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g100num [7]
4 years ago
15

A national random sample of 654 women aged 20 – 29 years was taken, and each woman's body mass index (BMI) was measured. The sam

ple data had mean BMI ????¯=26.8 and standard deviation ????=7.42 . What is the 95% ???? confidence interval (????,????) for the mean BMI of all young women?
Mathematics
1 answer:
irakobra [83]4 years ago
6 0

Answer:

The required interval is (26.23 , 27.37)

Step-by-step explanation:

The mean is = 26.8

The standard deviation is = 7.42

n = 654

At 95% confidence interval, the z score is 1.96

To find the desired interval we will calculate as:

26.8+1.96(\frac{7.42}{\sqrt{654} } )

And 26.8-1.96(\frac{7.42}{\sqrt{654} } )

26.8+0.57 and 26.8-0.57

= 27.37 and 26.23

So, the required interval is (26.23 , 27.37)

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3 years ago
The following table shows the number of classes that
Tresset [83]

Answer:

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6/3 = 3+ 0.5

The process would be different if some values are the same values already on the chart total of each class.

ie) 20  31  14  22 20 31

small data like this below you can rearrange

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and select the middle value = 21

Step-by-step explanation:

If there is an even number of numbers locate the two middle numbers so that there is an equal number of values to the left and to the right of these two numbers. Step 3: If there is an odd number of numbers, this middle number is the median. If there is an even number of numbers add the two middles and divide by 2.

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3 years ago
which equation represents a line parallel to the line whose equation is -2x+3y=-4 and passes through the point (1,3)?
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The slope of the line has to be the same the the equation given to be parallel.

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4 0
3 years ago
Read 2 more answers
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