Which one of these statistics is not affected by outliers? a. Range b. Interquartile range c. Standard Deviation d. Mean

A list of 5 pulse rates is: 53, 80, 74, 64, 70. What is the third quartile for this list?

a) 73
b) 80
c) 70
d) 74
e) 76
A study in Australia of 500 diabetes patients who tightly controlled their blood pressure showed a 41% reduction (proportion reduction=0.41) in the risk of adverse effects with a 95% confidence interval of 37%-45% (or 0.37-0.45). Suppose a similar study was conducted in USA which has a population about 15 times that of Australia. Also suppose that the study yielded a similar reduction but had 2000 participants. The resulting 95% confidence intervals for the US study will be:

a) about 1/4 as wide as the Australian interval
b) about 4 times as wide as the Australian interval
c) about 1/2 as wide as the Australian interval
d) about 15 times as wide as the Australian interval
e) the same size as the Australian interval
f) about twice as wide as the Australian interval

A set of exam scores has mean = 50 and standard deviation = 15. The instructor would like to transform the scores into a standardised distribution with mean = 100 and standard deviation = 21. Find the transformed value for X = 45 from the original population.

Type your answer with NO decimal places or any other extraneous text. (ie 41 would be marked correctly whereas 41.0 would be marked incorrectly. Similarly, X=41 which has extraneous text would be marked incorrectly.)


Which one of these statistics is not affected by outliers?
a. Range
b. Interquartile range
c. Standard Deviation
d. Mean

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