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o-na [289]
3 years ago
5

Sample survey questions are usually read from a computer screen. In a computer-aided personal interview (CAPI), the interviewer

reads the questions and enters the responses. In a computer-aided self interview (CASI), the interviewer stands aside and the respondent reads the questions and enters responses. One method almost always shows a higher percent of subjects admitting use of illegal drugs. Which method
Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
6 0

Answer:

CASI

Step-by-step explanation:

In Statistics, sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.

Sample survey questions are usually read from a computer screen. In a computer-aided personal interview (CAPI), the interviewer reads the questions and enters the responses. In a computer-aided self interview (CASI), the interviewer stands aside and the respondent reads the questions and enters responses. One method almost always shows a higher percent of subjects admitting use of illegal drugs.

This is because they get to interact with a computer rather than a human interviewer.

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After a rotation of 90° about the origin, the coordinates of the vertices of the image of a triangle are A'(6,3), B'(-2, 1)
topjm [15]

Rotation 90° counterclockwise about the origin

The coordinates of the pre-image are A (3 , -6) , B (1 , 2) , C (7 , -1)

Rotation 90° clockwise about the origin

The coordinates of the pre-image are A (-3 , 6) , B (-1 , -2) , C (-7 , 1)

Step-by-step explanation:

Let us revise the rotation

1. If point (x , y) rotated about the origin by angle 90° counter-clockwise

  then its image is (-y , x)

2. If point (x , y) rotated about the origin by angle 90° clock wise

   then Its image is (y , -x)

The given is:

After a rotation of 90° about the origin, the coordinates of the vertices

of the image of a triangle are A' (6 , 3), B' (-2 , 1)  and C' (1 , 7)

We need to find the coordinates of the pre-image

There is no mention about the rotation counterclockwise or clockwise,

then we will do both

∵ The rotation is 90° counterclockwise about the origin

∵ Point A (x , y) and its image A' (-y , x)

∵ A' = (6 , 3)

∴ -y = 6 and x = 3

∵ -y = 6 ⇒ multiply both sides by -1

∴ y = -6

∴ Point A is (3 , -6)

∵ Point B (x , y) and its image B' (-y , x)

∵ B' = (-2 , 1)

∴ -y = -2 and x = 1

∵ -y = -2 ⇒ multiply both sides by -1

∴ y = 2

∴ Point B is (1 , 2)

∵ Point C (x , y) and its image C' (-y , x)

∵ C' = (1 , 7)

∴ -y = 1 and x = 7

∵ -y = 1 ⇒ multiply both sides by -1

∴ y = -1

∴ Point C is (7 , -1)

The coordinates of the pre-image are A (3 , -6) , B (1 , 2) , C (7 , -1)

∵ The rotation is 90° clockwise about the origin

∵ Point A (x , y) and its image A' (y , -x)

∵ A' = (6 , 3)

∴ y = 6 and -x = 3

∵ -x = 3 ⇒ multiply both sides by -1

∴ x = -3

∴ Point A is (-3 , 6)

∵ Point B (x , y) and its image B' (y , -x)

∵ B' = (-2 , 1)

∴ y = -2 and -x = 1

∵ -x = 1 ⇒ multiply both sides by -1

∴ x = -1

∴ Point B is (-1 , -2)

∵ Point C (x , y) and its image C' (y , -x)

∵ C' = (1 , 7)

∴ y = 1 and -x = 7

∵ -x = 7 ⇒ multiply both sides by -1

∴ x = -7

∴ Point C is (-7 , 1)

The coordinates of the pre-image are A (-3 , 6) , B (-1 , -2) , C (-7 , 1)

Learn more:

You can learn more about rotation in brainly.com/question/3779181

#LearnwithBrainly

3 0
4 years ago
Shaila bought 30 t-shirts at a clothing store. 20% of the t-shirts were blue and ½ of the shirts were black. How many of the t-s
abruzzese [7]

Answer:

9 shirts

Step-by-step explanation:

20% of the shirts were blue

20% of 30 is 6

6 shirts were blue

1/2 of the shirts were black

1/2 = 50%

50% of 30 is 15

15 shirts are black

15 + 6 = 21

30 - 21 = 9

(or you could add the percentages to get 70%, and get 30%. 30% of 30 is 9.)

Hope this helps!

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3 years ago
What is the square root of 72/25x4
Afina-wow [57]

Answer:

1.35764501988

Step-by-step explanation:

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3 years ago
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Find the circumference of the circle to the nearest tenth.<br> C<br> 6 cm
Yuri [45]

I assume the radius is 6 cm.

Diameter = 2 times the radius.

D = 12 cm.

We now use C = pi•D.

C = pi•12cm

C = 12pi cm

Done!

8 0
3 years ago
How can an insurance company make a profit by taking in premiums and making payouts? The value of the premiums the company takes
yarga [219]

Alot of the time insurence companies get discounts with whomever is fixing the item or person. For example- for medical insurence alot of the major insurence companies have agreements with drug companies in order to lower the payment for the company.

Another thing is they pick people who are unlikly to call and disput a claim or have problems in general.

7 0
3 years ago
Read 2 more answers
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