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mr Goodwill [35]
3 years ago
8

Mathematics, Due Today.

Mathematics
1 answer:
vovikov84 [41]3 years ago
5 0
The first one is true
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A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a
777dan777 [17]

Answer:

The point estimate for \mu is 8.5 hours.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}.

In this problem

We are working with a sample of 81 adults, so the point estimae of the mean  is the mean number of weekly hours that U.S. adults use computers at home.

So, the point estimate for \mu is 8.5 hours.

6 0
2 years ago
If 400 kids went to the amusement park and only 120 came back how many got lost?
LekaFEV [45]

Answer:

280

Step-by-step explanation:

400 - 120=280

280= number of children lost

6 0
2 years ago
Read 2 more answers
What are two ways to describe the integer n on the expression -7 < n < -4?
Alchen [17]
Description 1: "The integer n is between -7 and -4, excluding both endpoints"

Description 2: "The integer n is larger than -7 and smaller than -4"
4 0
3 years ago
Bill and Pete shared 1/2 of a cake. Bill got to eat twice as much cake as Pete. What fraction of the whole cake did Bill eat?
KatRina [158]

Answer:

Step-by-step explanation:

Total cake shared=1/2

Pete share=x

Bill= twice as much as Pete

=2x

Pete's share+ Bill's share=total share

x+2x=1/2

3x=1/2

x=1/2÷3

x=1/2×1/3

=1/6

Pete's share=x=1/6

Bill's share=2x

=2(1/6)

=2/6

=1/3

3 0
3 years ago
Solve 3/2 x 10/3. Simplify if possible.
olga2289 [7]
Ok, for multiplication of fractions you do not need a common denominator so multiply top by top and bottom by bottom... let me know what you get 
6 0
3 years ago
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