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kolbaska11 [484]
3 years ago
9

(Please Help) A small city conducts a survey to determine how its residents feel about building a public pool facility. Research

ers go door-to-door one day from 9:00 a.m. to 5:00 p.m. to ask if the adult resident would like to complete the survey. What kind of sampling technique is being used? Against which group would the survey most likely be biased?
A. Systematic sampling; the sample would be biased against adults who are unemployed.
B. Volunteer sampling; the sample would be biased towards those who complete the survey.
C. Simple random sampling; the sample would be unbiased.
D. Convenience sampling; the sample would be biased against adults who work during the day.
Mathematics
2 answers:
alekssr [168]3 years ago
5 0

Answer:

D- convenience sampling, the sample would be biased against adults who work during the day

Step-by-step explanation:


sergejj [24]3 years ago
4 0

Answer:

D. Convenience sampling; the sample would be biased against adults who work during the day.

Step-by-step explanation:

Many adults work a typical 9-5 job, therefore if the survey goes on during their full shift, none of them will get to answer. Most people who answer the survey will either be unemployed, or work at night, and no adult with a day job will get to voice their opinion.

please mark brainliest

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11 Willie and two of his friends earn money mowing lawns in their neighborhood. On
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Answer:

C

Step-by-step explanation:

8 0
3 years ago
The lengths of brook trout caught in a certain Colorado stream are normally distributed with a mean of 14 inches and a standard
mezya [45]

Answer:

0.6563 or 65.63% of brook trout caught will be between 12 and 18 inches

Step-by-step explanation:

Mean trout length (μ) = 14 inches

Standard deviation (σ) = 3 inches

The z-score for any given trout length 'X' is defined as:  

z=\frac{X-\mu}{\sigma}  e interval

For a length of X =12 inches:

z=\frac{12-14}{3}\\z=-0.6667

According to a z-score table, a score of -0.6667 is equivalent to the 25.25th percentile of the distribution.

For a length of X =18 inches:

z=\frac{18-14}{3}\\z=1.333

According to a z-score table, a score of 1.333 is equivalent to the 90.88th percentile of the distribution.

The proportion of trout caught between 12 and 18 inches, assuming a normal distribution, is the interval between the equivalent percentile of each length:

P(12\leq X\leq 18) = 90.88\% - 25.25\%\\P(12\leq X\leq 18) = 65.63\%

8 0
3 years ago
Estelle is raking leaves in her yard. After 1 hour, she has 2 bags of leaves. After 3 hours, she has 6 bags of leaves. Which gra
denis-greek [22]
The graph with the line going through (0,0) with a slope of 2. This is because for every 1 hour, she has 2 bags of leaves.
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7 0
3 years ago
Classify the triangle if two angles in the triangle measure 40 and 50°.​
vaieri [72.5K]

Answer:

Right Triangle

Step-by-step explanation:

Let's find the missing angle:

180 - (40 + 50)

180 - 90 = 90°

So we have a right triangle!

6 0
3 years ago
Read 2 more answers
Noah says to find 20% of a number he divides the number by 5. Is this true explain your answer
Nutka1998 [239]

Answer:

yes

Step-by-step explanation:

note that 20% = \frac{20}{100} = \frac{1}{5}

Hence to find 20% of a number, dividing the number by 5 is correct

20% of £30 = \frac{30}{5} = £6


5 0
3 years ago
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