Vocabulary
The shape of the graph of a normal distribution is this.
What is bell-shaped?
A normal distribution has a mean of 15 and a standard deviation of 3. The value that is 3 negative standard deviations away from the mean is this.
What is 6?
The percentage of data located within 1 standard deviation of the mean.
What is 68%
In the inverse normal, you are given a probability and you must find the _________
What is value?
The average amount of hot fries in a bag is 8.5 ounces with a standard deviation of .5 ounces. What percent of bags have more than less than 7 ounces?
.0013
The mean of a standard normal distribution is this.
What is zero?
A normal distribution has a mean of 24 and a standard deviation of 6. 68% of the values of this distribution fall between what two data values?
What is 18 and 30?
These percentages roughly represent the percent of the data values that fall within one, two, and three standard deviations from the mean of a normal distribution.
What is 68–95–99.7%?
The average length of time it takes to run a race is 56 minutes with standard deviation 3.2 minutes. The fastest 1% of runners finish within x minutes. Find x.
What is 48.55 minutes?
Cookie man cookies have a diameter of 2.5 inches with a standard deviation of .15 inches. What percent of cookies have a diameter of more than 3 ounces
.0004 or .04%
The greek symbol used to represent standard deviation.
What is sigma (lower case) ?
A normal distribution has a mean of 8 and a standard deviation of 2. The value that is 2 positive standard deviations away from the mean is this.
What is 12?
The total area under the curve of a normal distribution is this.
What is one?
The average height of a student is 5'9". The standard deviation is 1.9 inches. 4% of students are above y feet. Find y.
What is 6.02 feet?
The average baby is born weighing 7.8 pounds with a standard deviation of 1 pound. What percent of babies weigh more than 11 pounds?
.07%
The greek symbol used to represent the mean.
μ
A normal distribution has a mean of 100 and a standard deviation of 10. The percentage of data values that fall between the values of 70 and 90 is this.
What is 15.85?
This measure of central tendency of a normal distribution represents the highest point on the curve
What is the mean?
The age of teachers is normally distributed. The average age of a teacher is 108 years with standard deviation 22 years. 25% of teachers are older than x years. Find x.
What is 122.83 years?
Water bottles are supposed to hold 12 ounces with a standard deviation of .2 ounces. What percent of the water bottles hold between 12 and 12.6 ounces
49.87%