Question
Asked Feb 3, 2020
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Bacterial contamination of surgical patients can occur from bacteria that contaminate the scrub suits worn by surgical personnel. A hospital administrator wanted to know if the mean bacterial content on scrub suits increased throughout the day. In order to determine this, he randomly sampled 19 doctors and measured the bacterial content on the shoulder of their scrubs at four times during the day: start of shift, immediately before lunch, immediately after lunch, and at the end of the shift.

 

Question:

According to the boxplots, 25% of doctors in this sample had a bacterial count of 24 or less at the end of the day. What percentage of doctors had a bacterial count of 24 or higher before lunch?

  • 0%
  • 25%
  • 50%
  • 75%
  • 100%

 

Time of Day
Start of Day
End of Dayt
Before Luncht
After Lunch
10
15
20
25
35
Bacterial Count
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Time of Day Start of Day End of Dayt Before Luncht After Lunch 10 15 20 25 35 Bacterial Count

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quartile defined as a special type of quantile which divides the number of data points into four more or less equal parts, or quarters. The first quartile (Q1) is defined as the middle number between the smallest number and the median o...

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