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Use the data in the table shown to calculate the following.1. population mean for the semester grades2. population proportion of students who earned a grade less than 70

Use the data in the table shown to calculate the following.1. population mean for-example-1
User Ycseattle
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1 Answer

1 vote

The Solution:

Given:

Required to find:

1. population mean

2. population proportion of students who earned a grade less than 70.

Step 1:

The population mean.


Mean=((100*2)+(90*8)+(85*6)+(78*2)+(65*3))/(21)
Mean=(200+720+510+156+195)/(21)=(1781)/(21)=84.810\approx84.8

Thus, the population mean is 84.8

Step 2:


Proportion(student\leq70)=\frac{Number\text{ of students that earned less than 70}}{Total\text{ number of students}}
Proportion(student\leq70)=(3)/(21)=(1)/(7)\text{ \lparen or}\approx14.3\text{\%\rparen}

Therefore, the required proportion is 1/7 or 14.3%

Use the data in the table shown to calculate the following.1. population mean for-example-1
User Harto
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