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(a) Explain clearly what is meant by a false negative rate of 5% and a false positive rate of 15%. (b) If the population were screened, what proportion would be expected to test negative for metropathy? (c) What proportion of those testing negative actually have the disease? (d) Explain clearly in words why this proportion is so surprisingly small.
Suppose the following table shows the number of colds 7 different people got during the typical cold season based on the number of times they washed they washed their hands per day during the cold season.
Need a behavioral research situation that could use a Pearson coefficient research study and a chi square research study; also understanding the rational of each one.
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Will a 5% across-the-board raise increase the spread of the distribution as measured by the distance between the quartiles? Do you think it will increase the standard deviation?
Determine Probability using exponential distribution.The average time between failures of a laser machine is exponentially distributed with the mean of 40,000 hours.
The structure of a two factor study can be presented as a matrix with levels of one factor determining the rows and the levels of the second factor determining the columns. With this structure in mind, describe the mean differences that are evalua..
Suppose that on the morning after these games the newspaper's leading sports story begins with the headline " We Win...." What is the probability that the story is about the basketball team?
Evaluate and discuss the following hypothesis based on what you have learned about hypothesis statements. Should they be written differently, or are the sufficient the way they are stated?
Suppose that four American adults are asked if they ate at table-service restaurants last week. What is the probability that all of them say yes?
We desire to test at 0.05 level of significance whether modification increases the life of battery. What is our decision rule? Reject null hypothesis if calculated t is less than 1.96.
Our psychology department received a new statistics text for review. Prof. Smart in his review provided an interesting table of corrections.
Calculate numerical summaries including measures of central tendency such as mean and median and measures of variation including range and standard deviation.
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