question 4.41 2 R. Lyman Ott, Michael Longnecker - An Introduction to Statistical Methods and Data Analysis-Cengage (2016).pdf - Adobe ReaderFile Edit View Window Help215 (228 of 1179)125%CommentSharey1345678910P(y).100.130.250.160.095.075.063.047.041.024.015arch termtentsa. Construct a graph of P(y).b. Compute P(y= 2).c. Compute P(y>7).d. Compute P(2 < y< 7).laceEI Statistics &Scientific MethodBus.4.41 A traditional call center has a simple mission: Agents have to answer customer calls fastand end them as quickly as possible to move on to the next call. The quality of service renderedby the call center was evaluated by recording the number of times a customer called the centerET Surveys &ExperimentalStudies to gatherback within a week of his or her initial call to the center.Data+ P Data DescriptionET Probability &y = number of recalls12346P(y).151232.354.161.067.021.014ProbabilityDistributionsa. What is the probability that a customer will recall the center more than three times?b. What is the probability that a customer will recall the center at least two times but+P Inferences aboutPopulation Centralless than five times?Valuesc. Suppose a call center must notify a supervisor if a customer recalls the centermore than four times within a week of his or her initial call. What proportion ofcustomers who contact the call center will require a supervisor to be contacted?EP InferencesComparing 2Population CentralValues4.8Two Discrete Random Variables: The Binomial and the Poisson+P Inferences about4.42 A biologist randomly selects 10 portions of water, each equal to .1 cm³ in volume, fromthe local reservoir and counts the number of bacteria present in each portion. The biologist thentotals the number of bacteria for the 10 portions to obtain an estimate of the number of bacteriaper cubic centimeter present in the reservoir water. Is this a binomial experiment?PopulationVariancesBlo.+ P Inferences aboutmore than 2Population CentralPol. Scl.4.43 Examine the accompanying newspaper clipping. Does this sampling appear to satisfy theValuescharacteristics of a binomial experiment?ENG 12:07 AMP Type here to search71°FIN9/25/2021

Given: y P(y) 0 0.151 1 0.232 2 0.354 3 0.161 4 0.067 5 0.021 6 0.014 Total 1

4.41 A traditional call center has a simple mission: Agents have to answer customer calls fast and end them as quickly as possible to move on to the next call. The quality of service rendered by the call center was evaluated by recording the number of times a customer called the center back within a week of his or her initial call to the center. y = number of recalls 1 2 3 4 5 6 P(y) .151 232 354 .161 .067 .021 .014 a. What is the probability that a customer will recall the center more than three times? b. What is the probability that a customer will recall the center at least two times but less than five times? c. Suppose a call center must notify a supervisor if a customer recalls the center more than four times within a week of his or her initial call. What proportion of customers who contact the call center will require a supervisor to be contacted?