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Kamila [148]
3 years ago
8

Why is the standard deviation used more frequently than the? variance? choose the correct answer below.

Mathematics
2 answers:
Kay [80]3 years ago
8 0
I think the correct answer would be A. The standard deviation is used than the variance because the units of variance are squared units. It does not say anything or is meaningless while standard deviation has the same units as the mean which is a measure of central tendency.
Lina20 [59]3 years ago
6 0

Answer:

Option A

Step-by-step explanation:

Given are 3 options to check why standard deviation is more used than variance.

Variance is the average of square of deviations from the mean.

Std deviation is frequently used because for normal distribution std deviations give a measure about probability.

Hence option a is right.

a. the units of variance are squared. its units are meaningless

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A 2.5​ ft wide circular track for a camera dolly is set up for a movie scene. The two rails of the track form concentric circles
Deffense [45]

Answer:

15.71 ft

Step-by-step explanation:

Given that:

width of the circular track = 2.5ft

Suppose the radius of the inner circle is 57 ft since it is not given

Then the radius of the outer circle = (2.5 + 57) ft = 59.5 ft

The circumference of a circle = 2πr

For inner circle now, the circumference = 2 × π × 57 ft

For inner circle now, the circumference = 358.14 ft

For the outer circle, the circumference = 2 × π × 59.5 ft

For the outer circle, the circumference = 373.85 ft

The difference between the circumference of the outer wheel from the inner wheel shows how farther does a wheel on the outer rail travel than a wheel on the inner rail of the track in one​ turn

∴

= ( 373.85 - 358.14 ) ft

= 15.71 ft

6 0
3 years ago
1. a. Is 3.2 - 5.7 positive, negative, or<br> zero?<br> (A. negative<br> B. zero<br> C. positive
swat32
3.2-5.7=-2.5 so its have to be a negative because a smaller number subtract a bigger number have to be equal to a negative number.
4 0
4 years ago
Read 2 more answers
I’m january , wallys’s widget had sales of 12,500 and expenses of 10,200 the profit for january was ?
Fofino [41]

Answer:

$2,300

Step-by-step explanation:

The basic formula for profit is: profit = sales - expenses

Therefore 12,500 - 10,200 = $2,300

I hope this helps!

7 0
3 years ago
Calculate the ratio of ab to ac and the ratio of ad to dc . round your answers to the hundredths place. what do you notice about
yanalaym [24]

The ratio of AB to AC and the ratio of AD to DC is 1 : 2 each respectively. They are equivalent ratios.

<h3>Ratios and proportions</h3><h3 />

A ratio means a comparison of two different quantities while proportion is an equality of two ratios.

  • AB = 5 in
  • AC = 10 in
  • AD = 4 in
  • DC = 8 in

Ratio of AB to AC = 5 in : 10 in

= 5 / 10

= 1 / 2

= 1 : 2

Ratio of AD to DC = 4 in : 8 in

= 4 / 8

= 1 / 2

= 1 : 2

Therefore, the ratio of AB to AC and the ratio of AD to DC is 1 : 2 each respectively. They are equivalent ratios.

Learn more about ratios and proportions:

brainly.com/question/12024093

#SPJ4

3 0
1 year ago
REWARDING BRAINLY FOR CORRECT ANSWER
Ivanshal [37]

Answer:

The range is 10

Step-by-step explanation:

since it starts at 0 and goes till 9 thats 10 data points

7 0
3 years ago
Read 2 more answers
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