3 years ago

Complete the pattern 0.02 , 0.2

1 answer:

3 0

It looks like the pattern is x 10, because that's how you get from 0.02 to 0.2. So, the pattern would go 0.02, 0.2, 2, 20, 200, 2000, etc.

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3 years ago

The mouse weights (in grams) of a random sample of 100 mice involved in a nutrition experiment are: Interval 41.5----43.5 43.5

LUCKY_DIMON [66]

Answer:

(a) The mean of the weight of the mice is 50.26 grams.

(b) The standard deviation of the weight of the mice is 14.08 grams.

Step-by-step explanation:

(a)

The mean is given as follows:

$\bar X=\frac{\sum f_{i}x_{i}}{\sum f_{i}}$

$=\frac{5026}{100}\\\\=50.26$

Thus, the mean of the weight of the mice is 50.26 grams.

(b)

Compute the standard deviation as follows:

$s=\frac{1}{\sum f_{i}-1}[\sum f_{i}x_{i}^{2}-\frac{1}{\sum f_{i}}(\sum f_{i}x_{i})^{2}]$

$=\frac{1}{100-1}[254001-\frac{1}{100}(5026)^{2}]\\\\=\frac{1}{99}\times 1394.24\\\\=14.08323\\\\\approx 14.08$

Thus, the standard deviation of the weight of the mice is 14.08 grams.

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4 years ago