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Question: A regional cancer treatment center has had success treating localized cancers with a linear accelerator. Whereas admissions for further treatment nationally average 2.1 per patient per year, the center's director thinks that readmissions with the new treatment are Poisson distributed, with a mean of 1.2 patients per year. He has collected the following data on a random sample of 300 patients:
Re-admission Last Year Patients 0 139
1 87
2 48
3 14
4 8
5 1
6 1
7 0
8 2
300
a. Adjust the data so that you can test the director's claim using a test statistic whose sampling distribution can be approximated by a chi-square distribution.
b. Assume the Type I error rate is to be controlled at 0.05. Do you agree with the director's claim? Why? Conduct a statistical procedure to support your opinion.
The Complement rule states that the probability of an event not occurring is
if a researcher is using a paired-sample sign test and has 4 positive signs 8 negative signs and 3 zeros what is the
q1. a pistachio rancher buys a new fertilizer system that is supposed to increase the yield per acre. she uses the
Assume that you want to use a 0.05 significance level to test the claim that paired sample data come from a population for which the mean difference is Ud = 0. Find (a) d-, (b) Sd, (c) the t test statistic, and the critical values.
Estimate a multiple regression model using revenue as your dependent variable. For independent variables, include population, average income, screens, theatre age, and dummy variables for mall and strip mall.
Iconic memory is a type of memory that holds visual information for about half a second. Compute Tukey's HSD post hoc test and interpret the results
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The next 20% a B, the next 42% a C, the next 18% a D and the bottom 12% an F. What average must you exceed to obtain an A?
the concept of type i and type ii error is critical and will come into play with each and every statistical test you
Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes.
Using only the top half of each data set, repeat (i). For this particular example, what effect, if any, does sample size have on the probability plots approach to probability model validation?
a man pays 400 for a 1 year life insurance with coverage of 200000.given his age he has a .995 chance of living for at
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