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Suppose that the hypotheses H0:P=.35 and Ha:p>.35 are to be tested. Calculate the ovserved z-statistic for the sample data where forty our of eighty test subjects have the characteristic of interest.
a z=1.88
b z=-.94
c. z=2.81
d. z=-1.87
consider two random variables with standard deviations equal to 1.5 and 2.1. the standard deviation of the average of
Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
Assume that Leo advertises "If it takes more than 30 minutes to get your pizza, you get it free". What percentage of his take-out pizzas will have to give away free?
Determine the probability of exactly one success given Poisson distribution with mean of 2.0.
a random sample of 16 csn students is taken. the average age in the sample was 27 years with a standard deviation of 4
open the StatCrunch file Housing_Prices_Categorical_ Factors. The varia bles in the file are explained in the file description in StatCrunch. Look at the description of the variables in the file and the variables themselves and develop a "research q..
Calculate the mean and standard deviation for this set of data. Convert your answer back to dollars and cents and give the correlation value between number of beers consumed and BAC?
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
We code middle-aged Americans as 1 and senior citizens as 0, the logistic regression model for senior citizens
Define what a hypothesis is and discuss the relationship between hypothesis testing and statistics. Discuss what independent and dependent variables are in an experiment, state the relationship between the two and give an example.
a researcher wishes to conduct a study on the self-esteem levels of adolescents. she believes that male adolescents
question a car averages 27 miles per gallon. if gas costs 4.04 per gallon which of the following is closest to how much
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