Elementary statistics – Final assignment – Part two NOTE : Don’t use p-value for your decision...

Elementary statistics – Final assignment – Part two
NOTE : Don’t use p-value for your decision in hypothesis testing problem

Q2: a) You are interested in the average emergency room (ER) wait time at your local hospital. You
take a random sample of 50 patients who visit the ER over the past week. From this sample, the
mean wait time was 30 minutes and the standard deviation was 20 minutes. Find a 95%
confidence interval for the average ER wait time for the hospital. Interpret your result.
b) An experiment was carried out in which the result can either be a “positive” reaction or a
“negative” reaction. If the probability of a positive reaction is 0.4 and the experiment is repeated 6
times,
i) what is the probability that the number of positive reactions will be 2 times
ii) what is the probability that the number of positive reactions will be At least 1 times

Expert Solution

orchestra answered 2 years ago

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