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What is probability that a leap years selected at random will contain 53 Sundays?
probability = 2/7 to be exact, 28/97 (about 28.87%)
An integer between 1 and 30 all inclusive is selected at random what is the probability that the integer selected is a multipleof 5?
6 out of 30 ie 20% or 0.2
Twenty percent of students smoke what is the probability that a random group of seven is selected and four of them smoke?
Approx 0.0287
In a classroom the students are 11 boys and 1 girl if one student is selected at random find the probability that the student is a girl?
There is only one girl out of 12 students so the probability that the girl is selected is 1/12.
A sample selected in such a way that each members of the population has an equal probability of being chosen?
That is known as a simple random sample, or SRS.
What is the probability for a student in a dormitory to be selected if 10 percent of the students live in dormitories and a random sample of 100 is selected?
The probability is 10 percent.
What is the probability that two people selected at random have the same birthday?
1/365 = 0.00274
What is the probability the random variable will assume a value between 40 and 60?
It depends on what the random variable is, what its domain is, what its probability distribution function is. The probability that a randomly selected random variable has a value between 40 and 60 is probably quite close to zero.
What is probability that a leap years selected at random will contain 53 Sundays?
probability = 2/7 to be exact, 28/97 (about 28.87%)
Sample selected in such a way that each member of the population has an equal probability of being included?
random sample
How does sampling becomes random?
When each member of the population has the same probability of being selected as a member of the sample.
Approximately 10 percent of people are left-handed If two people are selected at random what is the probability that both are right handed?
The probability is approx 0.81
An integer between 1 and 30 all inclusive is selected at random what is the probability that the integer selected is a multipleof 5?
6 out of 30 ie 20% or 0.2
What sample selected in such a way that each member of the population has an equal probability of being included?
It is a simple random sample.
What is a sample selected in a such a way that each member of the population has an equal probability of being included?
This is called a random sample.
When every Member of a population has the chance of being selected based on probability what type of sampling is this?
Simple random sampling.
Twenty percent of students smoke what is the probability that a random group of seven is selected and four of them smoke?
Approx 0.0287
