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

The length of time for long-distance phone calls has been found to be normally distributed, with a mean of 20.8 minutes and a standard deviation of 6.7 minutes. In a randomly selected sample of 68 calls, what is the sample average call time below which 10% of sample average call times will be shorter? (2 decimal places)

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

Question 7A statistical analysis of 2,000 long-distance telephone calls made from the headquarters of theBricks and Clicks Computer Corporation indicates that the length of these calls is normallydistributed, with 𝜇 = 300 seconds and 𝜎 = 50 seconds. (4 marks)(a) What is the probability that a call lasted less than 210 seconds?(b) What is the probability that a call lasted between 210 and 320 seconds?(c) What is the probability that a call lasted between 100 and 210 seconds?(d) 10% of all calls will last less than how many seconds?

1:13:55Question 16Not yet answeredMarked out of 9.00Flag questionTipsQUESTION 1The manager of a computer shop is recording the time taken for customers to decide of which computer and accessories they buy from the time they enter the store. From the previous data, it is known that the average ‘decision’ time was 45 minutes. The manager assumes a normally distributed population with a standard deviation of 10 minutesa)  What is the probability that a customer will take more than 60 minutes?b)  What proportion of customers will take between 35 and 60 minutes?c)  From a sample of 36 customers, what is the probability that the sample mean will be less than 40 minutes?

b)  What proportion of customers will take between 35 and 60 minutes?