A telephone company claims that the service calls which they receive are equally distributed among the five working days of the week. A survey of 90 randomly selected service calls was conducted. Is there enough evidence to refute the telephone company's claim that the number of service calls does not change from day to day? The number of calls on Monday is 17. The number of calls on Tuesday is 19. The number of calls on Wednesday is 23. The number of calls on Thursday is 21. The number of calls on Friday is 10. State the null and alternate hypothesis in terms of the expected proportions for each category.

The Customers Service Center of a large bank receive calls from customers. The number of incoming calls between 8:00 AM and 8:10 AM in consecutive days were recorded. The number of incoming calls during the working days of the month of September were 8, 10, 6, 7, 12, 7, 8, 7, 8, 6, 9, 4, 6, 14, 10, 10, 10, 10, 6, 10, 12, 7. The number of incoming calls during the working days of the month of February were 9, 11, 14, 6, 4, 6, 7, 3, 3, 2, 5, 6, 6, 5, 6, 7, 5, 4, 3, 5. In light of the description given, select the correct answer. The height of the fourth bar from the left of the bar plot for the month of February represents the fact:Question 4Answera.In 4 of the days of the month of February there were 5 incoming calls.b.In 5 of the days of the month of February there were 4 incoming calls.c.In 4 of the days of the month of February there were 2 incoming calls.d.In 2 of the days of the month of February there were 4 incoming calls.

A Customer Telephone Center receives 1,200 calls in a 24-hour period. Of these calls, 75% occur between 9:30 a.m. and 3:30 p.m., and calls are evenly distributed during this time. If each person handles 10 calls an hour, how many people are needed to handle calls during these hours?2018515

The following histogram displays data from a cable repair company’s in-home service calls. The technicians were asked to record how long each visit took. Approximately what percentage of service calls lasted at least 120120 minutes? Round you answer to the nearest percent.50403020100-2930-5960-8990-119120-149150-179242450293223FrequencyDuration of a visit, mins

You manage a call center that processes orders.  One measure of efficiency in your department is the time spent on each call.  You need to report to your superiors on the time-per-call in your call center each month.  You’ve identified a small group of employees who are considerably more efficient than the others, and you know that efficiency tends to decrease, in general, on Fridays.Identify the ethical issue(s) involved in developing a sampling protocol:Group of answer choicesThere are none. It’s a simple mathematical operation.In order to get a random and representative sample, you need to consider how efficiency fluctuates over the month, and sample call times on a frequency that includes every day of the week.The analysis and reporting should consider the impact of extreme values in the data.

At which phase of a business phone call does the caller collect or verify information?Group of answer choices12345