3 years ago

PLEASE HELPPP 10 points and will mark brainly!!!!!!

Mathematics

1 answer:

snow_tiger [21]3 years ago

6 0

Answer:

-.095

Step-by-step explanation:

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a) $population\hspace{0.1cm} mean = \frac{64 + 77 + 89 + 69 + 89 + 65 + 88 + 69 + 87}{9} = 77.44$

b) $sample\hspace{0.1cm} mean 1 = \frac{65 + 69 + 77}{3} = 70.3$

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the mean pulse rate of sample 2 underestimates the population mean.

Step-by-step explanation:

i) population size, N = 9

a) $population\hspace{0.1cm} mean = \frac{64 + 77 + 89 + 69 + 89 + 65 + 88 + 69 + 87}{9} = 77.44$

b) $sample\hspace{0.1cm} mean 1 = \frac{65 + 69 + 77}{3} = 70.3$

$sample\hspace{0.1cm} mean 2 = \frac{64 + 69 + 77}{3} = 70$

c) both the means of the two samples underestimate the population mean.

the mean pulse rate of sample 1 underestimates the population mean.

the mean pulse rate of sample 2 underestimates the population mean.

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I don't like math it makes me sad

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