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Ray Of Light [21]
2 years ago
9

A large school district is considering moving up the start date for the school year by two weeks. In order to determine if famil

ies would support this, surveys were mailed out to 1000 parents/guardians in the district. The survey said, "We believe that starting school two weeks earlier will be beneficial to the students in our District. Would you support moving up the start date for the school year by two weeks?" The School Board received 492 responses from the survey, 72% of which supported the proposal. -Describe a potential source of bias in the wording of the question. -Due to the bias described in part (a), is the sample proportion of 72% likely greater than or less than the actual proportion of families who support the proposal? Explain. -What type of sample was taken? -Less than half of those sent the letter returned a response. What type of bias is this?
Mathematics
1 answer:
Anvisha [2.4K]2 years ago
5 0

Answer:

(a) Confirmation bias

(b) Likely less than actual proportion of families who support the proposal

(c) Random sample

(d) Nonresponse bias

Step-by-step explanation:

In confirmation bias, the researcher already has and intends to prove an assumption about the effect the of a treatment before carrying out the survey, such that the survey or research is tries to dictate to the participants in the survey about the desired outcome

In the question, the belief of the researcher is expressed to the participants in a form of brief at the start of the survey which is attempting to influence the responses to the survey, such that the actual result should be less than what was observed.

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Janine can use up to 150 one-inch blocks to build a solid, cube-shaped model. What are the dimensions of the possible models tha
klio [65]

Answer:

A total of 12 dimensions to make perfect cubes. 1x1, 2x2, 3x3, 4x4, 5x5, 6x6, 7x7, 8x8, 9x9, 10x10, 11x11, 12x12. Can i get a brainliest?

Step-by-step explanation:

1x1=1

2x2=4

3x3=9

4x4=16

5x5=25

6x6=36

7x7=49

8x8=64

9x9=81

10x10=100

11x11=121

12x12=144

8 0
2 years ago
Read 2 more answers
From an industrial area 70 companies were selected at random and 45 of them were panning for expansion next year. Find 95% confi
Lana71 [14]

Answer:

Confidence limit = [52.8%, 75.2%]

Step-by-step explanation:

P=\frac{45}{70}= 0.64

(1-P)=1-0.64=0.36

n= 70

P ± z \sqrt{\frac{P(1-P)}{n} }

where the value z will be taken from the z-table for 95% confidence interval

1-0.95= 0.05/2= 0.025

0.95+0.025= 0.0975

From the z-table the value of z corresponding to 0.0975 is 1.96

0.64 ± 1.96 \sqrt{\frac{0.64*0.36}{70} }

0.64 ± 1.96 (0.057)

0.64 ± 0.112

64%% ± 11.2%

so the confidence interval is

64+11.2=75.2%

64-11.2=52.8%

[52.8, 75.2]

8 0
2 years ago
A local PTA runs a fundraiser, selling lottery tickets for $5, offering 1 first prize of $100 and 5 second prizes worth $20 each
podryga [215]
100 tickets were sold.
The total amount of the tickets sold is = 5 * 100 = $500. 
First prize given = $100
Second prize worth = $20 * 5 = $100
Total worth of prize + $100 + $100 = $200.
Net amount of tickets sold = $500 - $200 = $300
Expected price of each ticket sold = $300/100 = 3.
Therefore, the real price of each ticket sold is $3.
6 0
2 years ago
A line passes through points (0, k) and (4.0) and has a slope of -2.5. Which statements are true regarding the graph of the line
Oksi-84 [34.3K]

Answer:

it the third one is the answer

5 0
2 years ago
Aisha is playing a game in which she can gain or lose points on each turn. The table below
Varvara68 [4.7K]

Answer:

A score of -16 represents the <u>lowest</u> of points for these four turns.

The number for Aisha's highest score will be <u>turn 2</u> on the number line.

That number is <u>10</u>.  

Step-by-step explanation:

Since the options of the drop down menu are not included, you should choose any option similar to lowest.

Aisha's highest score was obtained in turn 2 and that is 10.

Aisha is comparing absolute terms, that is why she believes that -16 represents a good score, while in reality is the worst she got.

7 0
2 years ago
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