TI-84 One-Variable Statistics Concepts

This video tutorial explains how to use the TI-84 graphing calculator for one variable statistics. It covers calculating the mean, sample and population standard deviations, and the five number summary, including quartiles. The tutorial also discusses different methods for determining quartiles and provides step-by-step instructions for entering data and running statistical calculations on the TI-84. Additionally, it highlights the importance of verifying the method used for quartile calculation and demonstrates how to create a box and whisker plot using the calculator.

What does 'X bar' represent in the one variable statistics tool on the TI-84?

• The mean or average

• The sum of the data values

• The population standard deviation

• The sample standard deviation

Which formula does the TI-84 use to calculate the position of the lower quartile (Q1)?

• 0.75 times the quantity n, plus one

• 2.25 times the quantity n, plus one

• 0.5 times the quantity n, plus one

• 1.5 times the quantity n, plus one

How does the TI-84 handle the median when calculating quartiles with an even number of data values?

• It includes the median in both halves

• It excludes the median from both halves

• It includes the median in the lower half only

• It includes the median in the upper half only

How does the TI-84 handle the median when calculating quartiles with an odd number of data values?

• Includes the median in the upper half only

• Includes the median in both halves

• Excludes the median from both halves

• Includes the median in the lower half only

When entering data into the TI-84, which list is used by default?

• L2

• L4

• L3

• L1

What is the first step in calculating one-variable statistics on the TI-84?

• Enter the data in L1

• Select the frequency list

• Calculate the sum of squares

• Press the graph key

What is the mean of the data set if the TI-84 shows X bar as 25.5?

• 27.5

• 26.5

• 25.5

• 24.5

Which of the following is NOT part of the five-number summary?

• Minimum

• Mean

• Median

• Maximum

What should you do if your quartile calculation method differs from the TI-84's method?

• Ignore the difference

• Verify the method you are supposed to use

• Use a different calculator

• Rely on the TI-84's calculation

What should you verify when using the TI-84 to calculate statistics with a given frequency?

• The sum of the data values

• The sample standard deviation

• The population standard deviation

• The method used for Q1 and Q3