This topic contains a solution. Click here to go to the answer

Author Question: The manager of a bank recorded the amount of time each customer spent waiting in line during peak ... (Read 182 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
The manager of a bank recorded the amount of time each customer spent waiting in line during
  peak business hours one Monday. The frequency table below summarizes the results.
 
  Waiting Time
  (minutes)
  Number of
  Customers
  0-3 9
  4-7 10
  8-11 12
  12-15 4
  16-19 4
  20-23 2
  24-27 2
  If we randomly select one of the customers represented in the table, what is the probability that the
  waiting time is at least 12 minutes or between 8 and 15 minutes?
  A) 0.558 B) 0.651 C) 0.093 D) 0.727

Question 2

A die is rolled 9 times and the number of times that two shows on the upper face is counted. If this
  experiment is repeated many times, find the mean for the number of twos.
 
  A) 7.5 B) 1.5 C) 2.25 D) 3



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

owenfalvey

  • Sr. Member
  • ****
  • Posts: 337
Answer to Question 1

A

Answer to Question 2

B



londonang

  • Hero Member
  • *****
  • Posts: 540
Both answers were spot on, thank you once again




 

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

Did you know?

There are 60,000 miles of blood vessels in every adult human.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

For a complete list of videos, visit our video library