5. The significance level, alpha, is the probability of: committing Type 1 Error. O committing Type II Error. O rejectin

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5 The Significance Level Alpha Is The Probability Of Committing Type 1 Error O Committing Type Ii Error O Rejectin 1 (438.59 KiB) Viewed 102 times

5. The significance level, alpha, is the probability of: committing Type 1 Error. O committing Type II Error. O rejecting the null hypothesis. rejecting the alternative hypothesis. 6. A smoke alarm is supposed to make noise when there is a fire and stay silent when there is no fire. Designers of a smoke detector would use the following hypotheses: HO: There is no fire. HA: There is a fire. If you were designing a smoke detector, would you want to pick a large alpha or small alpha? O A Type I error is worse than a Type Il error, so I would pick a large alpha. O A Type I error is worse than a Type Il error, so I would pick a small alpha. O A Type II error is worse than a Type I error, so I would pick a large alpha. O A Type II error is worse than a Type I error, so I would pick a small alpha. 7. Prop XYZ is coming up on the ballot. A polling agency takes a random sample and finds that the 52% of those surveyed support the proposition with a margin of error of 4%. What best describes what this means? There is a 95% probability that the proportion of voters that will support the ballot is between 48% and 56%. There is a 95% probability that another sample of voters will have between 48% and 56% supporting XYZ. The proportion of voters that support Prop XYZ is between 48% and 56% with the selected level of confidence. O With 95% confidence, Prop XYZ has 52% of voter support.