All categories

2 years ago

How to calculate sample size with standard deviation

Mathematics

1 answer:

VLD [36.1K]2 years ago

8 0

Answer:

Step 1: Calculate the mean of the data—this is \muμmu in the formula.

Step 2: Subtract the mean from each data point. These differences are called deviations. Data points below the mean will have negative deviations, and data points above the mean will have positive deviations.

Step 3: Square each deviation to make it positive.

Step 4: Add the squared deviations together.

Step 5: Divide the sum by the number of data points in the population. The result is called the variance.

Step 6: Take the square root of the variance to get the standard deviation

You might be interested in

James estimated the total cost of groceries to be $50. The actual cost of the groceries is $65. What is the percent error? Round

Yuki888 [10]

The percentage error is 23%

Explanation:

The estimated total cost of the groceries = $50

The actual cost of the groceries = $65

To find the error value, we need to subtract the value of actual cost and total cost of the groceries.

Thus,

error value = actual cost - total cost

error value $= 65-50=15$

Hence, error value = $15

The formula to determine the percent error is given by

$Percent error $=\left(\frac{\text { error value}}{\text {actual value}}\right) \times 100$$

Substituting the values in the formula, we get,

$\begin{aligned} \text { Percent error } &=\left(\frac{15}{65}\right) \times 100 \\ &=0.231 \times 100 \\ &=23.1 \end{aligned}$

Rounding off the value, we have, 23%

Thus, the percentage error is 23%

6 0

3 years ago

Jackson hate about 8,351 calories worth of food in a week. About how many calories worth of food does he eat every day?

lawyer [7]

Answer:1193 calories

Step-by-step explanation:

First you divide 8351 by 7 since there are 7 days in a week. You get 1193

3 0

4 years ago

Which expression is equivalent to −16y+13 ?

iragen [17]

Answer:

Step-by-step explanation:

13-16y is the same as -16y+13.

7 0

3 years ago

Read 2 more answers

What is the answer to this? 15 - 4(3) =

Crank

Answer:

Hello!! The answer is 3

Step-by-step explanation:

15 - 4(3)

15 - 12

5 0

3 years ago

Read 2 more answers

Can anyone help me with this? complete the table of values of f(x) = 3×

n200080 [17]

Answer:

See sample table below.

Step-by-step explanation:

The function is given as :

f(x) = 3ˣ

A table of values can be formed as ;

x calculations f(x)

-4 3⁻⁴ 0.0123

-3 3⁻³ 0.0370

-2 3⁻² 0.1111

-1 3⁻¹ 0.3333

0 3⁰ 1.000

1 3¹ 3.000

2 3² 9.000

3 3³ 27.00

4 3⁴ 81.00

8 0

3 years ago