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Collect the Data Go to your local supermarket. Ask 30 people as they leave for the total amount on their grocery receipts. (Or, ask three cashiers for the last ten amounts. Be sure to include the express lane, if it is open.)
Record the values. | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ | \_\_\_\_\_\_\_\_\_\_ |
Construct a histogram of the data. Make five to six intervals. Sketch the graph using a ruler and pencil. Scale the axes.
Calculate the following:
\_\_\_\_\_\_\_\_
Uniform Distribution Test to see if grocery receipts follow the uniform distribution.
For each fifth, count the observed number of receipts and record it. Then determine the expected number of receipts and record that. | Fifth | Observed | Expected | |———- | 1st | | | | 2nd | | | | 3rd | | | | 4th | | | | 5th | | |
Sketch a graph of the situation. Label and scale the x-axis. Shade the area corresponding to the p-value.
Exponential Distribution Test to see if grocery receipts follow the exponential distribution with decay parameter
.
as the decay parameter, X ~ Exp(\_\_\_\_\_\_\_\_\_).
For each cell, count the observed number of receipts and record it. Then determine the expected number of receipts and record that. | Cell | Observed | Expected | |———- | 1st | | | | 2nd | | | | 3rd | | | | 4th | | | | 5th | | | | 6th | | |
Sketch a graph of the situation. Label and scale the x-axis. Shade the area corresponding to the p-value.
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