The scale from a playground to a scale drawing of the playground is 4 meters per centimeter.The length of the drawing of the pla
1 answer:
You might be interested in
Answer: c)
Step-by-step explanation:
This can be done through trial-and-error. Use the pythagoreas' theorem and if the left side of the equation is equal to the right, that is the answer.
(Do take note that c is the longest side.)
a)
Since , a) is wrong.
b)
Since , b) is wrong.
c) (answer)
Since , c) is correct.
d)
Since , d) is wrong.
Answer:
The mean and the standard deviation of the number of students with laptops are 1.11 and 0.836 respectively.
Step-by-step explanation:
Let <em>X</em> = number of students who have laptops.
The probability of a student having a laptop is, P (X) = <em>p</em> = 0.37.
A random sample of <em>n</em> = 30 students is selected.
The event of a student having a laptop is independent of the other students.
The random variable <em>X</em> follows a Binomial distribution with parameters <em>n</em> and <em>p</em>.
The mean and standard deviation of a binomial random variable <em>X</em> are:
Compute the mean of the random variable <em>X</em> as follows:
The mean of the random variable <em>X</em> is 1.11.
Compute the standard deviation of the random variable <em>X</em> as follows:
The standard deviation of the random variable <em>X</em> is 0.836.