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Sphinxa [80]
2 years ago
5

A group of friends is playing a game with the spinner shown. They win or lose money according to the segment the spinner lands o

n. How much money can a player expect to win or lose, on average, during 1 spin

Mathematics
1 answer:
Otrada [13]2 years ago
7 0
The 8 sectors appear to be equal in size, so equally likely.
The total of the winnings = 2 + 3 + -5 + -2 + 10 + 3 + -5 + -2 = 4
Expected winnings on average = 4 / 8 = $0.50.
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Evaluate the equation. 193b = 212.3
trasher [3.6K]

Answer:

b= 1.1

Step-by-step explanation:

193b= 212.3

divide both sides by 193 to isolate b

212.3÷193=1.1

3 0
2 years ago
Jerry had 45 tickets for games at a carnival.he used 1/3 of the tickets to play ball-toss game. He used 2/5 of the tickets to pl
MrRa [10]
45 / 3 = 15
45 - 15 = 30
30 / 5 = 6
6 x 2 = 12
30 - 12 = 18
The answer is D:18
7 0
2 years ago
An organization surveyed a random sample of their employees about their new vacation policy. Out of the employees surveyed, 83%
Mama L [17]

Answer:C.It can be concluded, with 95% confidence, that between 81% and 85% of all employees will rate the vacation policy as "delightful."

Step-by-step explanation:

5 0
3 years ago
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only
Semenov [28]

Answer:

Step-by-step explanation:

Hello!

The variable of interest is:

X: Number of people that support the candidate.

You need to calculate the sample size to estimate the population proportion of supporters given a confidence level of 99% and a margin of error of 4%

The margin of error of the confidence level for the population proportion is

d= Z_{1-\alpha /2} * \sqrt{\frac{p'(1-p')}{n} }

From this formula you have to clear the value of n:

\frac{d}{Z_{1-\alpha /2}}= \sqrt{\frac{p'(1-p')}{n} }

(\frac{d}{Z_{1-\alpha /2}})^2= \frac{p'(1-p')}{n}

n*(\frac{d}{Z_{1-\alpha /2}})^2= p'(1-p')

n= p'(1-p') * (\frac{Z_{1-\alpha/2}}{d} )^2

Z_{1-\alpha/2}= Z_{0.995}= 2.586

sample proportion "p'" since there is no sample information, nor any previous information is known, you have to consider it as the "worse case scenario" and use the value of p'= 0.50

d= 0.04

n= p'(1-p') * (\frac{Z_{1-\alpha/2}}{d} )^2= 0.5*0.5*(\frac{2.586}{0.04} )^2= 1044.9= 1045

She has to take a sample of 1045 people to estimate the population proportion of her supporters with a confidence level of 99% and a margin of error of 4%

I hope this helps!

4 0
2 years ago
Proving a parallelogram side theorem.
svp [43]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
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