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Akimi4 [234]
3 years ago
7

If, for a sample in which the subjects are randomly chosen, the mean income is $45,000, the sample size is 1600, the standard de

viation is $4,000, and the standard error of the mean is $10, what, approximately, is the 95% confidence interval for the population mean?
Mathematics
1 answer:
jeka57 [31]3 years ago
6 0

Just add 45'000, 4,000, 10,divided by 95% = your answer.

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Estimate the sum by rounding the numbers to the nearest hundred and then adding: 539 + 221
Zina [86]

Answer:

700

Step-by-step explanation:

539 rounded to 500

221 rounded to 200

500 plus 200 is 700

5 0
3 years ago
Help me please thank youuuuu ^_^
OverLord2011 [107]

Answer:

x = 6

Step-by-step explanation:

2x - 3 = 9

so 9+3 = 12, and 12÷2 = 6

the value of x is 6

5 0
2 years ago
Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and st
kirill115 [55]

The area of the shaded region is 0.1271 (12.71%).

<h3>What is the z score?</h3>

Z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:

z = (raw score - mean)/standard deviation

Given:

Mean 0 and standard deviation 1. Hence, for z=-1.14:

P(z < -1.14) = 0.1271

The area of the shaded region is 0.1271 (12.71%).

Find out more on z score at: brainly.com/question/25638875

8 0
2 years ago
109.25714 x 0.0876 = 9.56 (sales tax)<br> helppp step by step on how they did this
kati45 [8]

Answer:

9.570925464=9.56

Step-by-step explanation:

multiply the numbers:

109.25714×0.0876=9.569.570925464=9.56

(Just so you know i put this answer in the other question you asked.)

Hope this helps

7 0
2 years ago
Make up an expression of your own that satisfies the following:
Nikolay [14]

There are infinitely many ways to answer this as there is no one single answer to pick from.

<h3>Here is one possible answer:   x^3 + 5x^2 + 7x + 12</h3>

The four terms are x^3, 5x^2, 7x and 12. They are separated by the plus signs.

The constant is 12. It does not have any variable attached to it.

Terms 5x^2 and 7x have coefficients of 5 and 7 respectively.

The leading term x^3 has a coefficient of 1, but 1*x^3 = x^3, meaning it's convention to leave the 1 out. So technically x^3 does not have a coefficient directly written/shown. Instead, its more implied.

4 0
3 years ago
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