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astra-53 [7]
3 years ago
6

What is this called?MATH Answer and I will give you brainiliest ​

Mathematics
2 answers:
Lapatulllka [165]3 years ago
8 0
Get off this app u is too young
VikaD [51]3 years ago
7 0

Answer:

injective function where range can't have many domain

Step-by-step explanation:

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One of the relatively uncommon instances in which researchers know the population standard deviation is in the case of the Intel
Phoenix [80]

Answer:

90% confidence interval for the mean IQ score in this community is [106.58 , 109.42].

Step-by-step explanation:

We are given that in general, the average IQ score in large, diverse populations is 100 and the standard deviation is 15.

Suppose that your sample of 300 members of your community gives you a mean IQ score of 108.

Firstly, the pivotal quantity for 90% confidence interval for the population mean is given by;

                        P.Q. = \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean IQ score = 108

            \sigma = population standard deviation = 15

            n = sample of members = 300

            \mu = population mean IQ score

<em>Here for constructing 90% confidence interval we have used One-sample z test statistics because we know about population standard deviation.</em>

<em />

So, 90% confidence interval for the population mean, \mu is ;

P(-1.645 < N(0,1) < 1.645) = 0.90  {As the critical value of z at 5% level

                                                of significance are -1.645 & 1.645}  

P(-1.645 < \frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n} } } < 1.645) = 0.90

P( -1.645 \times {\frac{\sigma}{\sqrt{n} } } < {\bar X -\mu} < 1.645 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.90

P( \bar X-1.645 \times {\frac{\sigma}{\sqrt{n} } } < \mu < \bar X+1.645 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.90

<u>90% confidence interval for</u> \mu = [ \bar X-1.645 \times {\frac{\sigma}{\sqrt{n} } } , \bar X+1.645 \times {\frac{\sigma}{\sqrt{n} } } ]

                                      = [ 108-1.645 \times {\frac{15}{\sqrt{300} } } , 108+1.645 \times {\frac{15}{\sqrt{300} } } ]

                                      = [106.58 , 109.42]

Therefore, we can be 90% confident that the mean IQ score in this community lies between 106.58 and 109.42.

8 0
3 years ago
(4 points)
liubo4ka [24]

Answer:

hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Step-by-step explanation:

3 0
2 years ago
The sides of a triangle measure 2x + 5, X – 4, and
sp2606 [1]

Answer x = 24 + 3x

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the meaning of the exponent in the expression 16^1/4?
Vaselesa [24]

Answer:

it is an unknown exponent so you have to find out the other part of the expression then you do the exponent. so the answer is two

Step-by-step explanation:

16^1/4

16 1/4

4÷2×2×2×2=2

7 0
3 years ago
F(x)=3^x+2 domain and range
Irina-Kira [14]

Answer:

domain: (-∞  ,∞)

range: (2,∞ )

Step-by-step explanation:

6 0
2 years ago
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