Mathematics High School

On a highway, a random sample is taken of the speed, in mph, of 50 cars. A mean speed of 61.8 mph is calculated with a margin of error of +2.3 for a 95% confidence interval What is the interval estimate of the population mean?
A) 58.7 <h<64.9
B)59.5<h<61.8
C)59.5<h<64.1
D)61.8<h<64.1


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Answers

Answer 1
I am extremely bad at math and I am trying to help other to ask a question, but I personally think C
Answer 2

The interval estimate of the population mean when a random sample is taken of the speed on highway is 59.5<h<64.1. Option C is correct.

What is margin of error?

The probability or the chances of error while choosing or calculating a sample in a survey is called the margin of error.

The interval estimate of the population mean can be found out using the following formula:

[tex]\overline X\pm MOE[/tex]

Here, [tex]\overline X[/tex] is the average mean, and the MOE is the margin of error.

On a highway, a random sample is taken of the speed, in mph, of 50 cars.

A mean speed is 61.8 mphThe margin of error is +2.3 The confidence interval is 95%

Put the values in the above formula as,

[tex]61.8\pm 2.3\\59.5,641[/tex]

Thus, the interval estimate of the population mean

[tex]59.5 < h < 61.8[/tex]

Hence, the interval estimate of the population mean when a random sample is taken of the speed on highway is 59.5<h<64.1. Option C is correct.

Learn more about the margin of error here;

https://brainly.com/question/10218601

#SPJ2

Related Questions

factorize -pq -pr +mq +mr​

Answers

Answer:

(q + r) (m - p)

Explanation:

-pq - pr + mq + mr​Factor out common term 'p'

= -p(q + r) + mq + mr

Factor out common term 'm'

= -p(q + r) + m(q + r)

Factor out common term '(q + r)'

= (q + r) (-p + m)

(q + r) (m - p)

- PNW

Christina needed 8 pounds of flour to make cookies that will
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need to feed 66 people?

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Answer:

12

Step-by-step explanation:

4 pounds is 22 people

8 is 44

12 is 66

All triangles are equal to ______ degrees

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Answer:

180

Step-by-step explanation:

they are all equal too 180 degrees

8x(x+1)=(4x-3)(2x+1)

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Answer:

(3x+1)(2x+1)

Step-by-step explanation:

Answer:

[tex]x2[/tex]=[tex]\frac{5-\sqrt{113} }{8} , x2 = \frac{5+\sqrt{113} }{8}[/tex]

Step-by-step explanation:

hope this help and if you can give me brainliest

Margo participated in a surfing competition. During the competition, the height of the ocean waves increased from two feet to six feet. a. Identify how many times greater the amount of energy carried by the six-foot wave was than the amount of energy caried by the two-foot wave. Explain your reasoning.

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Answer:

three times the two foot wave wuold be the six foot wave

Step-by-step explanation:

because its right

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Answers

Answer:

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Step-by-step explanation:

x+5x<12

x+5x=12

12-5x

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3x + x - 7 = 10

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Answers

First you add 3x+x because they are like terms.

3x+x-7=10  

Your New Simplified Equation:

4x-7=10  

Now, you have to take out the -7 by adding a positive 7. Also you                          have to add +7 on the other side so add 7 to 10.

Your New Simplified Equation:

4x=17      Now, you divide both sides by 4.

Your New Simplified Equation:

x= 17/4 So, that's your answer :)

The cell phone price was originally $457. It is now being sold for $318. State the change to the nearest percent


I really need help

Answers

Answer:

30.4%

Step-by-step explanation:

Given data

originally price $457

new price= $318

Required

The percent mark down

Percent markdown= original- new/original*100

substitute

Percent markdown= 457- 318/457*100

Percent markdown= 139/457*100

Percent markdown=0.304*100

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Hence the price was reduced by 30.4%

The cylinder shown here has a height of 7 centimeters and a radius of 4 centimeters. What is the area of the base of the cylinder? Express your answer in terms of 1. Do not include units (cm2) in your answer. Use pi to represent the n symbol. For example: 321 would be typed as 32pi​

Answers

Answer: 16pi

Step-by-step explanation:

Please help don’t know answer

Answers

Answer: Slope: 2/3

y-intercept: 9

Step-by-step explanation:

The slope is equivalent to 2/3 and the y intercept is 9

Zoe went shopping for a new pair of pants. The listed price of the pair of pants was
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ASAP!

Answers

Answer:

3%

Step-by-step explanation:

46.35 - 45 = 1.35 (change)

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1.35/45 = 0.03

0.03 X 100 = 3

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You and a friend tutor for a total of 12 hours. Use the
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Answers

The answer is 2
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Answer:40

Step-by-step explanation:

100+10+10=3x

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Divide both sides by 3

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Answer:

40

Step-by-step explanation:

add 100+10+10 and divide it by 3

REEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

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Answer:

the middle sign

Step-by-step explanation:

4|m-n|
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Answers

you would first substitute -7 for m and 2 for n. It would look like this: 4| -7-2 | . we first solve the absolute value because it is the first step in PEMDAS or order of operations. -7-2 is equal to -9. Our equation should look like this now: 4 |-9| . we solve the absolute value portion, the absolute value of a negative number is the the same number but positive. the absolute value would be 9. (we just take the negative symbol off). we now have 4 x 9. This is equal to 36.

36 is the answer.

3.2÷(0.16+0.24)2( the 2 right next to this is a exponent)

Answers

Answer should be “20”

By the way next time just do (0.16+0.24)^2

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Washington, DC, was warmer in February (4.3°F)than in December (44°F). Write an inequality for this relationship.

Answers

Because December is really cold

Answer:

Step-by-step explanation:

4.3 °F > 4 1/4 °F

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Answers

Step-by-step explanation:

For a quadratic equation to have no real roots, the discriminant b² - 4ac must be negative.

For px² + 8x + 2 = 0,

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=> 8p > 64

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Hence the range for p is p > 8.

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Answers

.....The answer is C

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Answers

12% as a fraction is 12/100 but it’s simplest form is 3/25

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Answers

Answer:

-5x-3

Step-by-step explanation:

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-3x/-3 > -12/-3

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Learn more here: https://brainly.com/question/15816805

What is the value of 20+6•5/-2

Answers

Answer:

The answer is 25

Step-by-step explanation:

6•5=30

30+20=50

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PLS HELP NOOOOOOOOOOOOOOOOWWWWWWWWWWWWWW

Answers

Answer:

cant its blocked

Step-by-step explanation:

Question 2

If MNP = 107, what is NMQ?

Answers

Answer:

73 degrees

Step-by-step explanation:

73 degrees is the answer i think

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Please and thank you! x

Answers

Answer:

x = 4

Step-by-step explanation:

(7 + 2x) / 3 = 5

Cross product

7 + 2x = 5 * 3

7 + 2x = 15

Subtract 7 from both sides

2x = 15 - 7

2x = 8

Divide both sides by 2

x = 8/2

x = 4

Find the value of x. Your answer must be exact.
х
45° 18

Answers

Answer:

x = 63

Step-by-step explanation:

Simplifying

x + -18 = 45

Reorder the terms:

-18 + x = 45

Solving

-18 + x = 45

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '18' to each side of the equation.

-18 + 18 + x = 45 + 18

Combine like terms: -18 + 18 = 0

0 + x = 45 + 18

x = 45 + 18

Combine like terms: 45 + 18 = 63

x = 63

Simplifying

x = 63

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Answers

AFE=35 degrees because 180=55+90+x

Answer:

∠ AFE = 35°

Step-by-step explanation:

∠ EFD = ∠ BFC = 55° ( vertically opposite angles )

Since BD is a straight line , then

∠ EFD + ∠ AFE + AFB = 180°, that is

55° + ∠ AFE + 90° = 180

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Answers

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Step-by-step explanation:

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Step-by-step explanation:

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Step-by-step explanation:

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