Self-Check 2.3, 2.4
- Page ID
- 36464
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Self-Check 2.3, 2.4
1. For the following 11 salaries, calculate the IQR and determine if any salaries are outliers. The salaries are in dollars. $33,000; $64,500; $28,000; $54,000; $72,000; $68,500;
$69,000; $42,000; $54,000; $120,000; $40,500.
2.Forty bus drivers were asked how many hours they spend each day running their routes (rounded to the nearest hour).
| Amount of time spent on route (hours) | Frequency | Relative Frequency | Cumulative Relative Frequency |
| 2 | 12 | 0.30 | 0.30 |
| 3 | 14 | 0.35 | 0.65 |
| 4 | 10 | 0.25 | 0.90 |
| 5 | 4 | 0.10 | 1.00 |
a. Find the 65th percentile.
b. Find the third quartile.
3. Listed are 29 ages for Academy Award winning best actors in order from smallest to largest. 18; 21; 22; 25; 26; 27; 29; 30; 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77.
a. Find the 20th percentile.
b. Find the 55th percentile.
4.Listed are 30 ages for Academy Award winning best actors in order from smallest to largest. 18; 21; 22; 25; 26; 27; 29; 30; 31, 31; 33; 36; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77.
a. Find the percentiles for 47.
b. Find the percentiles for 31.
5. Construct a box plot for the data values shown.
0; 5; 5; 15; 30; 30; 45; 50; 50; 60; 75; 110; 140; 240; 330.