MAT-152 Written Assignment 3
Answer the following questions. You can either handwrite your solutions (e.g., by printing this
document and writing on paper or by using drawing software), or you can type your solutions.
SHOW ALL OF YOUR WORK
, including anything entered into your TI-84 or any Excel commands.
In a psychology experiment, a sample of 10 subjects were given 5 minutes to complete a particular task. Their time on the task (in seconds) is given below:
175
190
250
230
240
200
185
190
225
265
1.
Calculate the mean of the data set by hand
. You can use your calculator or Excel for
basic arithmetic, but DO NOT
just use 1-Var Stats
in the TI-84 or the AVERAGE
function in Excel. Label the mean with the appropriate symbol and round your answer
to 2 decimal places, if necessary. SHOW ALL OF YOUR WORK
.
2.
Reorder the data set from smallest to largest and calculate the median of the data set
by hand
. You can use your calculator or Excel for basic arithmetic, but DO NOT
just use
1-Var Stats
in the TI-84 or the MEDIAN
function in Excel. Round your answer to 2
decimal places if necessary. SHOW ALL OF YOUR WORK
, including reordering the data
set.
3.
Find the mode(s) of the data set. If the data set has no mode, explain why.
