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alukav5142 [94]
3 years ago
15

A sports marketing company is interested in how many hours teenagers in a town spend watching sports. They randomly select 40 te

enagers in this town and ask how many hours per week they spend watching sports. The mean amount is 6.25 hours with a standard deviation of 4.33 hours. Which of the following is the 90% confidence interval for the true mean amount of time teenagers from this town watch sports?
Find the t-table here.

(4.396, 8.104)
(4.865, 7.635)
(5.097, 7.404)
(5.245, 7.256)
Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
7 0

Answer:

C. (5.097, 7.404)

Step-by-step explanation:

EDGE 2020

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Westkost [7]

Answer:

The measure of angle A is 53 degrees

The measure of angle B is 37 degrees

Step-by-step explanation:

Here in this question, we are interested in calculating the measure of the two angle.

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mathematically ;

(7x + 4) + (4x + 9) = 90

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11x + 13 = 90

11x = 90-13

11x = 77

x = 77/11 = 7

The measure of angle A = 7x + 4 = 7(7) + 4 = 49 + 4 = 53 degrees

The measure of B = 4x + 9 = 4(7) + 9 = 28 + 9 = 37 degrees

3 0
3 years ago
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Mazyrski [523]
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Volume = ( 0.5*13*13)*7
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3 years ago
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Elena-2011 [213]

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Step-by-step explanation:

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5 0
3 years ago
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The area of a sector of an circle of a radius 5 cm, formed by an arc of length is 3.5cm. what is the answer
Natali5045456 [20]

Answer:

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Step-by-step explanation:

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3.5 = theta/360 * 31.4

theta/360 = 3.5/31.4

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3 years ago
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Answer:

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Step-by-step explanation:

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