dbuchlerdb5599

23.11.2020 • 

Mathematics

The table shows the mean number of basketball goals made by four random samples of players from the
school team during this year's season.
Sample #
1
Sample Mean
Number of Goals
7
4
5
8
2.
3
4
Is a valid prediction for the mean of the population possible using these samples?
O No, there are not enough samples.
O Yes, the sample means are all less than 10.
O Yes, the variation of the sample means is small.
O No, the variation of the sample means is too great.

Ответ:

sospls352

11.12.2021

Mathematics

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Fraction = 4/7

Step by step Explanation

Let the denominator be x.

Numerator = 3 less than denominator

denominator = x

Numerator = (x – 3)

Now, Adding 5 to denominator

adding 2 to numerator.

Numerator = (x – 3 + 2)

Denominator = (x + 5)

(x – 3 + 2)/(x + 5)

According to the question

 (x – 3 + 2)/(x + 5) = 1/2

(x – 1)/(x + 5) = 1/2

2(x – 1) = 1(x + 5)

2x – 2 = x + 5

2x – x = 5 + 2

x = 7

So,

=> Denominator x = 7

=> Numerator (x – 3) => (7 – 3) = 4

= > Fraction = 4/7

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