How can you use the item-total statistics from the reliability program to decide whether reliability could be improved by dropping some items?
Answer to relevant QuestionsGive an example of a specific sampling strategy that would yield a random sample of 50 households from the population of 2,000 households in that particular town. You may assume that the telephone directory for the town ...Draw a sketch of the standard normal distribution. What characteristics does this function have? In your own words, what does an SS tell us about a set of data? Under what circumstances will the value of SS equal 0? Can SS ever be negative? When you compute difference scores (for a paired samples t test), what happens to the parts of scores that are associated with stable individual differences among persons? (In the models in this chapter, these parts of ...Examine the data in Table 21.5, which report the outcomes for the Physician’s Health Study that assessed the effect of a low-dose aspirin regimen on risk of heart attack. a. For the group of patients that had the low-dose ...
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