Question

a) Statistics scores are normally distributed with the mean of 75 and standard deviation of 7. What is the probability that a student scores between 80 and 88

155

likes

776 views

Answer to a math question a) Statistics scores are normally distributed with the mean of 75 and standard deviation of 7. What is the probability that a student scores between 80 and 88

$Expert avatar$

Timmothy

4.8

99 Answers

\mu=75,\sigma=7 calculate z-scores for 80 and 88 as z_1=\frac{80-\mu}{\sigma}=\frac{80-75}{7}\approx0.7143 z_2=\frac{88-\mu}{\sigma}=\frac{88-75}{7}\approx1.8571 refer to any z-score calculator or table to get P(0.7143 < Z < 1.8571) = 0.2059 approx required probability = 0.2059

Frequently asked questions (FAQs)

What is the composition of the functions f(x) = 2x + 3 and g(x) = x^2 - 5? (

Math question: Graph the slope-intercept equation y = 2x + 3. What are the coordinates of the y-intercept?

Math Question: Find the absolute maximum and minimum values of the function f(x) = x^3 - 6x^2 - 15x on the interval [-2, 5].

New questions in Mathematics

Kayla has $8,836.00 in her savings account. The bank gives Kayla 5%of the amount of money in account as a customer bonus. What amount of money does the bank give Kayla? Justify your answer on a 6th grade level.

what is the annual rate on $525 at 0.046% per day for 3 months?

Log(45)

2x2 and how much?

(5y 9)-(y 7)

How many anagrams of the word STROMEC there that do not contain STROM, MOST, MOC or CEST as a subword? By subword is meant anything that is created by omitting some letters - for example, the word EMROSCT contains both MOC and MOST as subwords.

solve for x 50x+ 120 (176-x)= 17340