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yulyashka [42]
3 years ago
13

A researcher randomly surveyed two separate age groups to determine the number of hours teens spend on the Internet each week. T

he results are shown in this table. 13- to 14-year-olds 12 8 7 8 9 6 7 7 9 10 15- to 16-year-olds 15 6 21 12 13 12 8 9 7 10 Based on these results, which conclusions can you draw about these two groups of teens? Select each correct answer.
A. On average, 15- to 16-year-olds spend a few hours more on the Internet each week compared to 13- to 14-year-olds.
B. On average, 15- to 16-year-olds spend a few hours less on the Internet each week compared to 13- to 14-year-olds.
C. On average, the two groups of teens spend about the same amount of time each week on the Internet.
D. The amount of time that 15- to 16-year-olds spend on the Internet each week is more variable than the amount time 13- to 14-year-olds spend.
E. The amount of time 15- to 16-year-olds spend on the Internet each week is less variable than the amount time 13- to 14-year-olds spend.
F. The amount of time that the two groups spend on the Internet each week varies by about the same amount.
Mathematics
2 answers:
Papessa [141]3 years ago
8 0
The answer to this is A.
MrRissso [65]3 years ago
3 0

Answer:

Option A and D.

Step-by-step explanation:

In this question the given table is of two separate age groups to determine the number of hours teens spent on the internet each week.

From the table

average hours spent by teens between the age of 13-14 years old

=  (12+8+7+8+9+6+7+7+9+10+15)/10 = 83/10 = 8.3 hours

average hours spent by teens between age of 15-16 years old

=(15+6+21+12+13+12+8+9+7+10)/10 = 113/10 = 11.3 hours

From these averages we can conclude

A) 15-16 year old spend a few hours more than 13-14 year old teens.

D. The amount that 15-16 year old teens spend on internet is more variable than the time spent by 13-14 years old.

Option A and D are the correct options.

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Korvikt [17]

Answer:

∝ for portfolio A = E(rA) - Required return predicted by CAPM

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∝ for portfolio B = E(rB) - Required return predicted by CAPM

                           = 0.14 - [0.06 + 1.5 × (0.12 - 0.06)]

                           = 0.14 - [0.06 + 0.09]

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7 0
3 years ago
Tim bought nine new baseball trading cards to add to his collection. The next day his dog ate half of his collection. there are
Dmitrij [34]

Answer:

77

Step-by-step explanation:

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7 0
2 years ago
Which choice is equivalent to the product below?
posledela
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7 0
3 years ago
There are two numbers whose sum is 71. One number is twice the other. What are the numbers?
MrMuchimi
Hello! I would love to help!

Let's think...

What number times 2 plus that number is equal to 71.

Let's set up an equation!

What number times 2 (2x) + that number (x) is equal to 71?

Let's write the formal equation now!

2x + x = 71

Let's solve!

Start by combining like terms!

2x +x is 3x

Okay, now we have 3x=71

Let's solve by dividing each side by 3.

Now we have 23.667 or 23 2/3=x

So, the first number is 23 2/3

Let's multiply that by 2 to get the other number!

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So, the two answers are 47 1/3 and 23 2/3.

To check, you can add them together, and see if it comes out as 71.

47 1/3 + 23 2/3 = 71

Those are the right answers!


Hope this helps! Comment if you have questions! :)
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meriva
The solution is n=-4.
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