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TiliK225 [7]
3 years ago
12

100 POINTS!!!!!!!!

Mathematics
2 answers:
liq [111]3 years ago
8 0

Answer:

the last answer is correct

Step-by-step explanation:

There is a 99% chance that the population mean is between 68 and 72 beats per minute.

yawa3891 [41]3 years ago
5 0

Form the confidence level (99%), we calculate the "alpha" value

alpha=1-(99/100)=0.01

Now, calculate the critical probability (p-start)

p*=1-(alpha/2)=1-(0.01/2)=0.995

z-score could be calculated from p*,,,

z-score=2.57583

Now, calculate the Margin of Error:

standard deviation = s

number of adults = n

ME=(z*s)/(sqrt n)=(2.57583*12)/(sqrt 250) = 1.955

The confidence interval = mean +or- ME

                                     = 70+1.955  or  70-1.955

So that we can conclude that the 99% confidence interval for the mean beats per minute is 68.045 and 71.955

I hope you got the idea!

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I hope this helps!

Step-by-step explanation:

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Edit

Numerator

10 does not change.

+ - 7 Here a plus and a minus are put together. There is 1 minus sign which is an odd number of minus signs so the 7 is minus

- - 2 Here there are 2 minus signs. They become plus because 2 is even, and an even number of minuses become a plus so you have +2

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Denominator

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4 0
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