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satela [25.4K]
4 years ago
10

Which sample fairly represents the population? Check all that apply. measuring the heights of every fiftieth person on the schoo

l roster to determine the average heights of the boys in the school calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment observing every person walking down Main Street at 5 p.m. one evening to determine the percentage of people who wear glasses sending a confidential e-mail survey to every one-hundredth parent in the school district to determine the overall satisfaction of the residents of the town taking a poll in the lunch room (where all students currently have to eat lunch) to determine the number of students who want to be able to leave campus during lunch
Mathematics
2 answers:
natta225 [31]4 years ago
7 0

The ans is calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment.


Minchanka [31]4 years ago
5 0
<span>measuring the heights of every fiftieth person on the school roster to determine the average heights of the boys in the school

wrong as should be boys only

</span><span>calling every third person on the soccer team’s roster to determine how many of the team members have completed their fundraising assignment 

is the ans</span>
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Answer:

9x² - 4/3x + ¼

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(3x - ½)²

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A basketball player participates in a one-and-one free throw situation. The player has a 70% free throw percentage. What is the
julia-pushkina [17]

Answer:

The average number of points this player will get in 100 one-and-one free throw situations is 70.

Step-by-step explanation:

For each free throw, there are only two possible outcomes. Either the player makes it, or he does not. The probability of the player making a free throw is independent of other free throws. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

The expected value of the binomial distribution is:

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70% free throw percentage.

This means that p = 0.7

What is the average number of points this player will get in 100 one-and-one free throw situations?

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E(X) = np = 100*0.7 = 70

The average number of points this player will get in 100 one-and-one free throw situations is 70.

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3 years ago
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The top base of the trapezoid is given as 7 cm. The bottom base of the trapezoid can be found with 7+5+5 = 17 cm. The height is given as 5 cm. Then, plug these values into the formula.

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