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The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.5 years and a standard deviation of 0.75 years. What is the upper quartile of battery shelf life?
physicians at a clinic gave what they thought were drugs to 940 patients. although the doctors later learned that the
1. suppose a realtor is interested in comparing the asking prices of homes in philadelphia and baltimore. a random
the study found 87 per cent of 1500 australians surveyed would support colour-coding on packaged food to indicate
Compute b1, slope of an OLS regression line using dollars spent as dependent variable (Y) and age as independent variable (X).
An occupational health study was carried out to evaluate the health status of workers. The response is forced expiratory volume (FEV), a measure of respiratory function.
in bernoulli trials p let vn be the number of trials required to produce either n successes or n failures whichever
there are 1000 students in the senior class at a certain high school. the high school offers two advanced placement
the number of people arriving for treatment at an emergency room can be modeled by a poisson process with a rate
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.
suppose a simple random sample of size 40 is selected from a population with 12. find the value of the standard error
Is there evidence the On-the-Move company has less claims? Using the 0.10 level of significance, What is the conclusion?
Name an application for the use of ANOVA. This can be in a professional setting, hobby, or something you find on the internet. What are some business situations where ANOVA would be more appropriate than a Z or T test?
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