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Mathematics

2 answers:

oksano4ka [1.4K]3 years ago

7 0

Answer:

yes the answer is the answer that you need lol thx

hope it helped :)

Step-by-step explanation:

mel-nik [20]3 years ago

7 0

To what question ?? I don’t see no question

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Based upon a smaller sample of only 170 st. paulites, what is the probability that the sample proportion will be within of the p

Pepsi [2]

Given that in 2008 the Better Business Bureau settled 75% of complaints they received (USA Today, March 2, 2009). Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is .75, the same as the overall proportion of complaints settled in 2008.

Part a) :

Suppose you select a sample of 450 complaints involving new car dealers. Show the sampling distribution of (to 4 decimals).

Population proportion = 0.75
sample size. n = 450
$Standard\ error=\sqrt{\frac{p(1-p)}{n}} \\ \\ =\sqrt{\frac{(0.75)(0.25)}{450}} = 0.0204$

Therefore, the sampling distribution has a proportion of 0.75 and a standard error of 0.0204.

Part b) :

Based upon a sample of 450 complaints, what is the probability that the sample proportion will be within .04 of the population proportion (to 4 decimals)?

The probability that the sample proportion will be within 0.04 of the population proportion is given by:

$P(p\ \textless \ 0.75\pm0.04)=2P\left(z\ \textless \ \frac{0.04}{0.0204} \right)-1 \\ \\ 2P(z\ \textless \ 1.961)-1=2(0.97505)-1=1.9501-1 \\ \\ =\bold{0.9501}$

Therefore, the probability that the sample proportion will be within .04 of the population proportion is 0.9501.

Part C:

Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of (to 4 decimals).

Population proportion = 0.75
sample size. n = 200
$Standard\ error=\sqrt{\frac{p(1-p)}{n}} \\ \\ =\sqrt{\frac{(0.75)(0.25)}{200}} = 0.0306$

Therefore, the sampling distribution has a proportion of 0.75 and a standard error of 0.0306.

Part D):

Based upon the smaller sample of only 200 complaints, what is the probability that the sample proportion will be within .04 of the population proportion (to 4 decimals)?


The probability that the sample proportion will be within 0.04 of the population proportion is given by:

$P(p\
 \textless \ 0.75\pm0.04)=2P\left(z\ \textless \ \frac{0.04}{0.0306} 
\right)-1 \\ \\ 2P(z\ \textless \ 1.306)-1=2(0.90429)-1=1.80858-1 \\ \\
 =\bold{0.8086}$

Therefore, the probability that the sample proportion will be within .04 of the population proportion is 0.8086.

8 0

3 years ago

A right rectangular prism has a volume of 470.40 cm³. The length of the solid is 6.4 cm and the width is 9.8 cm. What is the hei

andrezito [222]

If a rectangular prism has a volume of 470.40 cm³, and the length and width is equal to 6.4 and 9.8, we will find the height by using some inverse operations. We will use the variable h to represent height

Length x Width x Height = Volume
6.4 cm • 9.8 cm `• h = 470.40

470.40 ÷ (9.8 x 6.4)
 = 470.40 ÷ 62.72
 = 7.5

Check Answer:
Length x Width x Height = Volume
6.4 cm • 9.8 cm `• 7.5 = 470.40

Answer: 7.5 cm

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3 years ago

When a hockey player attempts a shot he is 26 feet from the left post of the goal and 30 feet from the right post. The distance

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Your answer will be 11 degrees

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3 years ago

Which expression represents the algebraic phrase “eleven less than seven times a number”?

STatiana [176]

11-7x because eleven less than is 11- and seven times a number is 7x

6 0

3 years ago

Each person in a group buys a movie ticket, a drink, and a popcorn. How much does the group pay when there are 4 people in the g

Cerrena [4.2K]

Answer:
$58.00

Step by step explanation:
We have $3.00+$7.50+$4.00=14.50
And then we multiply $14.50 by 4
Then we get $58.00

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