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Lubov Fominskaja [6]
3 years ago
6

find the variance and standard deviation of the given set of data to the nearest tenth. 440,130,280,500,150,640,760

Mathematics
1 answer:
Westkost [7]3 years ago
8 0

Answer:

The variance is 49595.9

The standard deviation is 222.7

Step-by-step explanation:

The step -by -step explanation is shown in the picture above.

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eive 19. The school cafeteria uses 48 cans of peaches per day. How many cans of peaches will they use in 19 days? help​
Simora [160]

Answer:

912

Step-by-step explanation:

All that needs to be done is multiply both numbers they give you.

48 x 19= 912

3 0
2 years ago
In the following figure, the square ABCD is inscribed in the circle centered at point P. What is the area of the circle?
Ainat [17]

Answer:

A_{Circle} \approx 39.24\: units^2

Step-by-step explanation:

Square ABCD is inscribed in a circle with center P such that BC = 5 units.

BD will be diagonal of the square as well as diameter of the circle.

BD = BC\times\sqrt 2

\implies BD = 5\sqrt 2

-> Diameter of the circle (d) = 5\sqrt 2

-> Radius of the circle (r) = 2.5\sqrt 2=3.535\: units

A_{Circle} =\pi(r)^2

\implies A_{Circle} =3.14(3.535)^2

\implies A_{Circle} =3.14(3.535)^2

\implies A_{Circle} =39.2381465

\implies A_{Circle} \approx 39.24\: units^2

8 0
2 years ago
Suppose a population has a mean of 7 for some characteristic of interest and a standard deviation of 9.6. A sample is drawn from
valkas [14]

Answer:  A. 1.2

Step-by-step explanation:

Given : Sample size : n= 64

Standard deviation: \sigma=9.6

The formula to find the standard error of mean is given by :-

S.E.=\dfrac{\sigma}{\sqrt{n}}\\\\\Rightarrow\ S.E.=\dfrac{9.6}{\sqrt{64}}\\\\\Rightarrow\ S.E.=\dfrac{9.6}{8}=1.2

Therefore, the standard error of the​ mean= 1.2

Hence, A is the right option.

7 0
3 years ago
A recipe that serves 8 people requires 1 and one fourth cups of sugar. Using this​ recipe, how many cups of sugar are needed to
docker41 [41]

Answer:

3 1/8 or 3.125.

Step-by-step explanation:

First you would change 1 1/4 to 5/4. Then you would make a proportion of 5/4 or I like to use decimals, 1.25, over 8. Your proportion would look like: 1.25/8 = x/20. Then cross multiply 1.25 and 20 then divide your product by 8. Your final answer is 3.125 or 3 1/8. Hope this helps!

4 0
3 years ago
During the final 5 seconds of a race a cyclist increased her velocity from 4 m/s to 7 m/s . What was her average acceleration du
GREYUIT [131]

Answer:

The average acceleration of the cyclist was 0.6 m/s².

Step-by-step explanation:

Acceleration:

The rate change of velocity per unit time is call the acceleration of the object.

a=\frac{v-u}t

u= initial velocity

v= final velocity

t= time taken change of velocity.

During the final 5 seconds of a race cyclist increased her velocity from 4m/s to 7 m/s

Here v= 7 m/s and u=4 m/s t=5 seconds

\therefore a=\frac{7\ m/s-4 \ m/s}{5s}

     =\frac{3}{5} \ m/s^2

     =0.6 m/s²

The average acceleration of the cyclist was 0.6 m/s².

8 0
3 years ago
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