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liq [111]
3 years ago
11

A.Q1: 8.5, Q3: 11, R:13

Mathematics
1 answer:
Assoli18 [71]3 years ago
5 0

Answer:

;

Step-by-step explanation:

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A research company desires to know the mean consumption of meat per week among people over age 40. A sample of 610 people over a
Papessa [141]

Answer: (3.0,\ 3.2)

Step-by-step explanation:

Confidence interval for population mean is given by :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}  (1)

, where \overline{x} = Sample mean

z_{\alpha/2}= Critical z-value

\sigma = Population standard deviation.

n= Sample size.

As per given , we have

n= 610

\sigma=1.1

\overline{x}=3.1

Significance level for 85% confidence : \alpha=1-0.85=0.15

By z-table critical two tailed z-value : z_{\alpha/2}=z_{0.075}=1.44

Put all values in (1) , we get

3.1\pm 1.44\dfrac{1.1}{\sqrt{610}}

3.1\pm 1.44\dfrac{1.1}{24.698}

3.1\pm 0.064

=(3.1-0.064,\ 3.1+0.064)=(3.036,\ 3.164)\approx(3.0,\ 3.2)

Hence, the 85% confidence interval for the mean consumption of meat among people over age 40.  = (3.0,\ 3.2)

5 0
3 years ago
A pound is equal to 0.454 kilograms, how many kilograms does a 142-pound man weigh
levacccp [35]

Answer:

64.468

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
A kite is flying 12 ft off the ground. Its line is pulled taut and casts an 8 -ft shadow. Find the length of the line. If necess
LenKa [72]
Answer

14.4 ft~

Step-by-step explanation

A kite is flying 12 feet off the ground, therefore the height is 12 (assuming the line is tied to the ground if a person is holding the line then the height would be less)

Assuming the sun is positioned in such a way that the shadow represents a horizontal distance. Horizontal distance of shadow = 8

Use Pythagoras Theorem

Where a^2 + b^2 = c^2

8^2 + 12^2 = 208

Square root 208 = 14.4~

~ Hoodini, here to help :)
6 0
2 years ago
A rectangle has a side length of 4 inches and an area of 18 square inches and a larger similar triangle has a corresponding side
evablogger [386]
I have to assume that you mean it is a similar rectangle, since a triangle can not be similar to a rectangle. In that case the original measurements are 4x4.5.

By doubling them, you get a rectangle with the measurements of 8x9 and thus the area is 72
7 0
3 years ago
A songwriter gets paid monthly at a rate of $150 for each song he completes last month he wrote 8 songs and got halfway through
Alja [10]
150 * 8 = $1,200
150 / 2 = $75

$1,200 + $75 = 1275
3 0
3 years ago
Read 2 more answers
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