What's the area?<br><br> C= pi/2 <br><br> A=___

Left-handedness occurs in about 12% of all Americans. Males are slightly more likely than females to be left-handed, with 13% of

FinnZ [79.3K]

Answer:

a)Both X and Y can be well approximated by normal random variables.

Step-by-step explanation:

For each individual, there are only two possible outcomes. Either they are right-handed, or they are left-handed. This means that we can solve this problem using concepts of the binomial probability distribution.

Binomial probability:

Probability of exactly x sucesses on n repeated trials, with probability p.

The binomial probability can be well approximated by normal random variables, using the expected value $E(X) = np$ and the standard deviation $\sigma = \sqrt{np(1-p)}$

Let X be the number of males (out of the 100) who are left-handed.

$n = 100$ and $p = 0.13$ . Can be well approximated.

Let Y be the number of females (out of the 80) who are left-handed.

$n = 80$ and $p = 0.11$ . Can be well approximated.

The correct answer is

a)Both X and Y can be well approximated by normal random variables.

5 0

3 years ago

Please help me quick please solve in inequality form

Setler79 [48]

Answer:

D. The sum of twice number and six is no more than five.

Step-by-step explanation:

In the inequality,

$2n+6\leq 5$

The number (n) is multiplied by (2), therefore options (A) and (B) can be ruled out since they have the statement, "twice the sum of a number and six". Moreover, one can see the inequality sign indicates that this value is less than or equal to (5). Thus, one of the possible solutions to this equation is (5), therefore, option (C) is incorrect. Therefore, the only remaining correction option is option (D).

6 0

3 years ago

Y = 2x – 4 and y = x – 2

hammer [34]

Step-by-step explanation:

x=2

y=0

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