability, Standard Deviation, and Normal Distribution Question:

Hi, how would i get started on solving this question? The average monthly rainfall in Southern California is 26 mm. If rainfall data over the year is normally distributed with a standard deviation... more
Normal Distribution Statistics

07/10/20

How can I estimate the probability of a random variable from one population being greater than all other random variables from unique populations?

Lets assume I have samples from 4 unique populations. Let's also assume I have a mean and standard deviation from each of these populations, they are normally distributed and completely independent... more
Normal Distribution Math Statistics

06/12/20

probability in statistics

The number of hours an American adult sleeps each night follows a Normal distribution with an average of 6.9 hours per night with a standard deviation of 0.68 hours. If we randomly select one... more
Normal Distribution Statistics Standard Deviation

05/12/20

what is the z score?

the number of hits a particular website receives in a day is normally distributed with a mean of 6250 hits and a standard deviation of 480 hits. what is the Z score for a day in which the website... more
Normal Distribution Probability Standard Deviation

03/22/20

Probability & Distribution question

Thank you so much!! I really want to master this unit :(
Normal Distribution Math Statistics

12/11/19

Have a final pleaseee help

In a normal distribution with mean 850 in standard deviation 120 find the probability that a data value picked at random is greater than 1169show work!
Normal Distribution Math Statistics

12/01/19

SAT scores: The College Board reports that in a recent year, the mean mathematics SAT score was 514, and the standard deviation was 118. A sample of 65 scores is chosen.

SAT scores: The College Board reports that in a recent year, the mean mathematics SAT score was 514, and the standard deviation was 118. A sample of 65 scores is chosen. a. What is the probability... more
Normal Distribution Math Statistics

12/01/19

Baby weights: According to a recent National Health Statistics Reports, the weight of male babies less than 2 months old in the United States...

Baby weights: According to a recent National Health Statistics Reports, the weight of male babies less than 2 months old in the United States is normally distributed with mean 11.5 pounds and... more
Normal Distribution Statistics

10/17/19

Inverse normal distribution

The SAT test is a test taken by any students to enter college. THe mean of the math section is 500 with a standard deviation of 100. The scores are normally distributed. What score is the cutoff... more
Normal Distribution Algebra 2 Z Scores

09/08/19

Normal Distribution and Z scores

The SAT Mathematics are know to follow an approximate normal distribution with a mean of 500 and a standard devation of 100. The ACT Mathematics are known to follow an approximate normal... more

08/02/19

percentage of population and probability of coin toss

hello there,I would to help me how to solve these two problems. 1- Assume the world human population heights follow a perfect normal distribution with standard deviation of 20 and mean of 150, what... more
Normal Distribution Statistics Probability

06/15/19

Normal Distribution Question

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.)μ = 4; σ = 2P(3 ≤ x ≤ 7) 
Normal Distribution Probability

06/07/19

How do I find the probability that X is greater than 16.1

assume that X has a normal distribution, and find the indicated probabilityThe mean is 15.2And standard deviation is 0.9Find the probability that X is greater than 16.1
Normal Distribution Probability

05/17/19

The life of a Radio Shack record player is normally distributed with a mean of 3.2 years and a standard deviation of 0.8 years. Radio Shack guarantees its record players for 2 years.

(a) Find the probability that a record player will last less than 2 years?(a) Find the probability that a record player will last more than 4 years?
Normal Distribution Math Statistics

05/16/19

normal distribution

Battery manufacturers compete on the basis of the amount of time their products last cameras and toys. A manufacturer of alkaline has observed that its batteries last for an average of 26 hours... more
Normal Distribution Statistics

04/25/19

Normal Distribution

Assume that human body temperatures are normally distributed with a mean of 98.23°F and a standard deviation of 0.62°F.a. A hospital uses 100.6°F as the lowest temperature considered to be a... more
Normal Distribution

08/07/18

mean: 21.1 and the standard deviation 5.0. Are any of these values unusual? Why or why not?

The ACT is an exam used by colleges and universities to evaluate undergraduate applicants. The test scores are normally distributed. In a recent year, the mean test score was 21.1 and the standard... more
Normal Distribution Binomial Binomial Distribution

07/17/18

Binomial as Normal

Chelsea play 38 league games in a season. Their probability of losing each game is 0.25. If they lose fewer than 8 games, they will win the league. What is the probability they win the... more
Normal Distribution Statistics Probability

04/02/18

There is a 88.4% chance that my value of x is 30 or greater. If I assume my data is normally distributed..

There is a 88.4% chance that my value of x is 30 or greater. If I assume my data is normally distributed, can I determine the likelihood that my value of x is 26, 27, 28, 29, 31, 32, 33, 34... more

The mean Algebra 2 test score is 81.5, with a standard deviation of 5.1. Assuming a normally distributed curve..

What percent of students scored between 81.5 and 91.7?   Please explain.
Normal Distribution Statistics Statistics Question

02/18/18

read the description . I need work and an explanation

Tom and Jan are planning on applying to attend KSU. Tom takes the ACT while Jan decides to take the SAT. The mean score on the ACT is a 17 with a standard deviation of 5, and the SAT mean score is... more
Normal Distribution

11/19/17

Find the area under the standard normal probability distribution between the following pairs of​ z-scores.

Z= -0.12 Z=0
Normal Distribution

11/19/17

Find the area under the standard normal probability distribution between the following pairs of​ z-scores.

Z= -1.48 Z=0
Normal Distribution

11/19/17

Find the area under the standard normal probability distribution between the following pairs of​ z-scores.

Z= -2.00 and Z=0
1 3

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