a. Null and alternative hypotheses. b. Possible Type I and Type II errors. c. Level of significance and rejection region.
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- What is an experiment?List the sample space of each experiment. Picking a one-digit numberAccording to a website, the mean outstanding credit-card debt of college undergraduates was $3173 in 2010. A researcher believes that this amount has decreased since then. Complete parts (a) through (e) below. (a) Determine the null and alternative hypotheses. Ho H₁: $ (Type integers or decimals. Do not round.) (b) Explain what it would mean to make a Type I error. If the sample data leads the researcher to (c) Explain what it would mean to make a Type Il error. If the sample data leads the researcher to (d) State the conclusion that would be reached if the null hypothesis was not rejected. sufficient evidence at the a level to support the researcher's belief that the mean credit card debt of college undergraduates has (e) State the conclusion that would be reached if the null hypothesis was rejected. sufficient evidence at the a level to support the researcher's belief that the mean credit card debt of college undergraduates has There www There the null hypothesis and the mean…
- The mean salary for a local police officer in Maine is $43,270 a year. Identify the type I AND type II errors for the hypothesis test of this claim.The claimed mean score for all NBA games during a season was 105 points per game. One coach thinks his team's mean score was less. Identify the correct null and alternative hypotheses. На: Identify in context the type I and type II errors for the hypothesis test. Type I error: Type Il error:Marketers believe that 92% of adults in the United States own a cell phone. A cell phone manufacturer believes that number is actually lower. 200 American adults are surveyed, of which, 174 report having cell phones. Use a 5% level of significance. State the null and alternative hypothesis, find the p-value, state your conclusion, and identify the Type I and Type II errors.
- The mean age of a bus driver in Chicago is 47.4 years. If a hypothesis test is performed to test the validity of this statement, how should you interpret a decision that rejects the null hypothesis?The designer of an SAT prep course wants to test whether persons who take the course increase their SAT scores, on average. To do so, the founder selects a random sample of course takers and compares their SAT scores from before taking the course to their SAT scores after taking the course. Which situation below would represent a Type Il Error for the associated test of hypotheses?A newsletter publisher believes that less than 50% of their readers own a laptop. For marketing purposes, a potential advertiser wants to confirm this claim. After performing a test at the 0.05 level of significance, the advertiser decides to reject the null hypothesis. What is the conclusion regarding the publisher's claim?