And Probability

Two coins are tossed in an experiment. Which of the following list is the sample space?

• S= {HH, HT, TH, TT}

• S= {HH, TT}

• S= { HT, TH, TT}

• S= {HH, HT, TT}

Which of the following are the properties of a Normal Probability Distribution.

• The distribution curve is bell - shaped.

• The curve is symmetric about its center, the mean.

• The mean, the median, and the mode coincide at the center.

• The area under the curve is 1 or 100%

• The tails of the curve is asymptotic to the base line.

What is the probability that the value of a standard normal random variable z lies between 0 and 1.28?

The following table represents the probability distribution X, the employment status of adults in a city.

What is the probability that the adults isn't retired?

If you select one adult at a random from this community, what is the probability that the adults is employed as part -time?

If you select one adult at a random from this community, what is the probability that the adults is working either part - time or full - time? 

It is the set of all possible outcomes in an experiment.

• Random Variable

• Sample Space

• Mean

• Data

Supposed two coins are tossed consecutively and we are interested in the number of heads that will come out. Determine the values of the random variable H (number of heads).

• 0,2,3,4

• 0,1,2,3

• 0,1,2

• 0,1,2,3,4

If you had no idea what the answer to this four option multiple choice was and took a wild guess, what is the probability that you are correct?

TRUE or FALSE: The standard normal distribution of a random variable is a normal distribution with mean =0 and standard deviation =1.

• TRUE

• FALSE