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wariber [46]
2 years ago
8

Hhhhhiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Mathematics
2 answers:
OverLord2011 [107]2 years ago
8 0
Wsppppp homieeeeeeeeeee
Rzqust [24]2 years ago
6 0

Heeeeeeeyyyyyyyyyyyyy

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The lengths of a lawn mower part are approximately normally distributed with a given mean = 4 in. and standard deviation = 0.2 i
Charra [1.4K]

Answer:

68 %

Step-by-step explanation:

Let's call X to the random variable ''lengths of a lawn mower part''.

X ~ N(given mean;standard deviation)

X ~ N(4 in;0.2 in)

To find the percentage,first we are going to turn this random variable X into a random variable Z. Z will be a N(0;1)

We do this by subtracting the given mean to the original variable and dividing by it deviation.

P (3.8 in < X < 4.2 in) =

P [(3.8 in - 4 in) / (0.2 in)] < [(X - 4 in)] / (0.2 in) < [(4.2 in - 4 in) / (0.2 in)]

P ( -1 < Z < 1 ) = P (Z < 1) - P (Z< -1)

Where we can find  P (Z < 1) and  P (Z< -1) in any table of a N(0;1)

P (Z < 1) - P (Z< -1) = 0.8413 - 0.1587 = 0.6826 = 68%

5 0
2 years ago
Read 2 more answers
Each year farmer records the number of pumpkins he sold for 5 weeks. The mean is 782 and the mean absolute deviation is 52. List
BARSIC [14]

Answer:

When we have a mean M and a standard deviation S, the values that are within the mean absolute deviation are all the values in the interval:

[M -S, M + S]

In this case, we have:

M = 782

S = 52

Then the interval is:

[782 - 52, 782 + 52]

[730, 834]

Then any number between 730 and 834 are possible answers to this question, for example, we can choose:

789 and 801

6 0
3 years ago
Mental math for 8×25×23
Ilya [14]
8 × 25 × 23 = 4,600

The answer is 4,600.
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3 years ago
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Find AB
Pavel [41]
A) 24 because it a very simple
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2 years ago
What is the discriminant of -2x to the power of 2 -x-1=0
Lorico [155]
Uhhh 67904- 67903-iwbisbeus e
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