All categories

3 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]3 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.

You might be interested in

Takes a word processor 20 minutes to spell check 6 pages, how long to check 27 pages

ivann1987 [24]

9514 1404 393

Answer:

90 minutes

Step-by-step explanation:

Assuming the time is proportional to the number of pages, you have ...

time/pages = 20/6 = T/27

Multiplying by 27 gives ...

T = 27(20/6) = 90

It is expected to take 90 minutes to check 27 pages.

6 0

3 years ago

Let f(x)=x^2f ( x ) = x 2. Find the Riemann sum for ff on the interval [0,2][ 0 , 2 ], using 4 subintervals of equal width and t

sladkih [1.3K]

Answer:

$A_L=1.75$

Step-by-step explanation:

We are given:

$f(x)=x^2$

$interval = [a,b] = [0,2]$

Since $n = 4$ ⇒ $\Delta x = \frac{b-a}{n} = \frac{2-0}{4}=\frac{1}{2}$

Riemann sum is area under the function given. And it is asked to find Riemann sum for the left endpoint.

$A_L= \sum\limits^{n}_{i=1}\Delta xf(x_i) = \frac{1}{2}(0^2+(\frac{1}{2})^2+1^2+(\frac{3}{2})^2)=\frac{7}{4}=1.75$

Note:

If it will be asked to find right endpoint too,

$A_R=\sum\limits^{n}_{i=1}\Delta xf(x_i) =\frac{1}{2}((\frac{1}{2})^2+1^2+(\frac{3}{2})^2+2^2)=\frac{15}{4}=3.75$

The average of left and right endpoint Riemann sums will give approximate result of the area under $f(x)=x^2$ and it can be compared with the result of integral of the same function in the interval given.

So, $(A_R+A_L)/2 = (1.75+3.75)/2=2.25$

$\int^2_0x^2dx=x^3/3|^2_0=8/3=2.67$

Result are close but not same, since one is approximate and one is exact; however, by increasing sample rates (subintervals), closer result to the exact value can be found.

3 0

3 years ago

Find a. Round to the nearest tenth

Drupady [299]

Answer:

a = 2.14cm to the nearest 10th =2.1

Step-by-step explanation:

your welcome :)

8 0

3 years ago

Question 12 1 pts If the population of a country is reported in the year 1990 as 471.56 million and in the year 2000 as 492.53 m

I am Lyosha [343]

Answer:

526.39 million

Step-by-step explanation:

The exponential equation can be written as ...

p(t) = 471.56(492.53/471.56)^(t/10)

Then p(25) ≈ 525.75 . . . . million

The closest answer choice is 526.39 million.

<em>Comment on the answer choice</em>

Reverse-engineering the answer, we find it was computed using the exponential equation ...

p(t) = 471.56e^(0.0044t)

p(25) = 471.56·1.116278 ≈ 526.39

The k factor in the exponent is <em>inappropriately rounded</em> from 0.004350903. You cannot use a 2-significant-figure constant to arrive at an accurate 5-significant-figure answer.

3 0

3 years ago

Use the data in the table to complete the sentence.

Salsk061 [2.6K]

Chugjjjzjjsjdjjdhdhsbsjksksbsbsbsjdjskksjdkdd

4 0

2 years ago

Read 2 more answers