Mathematics, 29.06.2021 20:00 annadel742

The probability that a tennis set will go to a tiebreaker is 13%. In 120 randomly selected tennis sets, what is the mean and the standard deviation of the number of tiebreakers

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Answer from: lizdeleon248

$\mu = 15.6$

$\sigma =3.684$

Step-by-step explanation:

Given

$p =13\%$

n = 120

Solving (a): The mean

This is calculated as:

$\mu = np$

So, we have:

$\mu = 13\% * 120$

$\mu = 15.6$

Solving (b): The standard deviation

This is calculated as:

$\sigma = \sqrt{\mu * (1 - p)$

So, we have:

$\sigma = \sqrt{15.6 * (1 - 13\%)$

$\sigma = \sqrt{15.6 * 0.87$

$\sigma =\sqrt{ 13.572$

$\sigma =3.684$

Answer from: Quest

just sum

10 + 10 = 20

Answer from: Quest

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

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The probability that a tennis set will go to a tiebreaker is 13%. In 120 randomly selected tennis se...