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Name Date Class _

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Investigation 3

1. Write three different statements that describe the variability in Leah'sreaction times from the value bar graph.

Leah-Female. Age 11

Trial 1 (see) 1.08

Trial 2 (see) 0.94

Ri Trial 3 (see) 0.64~

Trial 4 (see) 1.00

TrialS (see) 0.94

0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.60 2.80 3.00Trial Times (see)

2. Below is a value bar graph showing data about Ella's reaction times. CompareElla's reaction times to Leah's reaction times.a. Determine statistics for each student: means, medians, and ranges.

b. Is one student quicker than the other student? Explain your reasoning.

~e c. Is one student more consistent than the other student? Explain.=0:::!!2....c:

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Elia-Female, Age 11

Trial 1 (see)

0.80

1.25

Trial 2 (see) 0.95

Ri~ Trial 3 (see)

Trial 4 (see)

0.96

0.76

Trial 5 (see) I>

0.00 0.20 0.40 0.600.80 1.00 1.20 1.40 1.60 1.80 2.00 2.20 2.40 2.60 2.80 3.00Trial Times (sec)

167

l

Part 2 - Box and WhiskersThe box-and-whisker plot shows the weekly practice hours of two baseball teams.

a) Find the following for each set of data.- Median- Range- Interquartile Range

b) Use the median, ranges and interquartile ranges of the data to write twocomparing statements about the teams' practice times.

c) Which team do you think would be better (win more games)?

Team A-.I II • Team B

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2 4 , 8 10 12 14

Part 3- Histogram Total Number of Text Messa~es(sent over 12 hrs. by ih gradeti't TJMS)

Total Number of Instagram Images(sent over 12 hrs. by ih gradeOt TJMS)

1-~3-J4 5-~ 7'" q-Io n"'ia.IiO&,f~

a} Compare the variability of the two histograms. (Remember to use the title of the graphsand at least two statistic vocabulary words.) ----,