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Alex
3 years ago
13

A survey concluded that 60% of cars going through the Lomonosov street encounters traffic jam. After installing a new traffic li

ghts, a random sample of 2500 cars was found to contain 1462 cars encountered traffic jam. Have the new installed traffic lights had any effect? State your conclusion with 0.05 level of significance
Mathematics
2 answers:
Mkey [24]3 years ago
6 0

Yes, the new traffic lights have had an effect, as only 58.48% of surveyed cars had encountered a traffic jam, compared to 60% before the installation of the traffic lights.

erastovalidia [21]3 years ago
3 0

Answer:

Close encounters. AI can help city officials manage traffic by counting how many moving vehicles travel down a road and identifying close encounters between vehicles and pedestrians. Courtesy TACC.

Step-by-step explanation:

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I need help with this question please
ludmilkaskok [199]

Answer:

  62

Step-by-step explanation:

The enclosing rectangle is 24 units long and 12 units high. Its area is ...

  (24 units)(12 units) = 288 square units

The white circles obviously cover more than half the area, so the only viable answer choice is 62.

__

If you want to go to the trouble to actually figure it out, you can find the area of each circle using the area formula ...

  A = πr² = (3.14)(6²) = 113.04

Then both circles have an area of 2×113.04 = 226.08, and the shaded area is the difference between that and the rectangle area:

  shaded area = 288 -226.08 = 61.92 ≈ 62

5 0
3 years ago
In a taste test people were asked which of 4 soft drinks they liked best. of those surveyed 1/3 chose orange crush 2/5 chose kil
motikmotik
1/3 = 10/30
2/5 = 12/30
1/6 = 5/30
sum of all of them = 27/30
the fraction that chose the lime sublime is 1/10
7 0
3 years ago
What is the unit price for 12 apples for $3.12?
Zigmanuir [339]

Answer:

The answer would have came out of 3.84615384615

Then round up the answer to 3.85.  So the unit price is $3.85

7 0
3 years ago
Read 2 more answers
If x=3 what is the value of y in this equation?
inn [45]

Answer:

\displaystyle \large{y=36}

Step-by-step explanation:

We are given the equation \displaystyle \large{y=12x}. To find y-value when or at x = 3, simply substitute x = 3 in which gives us \displaystyle \large{y=12(3)} then evaluate the value as we obtain the y-value or final answer to the question:

\displaystyle \large{\boxed{y=36}}

If you have any questions about this question or for clarification, do not hesitate to ask in comment!

6 0
3 years ago
Read 2 more answers
HELP PLZZZZZ ASAP
Deffense [45]

Answer: $22.50

Step-by-step explanation:

25% of 30 = 7.5

30 - 7.5 = 22.50

5 0
3 years ago
Read 2 more answers
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