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DedPeter [7]
3 years ago
15

the relative frequency that the traffic lights will show RED at road works is 0.2. Estimate how many times they will show RED ov

er the next 40 journeys.
Mathematics
2 answers:
tensa zangetsu [6.8K]3 years ago
8 0
Only 8 times because you take .2 times 40

adell [148]3 years ago
7 0
Yes you multiply 40*0.2 and that would be 8.
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I’m failing pls help I’ll brainlest ASAP
GuDViN [60]
-2,-1
step by step explanation: i counted the numbers and got the answer
7 0
2 years ago
population mean =72 and standard deviation =10, what is standard error of distribution of sample means for n=4 and n=25
mixer [17]

Answer:

<u>The standard error of distribution for n = 4 is 5 and for n = 25 is 2.</u>

Step-by-step explanation:

1. Let's review the information given to us for solving the question:

Population mean = 72

Standard deviation  =  10

Sample₁ = 4

Sample₂ = 25

2. For finding the standard error of the mean, we use the following formula:

Standard error = Standard deviation / √Size of the sample

Standard error for Sample₁ = 10/√4

<u>Standard error for Sample₁ = 10/2 = 5</u>

Now, let's find the standard error for Sample₂

Standard error for Sample₂ = 10/√25

<u>Standard error for Sample₂ = 10/5 = 2</u>

4 0
3 years ago
3. A Fahrenheit thermometer reads 63°F. If the temperature increases 10°F, to the nearest degree, what is the new temperature C,
Umnica [9.8K]

Formula to convert F to C:

(F -32) x 5/9

F = 63 + 10 = 73

73-32 = 41

41 x 5/9 = 22.77777

Rounded to the nearest degree = 23 C

8 0
3 years ago
Read 2 more answers
A high school athlete ran the 100 meter sprint in 13.245 seconds. what is the time rounded to the nearest tenth. Award is brainl
monitta
If you round 13.245 seconds to the nearest tenth, the answer is 13.2 seconds.
Hope this helped!
6 0
3 years ago
Read 2 more answers
(-1, -5)<br><br><br> (-2, -4)<br><br><br> (-5,-1)<br><br><br> (-4, -2)
notka56 [123]

Answer:

  (-4, -2)

Step-by-step explanation:

  A = (-1, 2)

Add (-3, -4) to that and you get ...

  A' = (-1-3, 2-4) = (-4, -2) . . . . matches the last choice

__

The translation function has the effect of moving the point left 3 and down 4. You can count grid squares on the graph to see that A' ends up at (-4, -2).

8 0
3 years ago
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