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A doctorhas developed an experimental drug for toe-nail fungus. He needs to test it out on some people to make sure it works. He has a list of 2000 people who could be potential subjects in his study. 1120 of these potential subjects have toe nail fungus. A random sample of 75 people will be drawn from this pool and surveyed about whether they have toe-nail fungus. Let F be the number of people in the sample with toe-nail fungus. a) Define F in terms of the story and name the distribution and its parameters. b) What is the expected number of people in his sample that have toe-nail fungus? c) Set up an equation to find the probability that exactly 40 people in his sample had toe-nail fungus. Fill in all the values, but do not solve. d) What is a good approximation for the random variable described in this scenario and what are its parameters? Why are you able to use this approximation? e) What is the approximate probability that 40 people in his sample have toe-nail fungus
British airways employs you as cunsultant to analyse the departure time of flight leaving Cape Town International Airport. The acceptance time frame for departures is 0 for on-time plus or minus 15 minutes. During a typical week the following flights..
According to the data from the College Entrance Examination Board, scores on the SAT-I test have a mean of 1017, and Q1 is 880.
If one of the Titanic passengers is randomly selected, find the probability of getting a woman or someone who didn't survive the sinking.
Test the claim by random sampling 60 hgh school boys. Researcher found 54 boys have a cell phone at a = 0.01. Should the claim be rejected?
Develop a point estimate of the number of minutes per day officeworkers waste trying to locate mislabeled, misfiled, or misplaced items.
The Wilcoxon rank sum of the ranks for group and The value of the Wilcoxon signed rank statistic
Times spent studying by students in the week before final exams follow a normal distribution with standard deviation 8 hours. A random sample of four students was taken in order to estimate the mean study time for the population of all students.
The study compared the number of Hm-2 gene mutations in each group. The data table is below.
A. what is the probability a randomly chosen business customer flying is on a jumbo jet? B. what is the probability a randomly chosen non-business customer is on an ordinary jet?
The data follow. Males Females 27 25 25 29 19 18 10 23 16 20 22 15 14 19 (a) What statistical test should be used to analyze these data?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Compute the kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
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