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Question 1: A neighbourhood medical centre initiates a study to evaluate the wait time. The records of 18 randomly selected patients seen since the new procedures were put in place are checked, and the time between entering the emergency department and being seen by urgent care personnel was observed. The mean wait time was 17.82 minutes with a standard deviation of 5.68 minutes. Estimate the mean wait time using a 99% confidence interval. Assume that wait times are normally distributed.
Question 2: The city's Transit Commission wants to determine if there is a need for a change in the frequency of service over certain bus routes. It is determined that the average number of miles traveled by bus over the routes in question by all residents in a given area is about 6.8 per day. If the average number of miles traveled per person differs from 6.8 miles per day then changes in service may be necessary. Use a level of significance of alpha =.05.
A random sample of 145 bus riders is taken and it is found that the sample mean is 5.9 miles per resident per day with a standard deviation is 3.7 miles. Is a change in service necessary?
a study showed that 32 of all firms in county a are owned by women. you are phoning local businesses assuming that the
question 1 a usa today snapshot states that the government claims that there is a significant difference in the mean
Test at the 5% level of significance whether the true mean time it takes for luggage to reach the travelers is less than 17 minutes. Determine the null hypothesis.
Suppose in a population of 100,000, the probability that an individual will die from bird flu in a given winter is .00009. If the data fits a Poisson distribution, then the mean number of people in that population that will die from bird flu in on..
Based on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
One sample has a variance of s2=6 and a second sample has a variance of s2=8. If the two samples are the same size (n1=n2), then what is the pooled variance for the two samples?
What is the rejection point at α = .10 and indicate if you would accept or reject H o ?
The "Top Three" at a racetrack consists of picking the correct order of the first three horses in a race. If there are 10 horses in a particular race, how many "Top Three" outcomes are there?
Can the five-year rate of return be estimated based on the assets of the Fund? Determine the regression equation. Use assets as the independent variable.
A multicenter clinical trial involving 17,000 patients suspected of having acute myocardial infarction was conducted. The vascular death rate after 5 weeks was compared in patients receiving aspirin versus those not receiving aspirin
Jars have exactly the same number of red, orange, yellow, green, blue, and violet jelly beans. What is the maximum number of jars the factory can produce?
what is the probability that a salesperson selected at random will have below average sales ability and fair potential
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