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2 years ago

If a population mean is 300 and the sample mean is 400, the difference of 100 is called:

Mathematics

1 answer:

rodikova [14]2 years ago

7 0

Answer:

B. Sample error.

Step-by-step explanation:

Such type of error is called Sample error.

Sample error occurs when

Sample error is a statistical error when an expert fails to choose a sample which symbolizes the whole data population and the outcomes of the sample do not reflect the outcomes from the whole population.

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What is the probability that you get two even numbers if you roll two dice?

RoseWind [281]

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Probability of both even is 12×12=14. Given they are both even there are 3 possible even numbers: 2,4,6.

Step-by-step explanation:

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3 years ago

What is the answer to (5x20)-6

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Answer:

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3 years ago

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3 years ago

The graphs below have the same shape. What is the equation of the red

anyanavicka [17]

Answer:

Option B is correct .

Step-by-step explanation:

According to Question , both the graph have same shape . If we look at the the first graph it cuts x - axis at (0 , 2) and ( 0 , -2) . Hence x = 2 and -2 are the zeroes of the equation .

And ,the given function is ,

$\implies f(x) = 4 - x^2 \\\\\implies f(x) = 4-x^2=0 \\\\\implies 2^2-x^2=0\\\\\implies (2-x)(2+x) = 0 \\\\\boxed{\red{\bf \implies x = 2 , (-2) }}$

Hence ,we can can see that x = 2 and (-2) are the zeroes of graph. 

This implies that if we know the zeroes , we can frame the Equation.

On looking at second parabola , it's clear that cuts x - axis at ( 1, 0 ) and (-1,0). So , 1 and -1 are the zeroes of the quadratic equation . Let the function be g(x) . Here , a and ß are the zeroes.

$\implies g(x) = (x-\alpha)(x-\beta) \\\\\implies g(x) = (1+x)(1-x) \\\\\boxed{\pink{\bf \implies g(x) = 1 - x^2}}$

Hence option B is correct .

8 0

2 years ago

Read 2 more answers

A couple deposits $20,000 into an account earning 5% annual interest for 30 years. Calculate the future value of the investment

makvit [3.9K]

The future value of the investment if the interest is compounded monthly is $89,354.89.

<h3>What is the future value of the investment?</h3>

Given that;

Principal P = $20,000
Annual interest rate r = 5% = 5/100 = 0.05
Time t = 30 years
Compound monthly = 12
Future value = A = ?

Using the compound interest formula;

A = P( 1 + r/n )^(nt)

We plug in our values.

A = 20000( 1 + 0.05/12 )^(12 × 30)

A = 20000( 1 + 0.0041666666666667)^(360)

A = 20000( 1.0041666666666667)^(360)

A = 20000( 4.46774965 )

A = 89354.89

Therefore, the future value of the investment if the interest is compounded monthly is $89,354.89.

Learn more about compound interest here: brainly.com/question/21270833

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5 0

1 year ago