Find the probability that a randomly selected caller waits longer than 3 minutes.Hi need help here see attachment for questions. theres 2 attachments.

 

Hi, need help here, see attachment for questions. theres 2 attachments. The price Im willing to pay is $3 each , total $36.00.

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Normal distributions Records from a call centre show that over a long period of time, waiting times for callers are normally distributed with a mean of 2.5 minutes and a standard deviation of 1.7 minutes. Sketch the normal curves and calculate the probabilities in Questions 14 to 16. Question 1 Find the probability that a randomly selected caller waits longer than 3 minutes. Round z-value to 2 decimal places but retain 4 decimal places for your probability. Question 2 Find the probability that a randomly selected caller waits between 1 and 2 minutes. Round z-value to 2 decimal places but retain 4 decimal places for your probability. Question 3 Find the length of waiting time exceeded by 30% of all callers. Express your final answer to 2 decimal places. Design of experiments The head of the quality control department at a publishing company is studying the effect of type of glue and type of binding on the strength of the bookbinding. The company has three possible glues to choose from and the book can either be bound as a paperback or a hardback. Question 4 Write a short paragraph outlining an experiment to address the question of which combination of glue and binding is most effective and show this on a diagram. Explain how the principles of experimental design are met. Question 5 How many factors are there? Name them. How many treatments are there? Name them. Describe a suitable response variable and how it could be measured. Section E: Sampling design Human resources staff wish to survey a sample of workers from the StaffDetails data set to see how they view the health and fitness facilities and activities available in their workplace. Question 6 Use software to generate a simple random sample of 30 workers from StaffDetails. Take the screenshot of the software screen where you defined your simple random sample. Insert this screenshot in your report. List the ID numbers of those selected. Question 7…