Session III Quiz

For the Descriptive Statistics report the mean and standard deviation for the price of the houses for each of the 3 locations.

You work in marketing for a company that produces work boots. Quality control has sent you a memo detailing the length of time before the boots wear out under heavy use. They find that the boots wear out in an average of 208 days, but the exact amount of time varies, following a normal distribution with a standard

Ryerson Automobile Insurance Company wants to estimate the mean time it takes for workers who are employed in downtown Toronto to get to work. A sample of 10 workers reveals the following number of minutes traveled.

E[Rp ] = (1 − wTb )RF,b + wTb E[RTb ] = (1 − 1.1735) × 0.02 + 1.1735 × 0.04386 = 4.80%.

5. Find the sample variance s2 for the following sample data. Round your answer to the nearest hundredth.

The amount of time it takes to recover physiologically from a certain kind of sudden noise is found to be normally distributed with a mean of 80 seconds and a standard deviation of 10 seconds. Using the 50%–34%–14% figures, approximately what percentage of scores (on time to recover) will be:

The area under the normal curve represents probability, and the total area under the curve sums to

a. Calculate how many half-lives have passed during the decay of the 100.0 g sample.

T = 47 days, TE = 43.17 days, and the sum of the variances for the critical activities is: (0.25 + 5.44 + 0.69 + 2.25) = 8.63. z T  TE  47  43.17 8.63  3.83  1.30 2.94

How many repair records should be sampled if the research firm wants the population mean number of miles driven until transmission failure to be estimated with the margin of error of 5000 miles? Use 95% confidence.

For this practical application assignment, make believe that you are a real estate agent living and working in southern Florida. The senior real estate partner of your firm e-mails you a document containing Florida pool home data, which you've retrieved from the Updates and Handouts section of this unit, and asks you to find ways describe the most important aspects of the home sale data. This technique is called descriptive statistics. The file contains data for 80 properties, including home prices, home sizes, number of bathrooms, niceness ratings, and whether

Question 2.2. (TCO 4) If it takes a supplier 25 days to deliver an order once it has been placed and the standard deviation of daily demand is 20, which of the following is the standard deviation of usage during lead time?

The average arrival rate of the jobs per day was 3.06. This was taken as the initial throughput for the system. Applying Little’s law,

Next, the task was to see the expected number of breakdowns per year. The information which was useful here was the graph in respect to the likely probability of a breakdown within a six week period of time that was provided by the case study itself. The first step was to input this information into Excel using a chart that plotted the x and y intervals of the 6 week period using the

d. What is the average time a patient spends in the office (wait plus service)?