davidkim618p29ysd davidkim618p29ysd

01-08-2020
Mathematics

contestada

The mean of normally distributed test scores is 82 and the standard deviation is 5. If there are 241 test scores in the data sample, how many of them were in the 92 to 97 range?

Respuesta :

MathPhys MathPhys

01-08-2020

Answer:

5

Step-by-step explanation:

Find the z-scores.

z = (x − μ) / σ

z₁ = (92 − 82) / 5

z₁ = 2

z₁ = (97 − 82) / 5

z₂ = 3

Find the probability:

P(92 < X < 97)

P(2 < Z < 3)

P(Z < 3) − P(Z < 2)

0.9987 − 0.9772

0.0215

Find the number of tests:

0.0215 (241) ≈ 5

Answer Link

Otras preguntas

Never mind I already answered this..*oof welp

the ____________________ empire lead to the expansion of Islam? Byzantine Roman Persian Ottoman

How was the Silk Road a source of both stability and innovation? A Using the same route for hundreds of years, groups of traders began to form alliances that e

Please answer number 30 and explain your answer in detail! Thank you!

What is a quatrain? A pair of consecutive rhyming lines A point where a row of poetry ends A repetition of sounds in neighboring words A stanza made up of f

give an example of imagery

an unknown solution taste bitter and feels slippery it is mostly likely a

The ratio of the number of red buttons to the number of yellow buttons in a Box of 3:4. if there are 36 yellow buttons how many red buttons are there?

How might the issues Gregor faces as an insect reflect Franz Kafka’s upbringing in Prague as part of the Jewish minority in a divided culture of Czechs and Germ

A cognitive development theorist and a cognitive social learning theorist agree on many things. however, they disagree on