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3 years ago

How do you find the lower quartile and the upper quartile (using a cumulative frequency table)

Mathematics

1 answer:

Colt1911 [192]3 years ago

4 0

Answer:

Step-by-step explanation:

take the total frequency from the data given i.e n

for upper quartile you multiply by 3/4 and for lower quartile you multiply by 1/4

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Plz help will mark brainliest if correct

Nutka1998 [239]

Answer:

Step-by-step explanation:

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2 years ago

Prove that f(x)=x+3/2 and g(x)=2x-3are inverse

goldfiish [28.3K]

Answer:

Proofs

Step-by-step explanation:

$f(x) = x + \frac{3}{2}$

$y = x + \frac{3}{2}$

$x = y + \frac{3}{2}$

$x - \frac{3}{2} = y$

${f}^{ - 1} (x) = x - \frac{3}{2}$

They are not inverse because f^-1(x) = x - 3/2 is not the inverse to g(x) = 2x - 3.

5 0

2 years ago

Round off 3. 55 to one significant figure

Anika [276]

Answer:

3.6

Step-by-step explanation:

We must first clarify how a number is rounded.

To round a number to unity we have to look at the first number after the comma.

If this number is less than 5 (1, 2, 3, 4) we should not do anything, but if that number is 5 or greater (5, 6, 7, 8, 9) we must add a unit to the number.

That is to say:

<5 do nothing

=> 5 round to the next number (+1)

So in the case of 3.55 it would be.

3.55 = 3.6

8 0

3 years ago

Suppose two random variables, X and Y are independent, which statement is false? a) P(X∣Y)=P(X) b) P(X∪Y)=P(X)+P(Y) c) P(X∩Y)=P(

Svetlanka [38]

B is false, since by the inclusion/exclusion principle,

$P(X\cup Y)=P(X)+P(Y)-P(X\cap Y)$

By independence, we have $P(X\cap Y)=P(X)P(Y)$ , which is zero if either of $P(X)$ or $P(Y)$ is 0, which isn't guaranteed.

5 0

2 years ago

43/21 decimal rounded to the nearest hundredth

Step2247 [10]

Answer:

2.05

Step-by-step explanation:

4 0

2 years ago