9. Centre and Spread

Here are Paul's scores from his last $13$13 rounds of golf played:

$64,66,68,70,72,74,78,84,102,106,112,124,128$64,66,68,70,72,74,78,84,102,106,112,124,128

a

What is his median score?

b

What is the lower quartile score?

c

What is the upper quartile score?

Easy

1min

There is a test to measure the Emotional Quotient (EQ) of an individual. Here are the EQ results for 21 people listed in ascending order.

$90,90,91,92,93,94,95,95,95,97,99,100,108,114,116,116,117,118,118,122,129$90,90,91,92,93,94,95,95,95,97,99,100,108,114,116,116,117,118,118,122,129

Easy

2min

Here are Adam's scores from his last $17$17 exams:

$38,44,48,51,56,58,62,70,74,78,80,82,85,88,92,94,100$38,44,48,51,56,58,62,70,74,78,80,82,85,88,92,94,100

Easy

2min

The airline *Flo Air* decided to keep track of flight delay times (the number of minutes after the scheduled time when the plane takes off) over a week. The $100$100 results are shown in the dot plot.

Medium

6min

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calculate and interpret quartiles, deciles and percentiles