stats unit 2

If calculations are​ time-consuming and if a sample size is no more than​ 5% of the size of the​ population, the​ _______ states to treat the selections as being independent​ (even if the selections are technically​ dependent).

5% Guideline for Cumbersome Calculations

Which of the following would be information in a question asking you to find the area of a region under the standard normal curve as a​ solution?

A distance on the horizontal axis is given

Indicate a similarity between a Poisson distribution and a binomial distribution.

Both distributions have an independence requirement.

In the binomial probability​ formula, the variable x represents the​

In the binomial probability​ formula, the variable x represents the number of successes.

For the binomial​ distribution, which formula finds the standard​ deviation?

Square root of npq

The standard deviation of the Poisson distribution is calculated using​ _______.

Square root of u

Which of the following is NOT a descriptor of a normal distribution of a random​ variable?

The graph is centered around 0.

Which of the following does NOT describe the standard normal​ distribution?

The graph is uniform.

What requirements are necessary for a normal probability distribution to be a standard normal probability​ distribution?

The mean and standard deviation have the values of 0 and 1

Which of the following is NOT a requirement of the Poisson​ Distribution?

The occurrences must be dependent.

Which of the following is not a requirement of the binomial probability​ distribution?

The trials must be dependent.

Which of the following groups of terms can be used interchangeably when working with normal​ distributions?

areas, probability, and relative frequencies

Finding probabilities associated with distributions that are standard normal distributions is equivalent to​ _______.

finding the area of the shaded region representing that probability

Identify the expression for calculating the mean of a binomial distribution.

np

The​ _______ distribution is a discrete probability distribution that applies to the number of occurrences of some event over a specified interval.

poisson

A main goal in statistics is to interpret and understand the meaning of statistical values. The​ _______ can be very helpful in understanding the meaning of the mean and standard deviation.

range rule of thumb

Which of the following is NOT a requirement for a density​ curve?

the graph is centered around 0

The notation ​P(z<​a) denotes​ _______.

the probability that Z score is less than A

A continuous random variable has a​ _______ distribution if its values are spread evenly over the range of possibilities.

uniform

Which of the following is NOT one of the three methods for finding binomial probabilities that is found in the chapter on discrete probability​ distributions?

using a simulation