Continuous Probability

The probability for a given range of a continuous random variable can be calculated by measuring the area underneath the density function in that range.

• true

• false

What shape is a normal distribution curve?

• Half curve

• Round curve

• Bell curve

• Square curve

Calculate the standard deviation of a uniform distribution, knowing the domain is 12≤x≤68

• 16.17

• 12.89

• 15.67

• 17.16

On average, 28 patients per hour arrive in the Foxboro 24-Hour Walk-in Clinic on Friday between 6 p.m. and midnight. What is the approximate probability of fewer than 25 arrivals?

• 0.2546

• 0.3228

• 0.7454

• 0.6772

Identify whether the experiment involves a discrete or a continuous random variable.

Measuring the length of time it takes before a dolphin surfaces in the ocean to breath

• Discrete Random Variable

• Continuous Random Variable

Which one of these variables is a continuous random variable?

• The time it takes a randomly selected student to complete an exam.

• The number of tattoos a randomly selected person has.

• The number of women taller than 68 inches in a random sample of 5 women. 

• The number of correct guesses on a multiple choice test. 

What does PDF in Continuous Probability Distribution stand for?

• Portable Document Format

• Probability Density Format

• Probability Dignity Function

• Probability Density Function

Which of the following can be represented by a continuous random variable?

•  The high daily temperature in Tampa, Florida during the month of July, measured in degrees.

• The number of customers who visit a department store between 10:00 am and 11:00 am on Mondays.

•  The number of typos found on a randomly selected page of a textbook.

• The number of students who will get financial assistance in a group of 50 randomly selected students.

What is the distribution with a mean of 0 and a standard deviation of 1 called?

• Frequency Distribution

• Standard Normal Distribution

• Z-score

• Binomial probability distribution

What is NOT a characteristic of a random variable that is a candidate for normality?

• Be measured on a continuous scale

• Unimodal

• Exhibit tapering tails

• Don’t possess a clear center