The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. No comma and no spaces.) a. between 360 and 460 days.Answer: Blank 1 b. more than 320 days.Answer: Blank 2 c. less than 280 days.Answer: Blank 3 The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standarddeviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. Nocomma and no spaces.)a. between 360 and 460 days.Answer: Blank 1b. more than 320 days.Answer: Blank 2c. less than 280 days.Answer: Blank 3

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The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. No comma and no spaces.) a. between 360 and 460 days. Answer: Blank 1 b. more than 320 days. Answer: Blank 2 c. less than 280 days.

The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. No comma and no spaces.) a. between 360 and 460 days. Answer: Blank 1 b. more than 320 days. Answer: Blank 2 c. less than 280 days.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 19PFA

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Question

The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. No comma and no spaces.)

a. between 360 and 460 days.

Answer: Blank 1

b. more than 320 days.

Answer: Blank 2

c. less than 280 days.

Answer: Blank 3

The lifetimes of a certain type of calculator battery are normally distributed. The mean lifetime is 400 days, with a standard
deviation of 50 days. For a sample of 6000 new batteries, determine how many batteries will last: (Answer in whole number. No
comma and no spaces.)
a. between 360 and 460 days.
Answer: Blank 1
b. more than 320 days.
Answer: Blank 2
c. less than 280 days.
Answer: Blank 3

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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