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igor_vitrenko [27]
3 years ago
7

(5 + 61) - (12 + 71)

Mathematics
2 answers:
Lesechka [4]3 years ago
5 0

Answer:

-17

Step-by-step explanation:

Look at the attachment

k0ka [10]3 years ago
3 0

Answer:

-17

Step-by-step explanation:

(5+61)-(12+71)

(66)-(83)

-17

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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
Read 2 more answers
What is 92.9 rounded to the nersst whole number
sammy [17]
The nearest whole number would be 93 because you round up if the decimal place is greater than 5 and down if it's less.
5 0
3 years ago
Umm it’s to question just label it a and b
xxMikexx [17]

A) Scale of map is 1: 30,000

This is assuming that it meant 1 centimetre = 30,000 metres, for it gives no other information.

Multiply 1 with 30,000: 30,000 x `1 = 30,000

30,000 metres is your answer.

B) Scale is 1 inch: 6 miles. You are given 2.5 inches.

Remember that 1 inch = 6 miles.

Multiply 2.5 to both sides: (2.5) * 1 inch = (2.5) * 6 miles

2.5 inch = 2.5 * 6 miles

2.5 inch = 15 miles

15 miles is your answer.

~

3 0
3 years ago
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Gabriel buys 5 pounds of apples for $8. Allie buys 10 pounds of the same apples for $16. Which of the following points is NOT on
Tom [10]
I don't understand your question
4 0
3 years ago
3/7 g=9 how do you do it?​
Lera25 [3.4K]

The answer is g = 21

just multiply the fraction.

3 × 7 is 21.

6 0
3 years ago
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