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gtnhenbr [62]
2 years ago
15

4: 8 = 18: N WHAT IS THE ANSWER PO

Mathematics
1 answer:
UkoKoshka [18]2 years ago
4 0

Answer:

9

Step-by-step explanation:

8N=72

N=9

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Select the correct answer.
tigry1 [53]

Answer:

We can be 95% certain that the sample mean will fall within $44.87 and $46.93

Step-by-step explanation:

Empirical Rule:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

Central Limit Theorem:

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.

Population:

Mean $45.90, standard deviation $10.31.

Sample:

By the Central limit theorem, mean $45.90, standard deviation s = \frac{10.31}{\sqrt{400}} = \frac{10.31}{20} = 0.5155

Which interval can the branch manager be 95% certain that the sample mean will fall within?

By the Empirical Rule, within 2 standard deviations of the mean. So

45.90 - 2*0.5155 = $44.87

45.90 + 2*0.5155 = $46.93

We can be 95% certain that the sample mean will fall within $44.87 and $46.93

6 0
2 years ago
Read 2 more answers
Which one is more precise 7m ; 7.7m
gayaneshka [121]
7.7m is more precise because it has a decimal after it
8 0
3 years ago
Read 2 more answers
How many pies are there if someone eats 2 and then someone else eats 4 then I eat 13? We started with 200 pies.
Leno4ka [110]

Answer:

183

Step-by-step explanation: 13+4=17    200-17=183

6 0
3 years ago
Read 2 more answers
Each week, you drive 150 miles. Your car gets 25 miles to the gallon, and gas prices are $3 per gallon. How much gas money will
blondinia [14]
150 divided by 25 equals 6. 6 times 3 equals 18. This means that you will spend $18 on gas each week. 
6 0
3 years ago
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A bag contains 6 blue marbles, 10 red marbles, and 9 green marbles. If two marbles are drawn at random without replacement, what
bulgar [2K]
The answer is like this!

the total number of marbles all together is 25, so that would be the denominator.

blue: 6/25- simplified= already in simplified form
red:10/25- simplified= 2/5
green:9/25- simplified= already in simplified form

so the answer to your question is 2/5.

hope this helped!!



8 0
3 years ago
Read 2 more answers
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