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Q1) There are 3 hospitals in Tulsa, Oklahoma, area. Following data illustrate the number of outpatient surgeries carried out at each hospital last week. At.05 significance level, can we conclude there is a difference in mean number of surgeries performed by hospital or by day of week?
Number of Surgeries Performed
Day
St. Luke's
St. Vincent
Mercy
Monday
14
18
24
Tuesday
20
Wednesday
16
22
Thursday
Friday
28
Q2) Clark Heter is industrial engineer at Lyons Products. He would like to find out whether there are more units produced on afternoon shift than on day shift. A sample of 54 day-shift workers showed that mean number of units produced was 345, with standard deviation of 21. A sample of 60 afternoon-shift workers illustrated that mean number of units produced was 351, with standard deviation of 28 units. At the .05 significance level, is the number of units produced on the afternoon shift larger?
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots.
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
Data on distribution of cost for building effort, design work and testing effort.
What is the probability that a visually impaired student gets less than 6.9 hours of sleep?
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The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
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Compute average daily rainfall in the week and for weekends. Get the average of weekdays' rainfalls and average of weekend's rainfalls.
Suppose the population standard deviations are not the same. At.05 significance level, is there a difference in mean waiting time?
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