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Author Question: The maximum value of a distribution is 18.8 and the minimum value is 7.1. Use the range rule of ... (Read 47 times)

cdr_15

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on: Aug 1, 2018
The maximum value of a distribution is 18.8 and the minimum value is 7.1. Use the range rule of thumb to find the standard deviation. Round results to the nearest tenth.
 
  A) -0.1 B) 2.9 C) 17.1 D) 7.9

Question 2

Heights of men aged 25 to 34 have a standard deviation of 2.9.
 
  Use a 0.05 significance level to test the claim that the heights of women aged 25 to 34 have a different standard deviation. The heights (in inches) of 16 randomly selected women aged 25 to 34 are listed below.
   62.13 65.09 64.18 66.72 63.09 61.15 67.50 64.65
   63.80 64.21 60.17 68.28 66.49 62.10 65.73 64.72


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katkat_flores

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Reply #1 on: Aug 1, 2018
Answer to Question 1

B

Answer to Question 2

Test statistic: X2 = 9.260. Critical values: X2 = 6.262, 27.488. Fail to reject . There is not sufficient evidence to support the claim that heights of women aged 25 to 34 have a standard deviation different from 2.9 in.


cdr_15

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Reply 2 on: Aug 1, 2018
:D TYSM

Joy Chen

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Reply 3 on: Yesterday
Wow, this really help

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