bana past quizzes for test #2

The student body of a large university consists of 60% female students. A random sample of 8 students is selected.What is the probability that among the students in the sample more than four are female? Use an Excel function and round your answer to three decimal places

0.594

If A and B are independent events with P(A) = 0.2 and P(B) = 0.6, then P(A union B) =

0.68

The function that defines the probability distribution of a continuous random variable is a

Uniform function NOTTTeither normal of uniform depending on the situation probability density function normal function

A normal distribution with a mean of 0 and a standard deviation of 1 is called

a standard normal distribution

A random variable that can assume only a finite number of values is referred to as a(n)

discrete random variable

A measure of the average value of a random variable is called

expected value

A measure of the average value of a random variable is called a(n)

expected value

The probability distribution that can be described by just one parameter is the​

exponential

To compute the probability that in a random sample of n elements, selected without replacement, we will obtain x successes, we would use the _____ probability distribution.

hypergeometric

The probability that a continuous random variable takes any specific value

is equal to zero

The key difference between the binomial and hypergeometric distribution is that, with the hypergeometric distribution, the

probability of success changes from trial to trial

Larger values of the standard deviation result in a normal curve that is

wider and flatter

If A and B are mutually exclusive events with P(A) = 0.295, P(B) = 0.32, then P(A | B) =

0.0000

The student body of a large university consists of 60% female students. A random sample of 8 students is selected.What is the probability that among the students in the sample exactly four are female? Use an Excel function and round your answer to three decimal places.

0.232

The student body of a large university consists of 60% female students. A random sample of 8 students is selected.What is the probability that among the students in the sample at most four are female? Use an Excel function and round your answer to three decimal places.

0.406

The probability distribution for the daily sales at Michael's Co. is given below. (In 1000s)Probability400.150.0460.0370.23 The probability of having sales of at most $50,000 is

0.5

The student body of a large university consists of 60% female students. A random sample of 8 students is selected.What is the probability that among the students in the sample at least four are female? Use an Excel function and round your answer to three decimal places.

0.826

The student body of a large university consists of 60% female students. A random sample of 8 students is selected.What is the expected number of females selected? Round your answer to one decimal place.

4.8

In a binomial experiment consisting of five trials, the number of different values that x (the number of successes) can assume is​

6

The weight of an object is an example

A continuous random variable

The number of customers that enter a store during one day is an example of

A discrete random variable

In the textile industry, a manufacturer is interested in the number of blemishes or flaws occurring in each 100 feet of material. The probability distribution that has the greatest chance of applying to this situation is the

Poisson distribution

Bayes' theorem is used to compute

The posterior probabilities

Two events with nonzero probabilities

can not be both mutually exclusive and independent

An experiment consists of determining the speed of automobiles on a highway by the use of radar equipment. The random variable in this experiment is a

continuous random variable

A numerical description of the outcome of an experiment is called a

random variable

If two events are independent, then

the product of their probabilities gives their intersection.