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The following table (output from SPSS) represents the observed frequencies for the data presented in Exercise 17.22 and the adjusted standardized residuals for each of the cells.
Using this information and the criterion of 2, indicate for which of these cells there is a significant difference between the observed frequencies and expected frequencies.
a sample of alzheimers patients is tested to assess the amount of time in stage iv sleep. the number of minutes spent
Given the following data from three independent samples, use the 0.025 level in determining whether the population means could be the same.
in a survey 42 of the repsondents stated they talk to their pets on the answering machine or telephone. a vet believed
Run a simple linear regression of these five pairs of numbers and estimate a linear relationship between income and percentage growth in wealth.
Leaks occur in a pipeline at a mean rate of 4 leaks per 1,000 meters. In a 2,500-meter section of pipe, (a) Using the Poisson approximation to the binomial find the probability of no leaks? (Round your answer to 6 decimal places.)
it is decided to measure the resistance of sheets of a certain metal at temperatures x of 100 k 200 k 300 k 400 k and
Four homes are selected at random: What is the probability all four of the selected homes have a security system? (Round your answer to 4 decimal places.
Your company asks you to compare a new advertising campaign and the old one. Sample data on the accounts as follows:
Find the regression line with all of these states removed from the calculation. Draw this new line on your plot. Was this group of states inuential?
The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the emp..
Draw a single Venn diagram describing purchase/nonpurchase of the landmark by these two parties. Explain any assumptions you have made regarding mutual exclusivity of events.
How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5% with 98% confidence?
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