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paolaz80045
10.03.2020 •
Mathematics
New York City is the most expensive city in the United States for lodging. The room rate is $204 per night (USA Today, April 30, 2012). Assume that room ratesa mally distributed with a standard deviation of $55. a. What is the probability that a hotel room costs $225 or more per ni b. What is the probability that a hotel room costs less than $140 per n c. What is the probability that a hotel room costs between $200 and $300 per ni me 25. are nor ght? ight? d. What is the cost of the most expensive 20% of hotel rooms in New York City?
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Ответ:
a. P=0.35
b. P=0.12
c. P=0.49
d. Cost: more than $249 per night.
Step-by-step explanation:
We assume a normal distribution with mean $204 and s.d of $55.
To calculate the probability we calculate the z-value for each case
a. What is the probability that a hotel room costs $225 or more
b. What is the probability that a hotel room costs less than $140
c. What is the probability that a hotel room costs between $200 and $300
d. What is the cost of the most expensive 20% of hotel rooms in New York City?
In this case, we have to estimate z' so thats P(z>z')=0.2. This value is z=0.841.
Then, the value of X should be:
Ответ:
Despite some evidence that suggest that finger ring use is associated with higher bacterial
colonization, healthcare providers continue to wear finger rings in a healthcare setting. The aim
of this systematic review was to synthesize the evidence to date regarding whether finger ring
use increases bacterial colonization of healthcare providers' hands. Articles that studied the
association finger ring use with hand hygiene and bacterial colonization were searched using
PubMed, Google Scholar, and Georgia State University's online library systems. The overall
results of this review suggest that finger ring use does increase the bacterial colonization on the
hands of HCPs but not with significant difference when compared to no finger ring use;
therefore, further research needs to be conducted to decide whether finger rings should be used in
a healthcare setting or not.