Determining the sum of probabilities

Reference no: EM1320419

Q1) You are given sample mean and sample standard deviation . Use this information to create the 90% and 95% confidence intervals for the population mean . Which interval is wider? If convenient, utilize technology to create the confidence intervals.

Random sample of 32 gas grills has mean price of $ 644.20 and standard deviation of $55.30

The 90 % confidence interval is ...........

The 95 % confidence interval is ...........

Which interval is wider? Select the right answer below.

a) The 90% confidence interval

b) The 95% confidence interval

2) Patients arrive at emergency room of cost a valley Hospital at average of 5 per day. Demand for emergency room treatment at cost a valley follows a poison distribution.

a) Calculate the probability of exactly 0,1,2,3,4, and 5 arrivals per day.

b) Determine the sum of these probabilities , and why is the number less than 1?

Reference no: EM1320419

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