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Author Question: Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of ... (Read 15 times)

Kikoku

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on: Jul 24, 2018
Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of 20 dollars. If 64 of these repair bills are randomly selected, find the probability that they have a mean cost between 267 dollars and 269 dollars.
 
  A) 0.2881 B) 0.7881 C) 0.2119 D) 0.5517

Question 2

The heights of ten female students (in inches) in a college math class are listed below. Find the mean. 65 66 67 66 67 70 67 70 71 68
 
  A) 67.7 inches B) 65.5 inches C) 71.1 inches D) 70.0 inches


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JCABRERA33

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Reply #1 on: Jul 24, 2018
Answer to Question 1

A

Answer to Question 2

A


Kikoku

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Reply 2 on: Jul 24, 2018
Gracias!

momolu

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Reply 3 on: Yesterday
Wow, this really help

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