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Anni [7]
3 years ago
7

Determine if the numerical value describes a population parameter or a sample statistic. 75u% of all instructors at your school

teach 2 or more classes. Answer1 PointKeypad Population Parameter Sample Statistic?
Mathematics
1 answer:
Alecsey [184]3 years ago
4 0

Answer: Population parameter.

Step-by-step explanation:

Population parameter : It is a number that summarize a term for the whole population . For example :population proportion , population mean , etc.

Sample statistics: It is a number that summarize a term for the sample . For example : sample proportion , sample mean, etc.

By considering the given statement :

Population of interest : " all instructors at school "

Since 75% of all instructors at your school teach 2 or more classes.

It means , 75% is describing population proportion of all instructors at your school teach 2 or more classes..

i.e. The numerical value describes a population parameter.

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In a large population, 82% of the households have cable tv. A simple random sample of 225 households is to be contacted and the
anzhelika [568]

Answer:

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For proportions, the mean is \mu = p and the standard deviation is s = \sqrt{\frac{p(1-p)}{n}}

In this problem, we have that:

p = 0.82, n = 225.

So

\mu = 0.82

s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.82*0.18}{225}} = 0.0256

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

7 0
3 years ago
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Calculate the value of x to one decimal place. a0inches
gtnhenbr [62]

Answer:

Step-by-step eNow examine the right triangle on the left in the figure.

x%2F10=sin%2850%29, in reference to the 50 degree angle, hypotenuse is that slanted segment of 10 units, and "x" is the opposite side from the 50 degree angle.

7 0
3 years ago
What is equation of a circle centered at (2, 4) with a radius of 2?
Bas_tet [7]

Answer:

(x-2)²+(y-4)²=4

Step-by-step explanation:

6 0
2 years ago
if 3 half-gallon containers of ice cream on sale for $6.69,what is the price for 2 half-gallon containers?​
kvv77 [185]
<h3>Answer:  $4.46</h3>

===================================================

Work Shown:

3 containers = 6.69 dollars

3/3 containers = 6.69/3 dollars .... divide both sides by 3

1 container = 2.23 dollars

2*(1 container) = 2*(2.23 dollars) ... multiply both sides by 2

2 containers = 4.46 dollars

A shortcut is to start with "3 containers = 6.69 dollars" and multiply both sides by 2/3

Each mention of "container" refers to a half-gallon container.

6 0
3 years ago
HELP PLEASE!<br><br><br> What is the coefficient of the term of degree 4 in this polynomial below?
Eddi Din [679]

Answer:

2

Step-by-step explanation:

The term of degree 4 is the term with the exponent of 4

2x^4

The coefficient is the number out in front

2x^4 has a coefficient of 2

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