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DENIUS [597]
3 years ago
8

A sample of 100 footballs showed an average air pressure of 13 psi. The standard deviation of the population is known to be .25

psi. What is the standard error of the mean?
Mathematics
1 answer:
Vladimir79 [104]3 years ago
7 0

Answer:

0.025 is the standard error of mean.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 100

Sample mean = 13 psi

Population standard deviation = 0.25 psi

We have to find the standard error of the mean.

Formula:

Standard error =

\dfrac{\sigma}{\sqrt{n}} = \dfrac{0.25}{\sqrt{100}} = \dfrac{0.25}{10} = 0.025

0.025 is the standard error of mean.

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What numbers are perfect numbers
alekssr [168]
A perfect number is a number where the sum of its divisors is equal to the number.

For example 6: 1 + 2 + 3 = 6

Another example is 28: 1 + 2 + 4 + 7 + 14 = 28

Here is a short list of perfect numbers: 6, 28, 496, 8128, <span>33550336, and the numbers get way bigger as we go on.</span>

5 0
3 years ago
An animal shelter has 44 dogs and 54 cats. Then, 13 of these animals get placed in
Alex_Xolod [135]

Answer:

44+54= 98

98-13=85

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
The graph shows which equation?
liraira [26]

Answer:

First option / a - y = 2x - 2

Step-by-step explanation:

    We can tell it'll either be the first one or the second one as the line intercepts the y-axis at -2, so the b will be -2.

    The line goes up 2 and over 1, so the slope will be 2. Putting all the pieces together gives us the first option of y = 2x - 2.

4 0
2 years ago
Write the slope-intercept form of the equation that passes through the point (4,-6) and is parallel to the line y = -3/4x - 5
Karolina [17]

The equation that runs through the location (4,-6) has the slope-intercept form,  y=-\frac{3}{4}x-3 .

<h2>Formation of the equation</h2>

A line's equation written in the slope-intercept form:

y=mx+b

where m= slope & b= y-intercept

The slope of two parallel lines is equal.

Currently, we know the line's equation:

y=-\frac{3}{4} x-5

here, slope, m= -\frac{3}{4}

A line equation is created by adding the slope's value and the point's coordinates (4, -6):

-6=-\frac{3}{4}(4)+b

⇒ -6=-3 +b [adding 3 to both sides]

⇒-3=b

⇒b= -3

Hence the solution is  y=-\frac{3}{4}x-3 .

Learn more about slope-intercept form here:

brainly.com/question/9682526

#SPJ4

5 0
1 year ago
(5x-2)^2 help asap pleaseee
omeli [17]

Answer:

25x² − 20x + 4

Explanation:

(5x − 2)²

= (5x + −2)(5x + −2)

= (5x)(5x) + (5x)(−2) + (−2)(5x) + (−2)(−2)

= 25x² − 10x − 10x + 4

= 25x² − 20x + 4

5 0
3 years ago
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