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Historically, 30% of the single policyholders for an insurance
company have filed at least one claim over the past 3 years. A
random sample of 600 policies written this year for single people
finds than 150 had filed at least one claim. a. At the 99%
confidence level, does it appear to that filing rates for single
persons have changed? b. If true filing rate is 0.20, find the
probability of committing a type II error.
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