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r has a built-in data set called leuk the third column indicates survival times in weeks for patients diagnosed with
you randomly sample 200 adults determine whether their income is high or low and ask them whether they are optimistic
in given exercise estimate the odds ratio and interpret the resultsexerciseyou randomly sample 200 adults determine
you observeincome daughterincome fathertotalhighmediumlowhigh305020100medium507030150low10204070total9014090320estimate
plot the estimated survival function hazard function and death density function from given table compare the results to
if we ignored the censored observations and the computed mean survival time using the usual formula for the mean and
the following data are survival times in days from a life-threatening condition 15 18 18 21 21c 25deg 26 graph the
the null and alternate hypotheses areh0 micro1nbsp micro2h1 micro1nbsp micro2a random sample of 10 observations from
according to act results from the 2008 act testing the mean reading score was 214 with a standard deviation of 60
the probability that first processing machine is not working properly at any time is 007 and the probability that the
the 70 n force acts on the end of the pipe at b determine the angles 0deg 180deg of the force that will produce the
a newspaper article preceding the 1994 world cup semifinal match betweenitaly and bulgaria stated that italy is favored
given that the church administration spent a great deal of money on this development and that it may continue to act as
1 for the observations21 36 42 24 25 36 35 49 32verify that the sample mean trimmed mean and median are xoline 3333
a class of fourth-graders was asked to bring a pumpkin to school each of the 29 students counted the number of seeds in
suppose health inspectors rate sanitation conditions at restaurants on a five point scale where a 1 indicates poor
1 for the frequencies f1 12 f2 18 f3 15 f4 10 f5 8 and f6 5 verify that the sample mean is 32 for the
in given exercise what is your estimate of the standard deviation sigmaexercisefor the observations21 36 42 24 25 36 35
1 in general will the winsorized sample variancesw2 be less than the sample variance s22 among a sample of 25 subjects
1 for the observations6 3 2 7 6 5 8 9 8 11verify that the sample variance and winsorized variance are 74 and 18
for the data in given exercise determine the ideal fourths and the corresponding interquartile rangeexercisefor the
for the data in given exercise which values would be declared outliers using the rule based on madexercisea class of
1 referring to the description of the population variance sigma2 devise a method of estimating sigma2 based on the
for a sample of n subjects the relative frequencies are f0n 2 f1n 4 f2n 2 f3n 15 and f4n 05 the sample mean is 145
1 for the values 1 2 3 4 5 6 7 8 9 and 10 there are no outliers if you increase 10 to 20 then 20 would be declared an