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1. Letter and Digit. A new computer owner creates a password consisting of two characters. She randomly selects a letter of the alphabet for the first character and a digit (0,1,2,3,4,5,6,7,8,9) for the second character. What is the probability that her password is "k9"? Would this password be effective as a deterrent against someone trying to gain access to her computer?
2. Poll Confidence level. It is common for public opinion polls to have a "confidence level" of 95%, meaning that there is a 0.95 probability that the poll results are accurate within the claimed margins of error. If five different organizations conduct independent polls, what is the probability that all five of them are accurate within the claimed margins of error? Does the result suggest that with a confidence level of 95%, we can expect that almost all polls will be within the claimed margin error? 0.956
The regional tupperware dealers earned these commissions last month: what was the mean commision earned? round your answers to the nearest cents.
(a) Find the range. (b) Find the variance. (Give your answer correct to two decimal places.) (c) Find the standard deviation. (Give your answer correct to two decimal places.)
the article evaluation of criteria for setting speed limits on gravel roads measured speeds of vehicles on several
Jessica must finish two courses (much like myself), statistics and economics, in order to complete the requirements for a BA degree. All along she has maintained an 80% average.
to understand better the effects of exercise and aging on various cirulatory functions a study was done on 16
what are the appropriate h0 and ha for each of the following research studies? in addition note whether the hypothesis
Comprise appropriate (BPS formatted) descriptive statistics table inferential statistics table.
a population is normally distributed with 100 and s20.a. find the probability that a value randomly selected from this
The National Center for Health Statistics indicate that 29.9% of a sample of men and 0.5% of a sample of women are 6" or taller. Are these results generally consistent with your calculations?
Using a test, 80% of Down's Sydrome cases can be identified, while 5% of normals are detected as positive. What is the sensitivity and specificity of the test?
you have five employees with hourly wages listed with. the standard deviation of the population is 2.80.6 8 8 11 14a.
a researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. a
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