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Mkey [24]
3 years ago
15

Need Help Please I'm Out Of Time ;(

Mathematics
1 answer:
STatiana [176]3 years ago
5 0

Answer:

last three questions are statistical question

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Which of these mappings is a function?
strojnjashka [21]

Answer:

B

Step-by-step explanation:

My power of guesssing :)

6 0
3 years ago
According to AccuData Media Research, 36% of televisions within the Chicago city limits are tuned to "Eyewitness News" at 5:00 p
umka21 [38]

Answer:

a) Mean: 900

Standard deviation: 24

b) Very unusual

c) Unusual

Step-by-step explanation:

We have a population proportion p=0.36 and we are taking a sample of size n=2500. This can be modeled as binomial sampling.

For this sampling distribution, we have a mean and STD that can be calculated as:

\mu_s=n\cdot p=2500\cdot0.36=900\\\\\sigma_s=\sqrt{n\cdot p(1-p)}=\sqrt{2500*0.36*0.64)}=\sqrt{576}=24

b) A value of 840 is a very unusual as is more than 2 standard deviations from the expected value of 900 (more exactly, at 2.5 standard deviations). Approximately 2% of the values are below 2 standars deviations from the mean.

Having 840 or less televisions tuned to "Eyewitness News" would have a probability of P=0.00621.

c) A value of 945 would be also unusual, but not as unusual as 840, as is between 1 and 2 standard deviation from the expected value.

Having 945 or more televisions tuned to "Eyewitness News" would have a probability of P=0.0304.

5 0
3 years ago
The degree of the term 2x^3 is<br> A. 2<br> B. x<br> C. 3<br> D. 2x
RSB [31]
Thw degree of 2x^3 is c. 3
3 0
3 years ago
Read 2 more answers
Work out the gradient of straight line AB where A=(-3,7) and B=(7,-8)
jolli1 [7]
I think it’s asking for you to multiply (-3,7) and (7,-8)
So if it is it would be -21 times-56= 1,176 AB=1,176
7 0
3 years ago
Solve the equation.<br> 8nminus​(3nplus4​)equals11
prisoha [69]

Answer:

n = 3

Step-by-step explanation:

8n - (3n + 4) = 11

8n - 3n - 4 = 11

5n = 11 + 4

5n = 15

n = 3

4 0
3 years ago
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