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RoseWind [281]
3 years ago
12

The head librarian at a public library releases a report. The report states that visitors to the library want the library to ope

n one hour earlier on Saturdays. The report was based on a survey of the first 50 visitors to the library on a recent Saturday. Participants were asked the question, "Do you think the library should open one hour earlier on Saturdays?"
Select ALL statements that correctly evaluate the report.

Mathematics
1 answer:
pogonyaev3 years ago
5 0

Answer:

Step-by-step explanation:

The question is not biased.  It doesn't push the participants to answer one way or another.

However, the sample is biased.  It does not represent the population.

The first and fourth options are correct.

You might be interested in
Suppose that 1/2 of all cars sold at a Nissan dealer in a given year are Altimas, 1/3 are Maximas, and the rest are Sentras. Sup
IRINA_888 [86]

Answer:

(1) Not conditional, 5/8

(2) Not conditional, 1/12

(3) Conditional, 1/18

Step-by-step explanation:

Fraction of cars sold

Altima = 1/2

Maxima = 1/3

Sentra = 1 - (1/2 + 1/3) = 1 - 5/6 = (6 - 5)/6 = 1/6

Fraction of cars sold with moon roof

Altima = 3/4 × 1/2 = 3/8

Maxima = 1/2 × 1/3 = 1/6

Sentra = 1/2 × 1/6 = 1/12

(1) Probability (a randomly selected car has a moon roof) = 3/8 + 1/6 + 1/12 = (9+4+2)/24 = 15/24 = 5/8

(2) Probability (a randomly selected car has a moon roof given it is Sentra) = 1/12

(3) Probability (a randomly selected car is a Maxima if it has a moon roof) = 1/3 × 1/6 = 1/18

A conditional probability uses if (as a condition) in making statements or asking questions

An unconditional probability makes statement or ask question without the use of condition (if)

5 0
2 years ago
Does - 3/4 + 3/5 have a positive, negative or zero sum?
ryzh [129]

are you looking for the answer??

4 0
3 years ago
Read 2 more answers
The average age of 6 men is 35 years and
PSYCHO15rus [73]

Answer:

39.50

42.50

Step-by-step explanation:

Age of the 2 men = sum of the ages of the 6 men - sum of the ages of the 4 men

Average = sum of ages / total number of men

35 = sum of ages / 6

sum of ages = 35 x6 = 210

32 = sum of ages / 4

32 x 4 = sum of ages

128

210 - 128 = 82

age of the younger man = x

age of the older man = 3 + x

x + 3 + x = 82

2x + 3 = 82

2x = 82 - 3

2x = 79

x = 79/2 = 39.5

older man = 39.5 + 3 = 42.50

7 0
2 years ago
Please help i will give brainliest but answer all!!
zloy xaker [14]

Answer:

19. reflection (-1, -3)

20. translation (5, -3)

21. translation (0, -5)

22. reflection (1, 3)

23. translation (5, 6)

24. reflection (1, 3)

Step-by-step explanation:

4 0
2 years ago
You use 4 gallons of water on 30 plants. At that rate how much water will you need for 45 plants?
Alja [10]
You would use 6 gallons of water to water 45 plants 
4=30  
\frac{45}{30}=\frac{3}{2}
\frac{3}{2}of 4 gallons = 6 gallons
8 0
3 years ago
Read 2 more answers
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