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Suppose you are considering tracking patient falls. If you track only the raw number of patient falls, you may not be able to compare fall rates accurately. Since the number of patients per night may fluctuate and the type of patient may be different from day to day, how may you consider standardizing falls for comparison purposes.
For the sake of illustration, let's assume there are 20 patient rooms on the floor, with 30 days in the month. Let's assume each room is occupied throughout the month That would be 600 patient nights for the month at full capacity. Assume there were 10 patient falls that month.
Now let's consider the same floor of 20 patient rooms and a month with 30 days. However, the average occupancy for the month was 15 rooms over the month. There were 8 patient falls recorded that month.
During this second month, we witnessed fewer patient falls. However, was the rate of patient falls less for the second month? Why?
What fraction of the calls last between 4.2 and 5 minutes?
A website has determined that the length of time that users spend on its site is normally distributed with a mean of 5.83 minutes and a standard deviation.
what was the modal response and What strikes you about this frequency distribution - What does the graph suggest about the center and spread
Find the approximate percentile ranks of these scores by constructing a percentile graph (Ogive).Use the Ogive, estimate percentile of a student who scored 200 points in the test? What is the student score must be in order in the 90 percentile?
This is an Excel sheet that calculates both probabilities and percentiles for any normal or standard normal probability distribution. Replaces normal probability tables.
Is there any significant relationship between gender and the variable IQcat? If so, what is it and is the mean exam grade significantly larger than 75?
Again, suppose that Intel Corp.'s shipment contains 10% defective microprocessors. In cell C11, find the average number of defectives we expect in a sample of 5 microprocessors.
Is there any evidence to suggest that the mean dioxin level in the blood of residents living near the incinerator is greater than 10 ppt? Assume σ = 2.66, use a = 0.05, and compute the p value.
Can this study be used to conclude a causal relationship between increased stress and muscle cramps?
A sample of 400 bags of dog food which are advertised to contain twenty-five pounds had a mean content weight of 24.5 pounds with a standard deviation of 3 pounds.
Construct a? 99% confidence interval for the population proportion. Interpret the results.
A psychologist studying addiction tests whether cravings for cocaine and relapse are independent or related. The following table lists the observed frequencies.
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