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3 years ago

The variance of a stock's returns can be calculated as the:

Mathematics

1 answer:

Tamiku [17]3 years ago

4 0

Answer:

The correct option is b.

Step-by-step explanation:

The formula for standard deviation is

$\sigma^2=\frac{\sum {(x-\overline{x})^2}}{n}$

where, $\overline{x}$ is mean of the data and n is number of observation.

The variance of a stock's returns can be calculated by the above formula.

Variance of stock's returns is the average value of squared deviations from the mean.

Therefore the correct option is b.

You might be interested in

Find 8.5 times the difference between 77 and 13

Anton [14]

Answer:

544

Step-by-step explanation:

The statement 8.5 times the difference between 77 and 13 can be expressed mathematically as 8.5×(77-13)

According to BODMAS, we will deal with the expression in the bracket first to have;

8.5×64

Then we the product of the resulting expression.

8.5×64

= 544

The answer is 544

4 0

3 years ago

One of the authors came across an article (USA Today, 2008) that said that on average Americans have visited 16 states in the Un

Daniel [21]

Answer:

1. a. Students

2. d. number of U.S. states visited, quantitative

3. a. H o: mu = 16, Ha: mu ≠ 16

4. (7.46,11.50)

Step-by-step explanation:

1. The researcher is interested in finding out the average number of states in US that the students have visited.

The unit that is being observed to arrive at that conclusion is the Students. The observational unit for this study is a. Students.

2. The variable of interest from the information above is the number of U.S. states visited. The observations recorded for this variable are in numbers which are numeric in nature. This implies that the variable is quantitative in nature.

Therefore, the answe is d. number of U.S. states visited, quantitative

3. To test whether the average number of states all students at the author’s school have visited,

The null hypothesis (H o) is always given as the negation statement/null of what we wish to test.

So, we wish to test that the average is different from 16. Therefore, the null would be that the average is 16.

Answer is a. H o: mu = 16, Ha: mu ≠ 16

4. A 95% confidence interval for the average number of states all students at the author’s school have visited can be calculated using the formula:

x bar + or - 2 √s/n

=9.48 + or - 2 × 7.13/ √50

= (7.46,11.50)

The 95% confidence interval for the average number of states all students at the author’s school have visited is (7.46,11.50). The average falls betw 7.64 and 11.50.

7 0

3 years ago

Please help me i really need help please

Vanyuwa [196]

Answer:

7: 100

8: 40

9: 74

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

How many solutions does the following equation have? ln(x2 + 4x − 5) = 0

lisov135 [29]

Alrighty
remember
$log_a(b)=c$ means $a^c=b$
and
$ln(x)=log_e(x)$
and
$x^0=1$ for all real values of x
so

$ln(x^2+4x-5)=0$ means
$log_e(x^2+4x-5)=0$ means
$e^0=x^2+4x-5$ which simplifies to
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square
$x=-2+\sqrt{10}$ and $x=-2-\sqrt{10}$
2 solutions

7 0

3 years ago

1.) Write the slope-intercept form of the equation for the line.

Vinvika [58]

Answer:

Step-by-step explanation:

4 0

3 years ago