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IceJOKER [234]
2 years ago
15

A school principal is trying to collect data about how often students earn detention. To do so, she gives a 7-question survey du

ring detention one afternoon. Which of the following is likely to cause bias in the data?
A.The survey is conducted in the afternoon
B.The survey is only conducted on one day
C.The survey is only given to scholars who earned detention
D.The survey did not have enough questions
Mathematics
1 answer:
ExtremeBDS [4]2 years ago
3 0

Answer:

B

Step-by-step explanation:

I think B is right because it's only on one day so that one day could have way more kids than usual or way less.

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agasfer [191]

Applying the given probabilities, it is found that there is a 0.42 = 42% probability of watching a movie today.

These following <em>probabilities </em>involve a movie being watched today:

  • 0.5 of 0.6(if it rains today).
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Hence, adding them:

p = 0.5(0.6) + 0.3(0.4) = 0.3 + 0.12 = 0.42

0.42 = 42% probability of watching a movie today.

A similar problem is given at brainly.com/question/14398287

5 0
2 years ago
A triangle is placed in a semicircle with a radius of 7mm , as shown below. Find the area of the shaded region. Use the value 3.
timurjin [86]
We either need to see a picture of this and/or get more information about the measurements of the triangle. In general, the area outside of the triangle will be the area of the semi-circle minus the area of the triangle itself, or: 1/2*49*3.14 - 1/2 b*h of the triangle. That first part, which is the area of the semi-circle, works out to 76.93 So based on the info we have, it becomes 76.93 - 1/2*b*h of the triangle = area outside of triangle. 
8 0
3 years ago
Which of the following measurements is least precise, and how many significant digits does it
gtnhenbr [62]

Answer:

50.25 cm trust me

Step-by-step explanation:

5.25 cm

7 0
2 years ago
[2x(3+5)+6]x4 what is the value of this expression
Gekata [30.6K]

Answer:

16x5+6x4

Step-by-step explanation:

(2x(3+5)+6)(x4)

=(2x(3+5)+6)(x4)

=(2x(3+5))(x4)+(6)(x4)

=16x5+6x4

5 0
3 years ago
Read 2 more answers
Meliza wanted to do some shopping on iTunes. She bought one movie for $6.99 and then by 10 songs. Releases total iPhones cost wa
a_sh-v [17]

Answer:

1.5 for each song.

Step-by-step explanation:

subtract $6.99 by $21.99 = 15 divided by 10 = 1.5

4 0
3 years ago
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