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Author Question: A company has developed a new battery, but the average lifetime is unknown. In order to estimate ... (Read 47 times)

theo

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on: Jun 24, 2018
A company has developed a new battery, but the average lifetime is unknown. In order to estimate this average, a sample of 110 batteries is tested and the average lifetime of this sample is found to be 200 hours. The 200 hours is the value of a:
 
  A) parameter.
  B) statistic.
  C) sampling frame.
  D) population.

Question 2

A professor collected data on the number of absences in an introductory statistics class of 100 students over the course of a semester. The data are summarized below.
 
  Number of Absences 0 1 2 3 4 5 6
  Number of Students 5 13 24 23 17 11 7
  What is the weighted mean number of absences per semester?
  A) 3.14
  B) 2.0
  C) 2.95
  D) 3.07


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stillxalice

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

B

Answer to Question 2

C


theo

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Reply 2 on: Jun 24, 2018
:D TYSM

ttt030911

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Reply 3 on: Yesterday
Wow, this really help

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