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3 years ago

15

Determine whether the quantitative variable is discrete or continuous. Number of lightning strikes in a city in one yearnumber o

f lightning strikes in a city in one year is the variable discrete or continuous?

1 answer:

charle [14.2K]3 years ago

8 0

solution:

The variable is discrete because it is countable.

The number5 of lightning strikes in a city in one year is countable value.

So, it is discrete

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Let X be a random variable that is equal to the number of times a 5 is rolled in three rolls of a fair 5-sided die with the inte

Svetradugi [14.3K]

Answer:

Step-by-step explanation:

Note: If you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

Firstly we will make PMF

For X=0, P=(4/5)^3=64/125

For X=1, P=C(3,1)*(1/5)*(4/5)^2=3*16/125=48/125

For X=2, P=C(3,2)*(1/5)^2*(4/5)=3*4/125=12/125

For X=3, P=C(3,3)*(1/5)^3=1/125

So,

E[X^2]=1*48/125+2^2*(12/125)+3^2/125=0.84

E[X]=48/125+12/125*2+1/125*3=0.6

So,

E[X]^2=0.36

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3 years ago

What is 5.68 x 10^4 in standard form

scZoUnD [109]

Answer:

Since the exponent of the scientific notation is positive 4, move the decimal point 4 places to the right.

56800

Step-by-step explanation:

5.68(104)

=5.68*104

=5.68*(10*10*10*10)

=56800

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3 years ago

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zavuch27 [327]

Answer:

IDK

Step-by-step explanation:

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3 years ago

Tuesday’s attendance was 70% of Monday’s attendance, 50. What was Tuesday’s attendance?

lara [203]

Answer:

35

Step-by-step explanation:

100 / 50 = 2

70 / 2 = 35

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3 years ago

Hell me plz, and can plz explain as well

Montano1993 [528]

The sixth graders collected $250 of their $300 goal. The seventh graders collected $250 of thier $450 goal.

Sixth Graders:
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Reduce: $25 / $30 = 5/6

Seventh Graders:
$250 / $450
Reduce: $25 / $45 = 5/9

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3 years ago