Posted by **I need help** on Friday, June 19, 2009 at 3:10pm.

The speeds in miles per hour of 30

cars were checked by radar. The data are as follows:

62 67 69 72 75 60 58 86 74 68

56 67 82 88 90 54 67 65 64 68

74 65 58 75 67 65 66 64 45 64

Find the upper and lower quartiles

- math -
**drwls**, Saturday, June 20, 2009 at 6:20am
Rewrite the list in ascending order, and then divide the list into four parts. That will tell you the quartile boundaries.

45 54 56 58 58 60 62

64 64 65 65 65 66 67 67

67 67 68 68 69 72 74 74

75 75 82 86 88 90

Q2 = 67 (divides into upper and lower halves)

-------------

Q1 = 64 (median of lower half)

Q3 = 74 (median of upper half)

## Answer This Question

## Related Questions

- Business Math - The Principal of SACRO Primary is concerned that the average ...
- math - Two cars begin driving toward each other from towns that are 150 miles ...
- algebra - One car travels 105 miles in the same amount of time it takes a second...
- Statistics - It is claimed that 70% of the cars on the Valley Highway are going...
- Trigonometry- Help! - After one hour in flight, an airplane is located 200 miles...
- math - From a point on a straight road, two cars are driven in opposite ...
- MCC - There are two race cars. the sum of their fastest speed is 50o.3 miles per...
- Pre-calc - a driver averaged 50 miles per hour on the round trip between akron, ...
- Pre-Calc - a driver averaged 50 miles per hour on the round trip between akron, ...
- alegbra - From a point on a straight road, 2 cars are driven in opposite ...

More Related Questions