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Orlov [11]
3 years ago
6

find the margin of error to use for this sample mean sushi based on a sample of 35 people he average out of pieces of sushi a pe

rson can eat is 16 pieces with a standard deviation of 8 pieces of sushi .constructs 90% confidence interval for the mean of amount of sushi pieces a person can eat statistics
Mathematics
1 answer:
NNADVOKAT [17]3 years ago
7 0

Answer:

{13.7756,18.2244}

Step-by-step explanation:

Given the sample size, the margin of error can be calculated with the formula M=Z*\frac{\sigma}{\sqrt{n}} where Z is the critical value for the desired confidence level, σ is the population standard deviation, and n is the sample size. Therefore, our margin of error for a 90% confidence level is:

M=Z*\frac{\sigma}{\sqrt{n}}=1.645*(\frac{8}{\sqrt{35}})=2.2244

The formula for a confidence interval is CI=\bar{x}+M where x-bar is the sample mean. Therefore, the 90% confidence interval for the mean amount of sushi pieces a person can eat is:

CI=\bar{x}\pm[M]=16\pm2.2244={13.7756,18.2244}

Therefore, we are 90% confident that the true mean amount of sushi pieces a person can eat is contained within the interval {13.7756,18.2244}

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vampirchik [111]

The surface area of the monument shaped like a square pyramid is 14 m².

<h3>Area </h3>

Area is the amount of space that is occupied by a two dimensional shape or object.

From the diagram

Area of each triangle = (1/2) * base * height = (1/2) * 2 * 2.5 = 2.5 m²

Area of square = length * length = 2 m * 2 m = 4 m²

Surface area of monument = 4(2.5) + 4 = 14 m²

The surface area of the monument shaped like a square pyramid is 14 m².

Find out more on Area at: brainly.com/question/25292087

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2 years ago
50 POINTS! a shirt that normally costs $30 id on sale for $21.75. What percent of the regular price is the sale price
77julia77 [94]

Answer:

72.5%

Step-by-step explanation:

The fraction is $21.75/$30 = 0.725.

To make this a percentage, multiply by 100%:

... 0.725 × 100% = 72.5%

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We assume the question is correct as written: "<u>of</u> the regular price." The answer is the complement of this, 27.5%, if the wording is supposed to be "<u>off</u> the regular price."

7 0
3 years ago
What grade r u in ( i´m boredd)
Fudgin [204]
I’m in 10th grade :)
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2 years ago
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I don’t know why i’m confused on this one
cestrela7 [59]

dude its going to 14cm

8 0
3 years ago
The numerator of a fraction is 3 less then the denominator. If 1 is added to the numerator, the value of the fraction becomes 3/
andrew11 [14]

The fraction is \frac{5}{8}

Step-by-step explanation:

Let,

The denominator of fraction = x

Numerator of fraction = x-3

Fraction = \frac{x-3}{x}

According to given statement;

1 is added to the numerator, the value of the fraction becomes 3/4.

\frac{x-3+1}{x}=\frac{3}{4}\\\\\frac{x-2}{x}=\frac{3}{4}

Using cross multiplication

4(x-2)=3*x\\4x-8=3x\\4x-3x=8\\x=8

Fraction = \frac{x-3}{x}=\frac{8-3}{8}=\frac{5}{8}

Keywords: fraction, division

Learn more about fractions at:

  • brainly.com/question/11549940
  • brainly.com/question/11584312

#LearnwithBrainly

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3 years ago
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