In a tech company, the time it takes for 1 worker to build a PC is a random variable with an AVERAGE of 40 minutes. If a supervisor of a group of 20 workers with an average time to build a PC of 45 minutes and a standard deviation of 12.93, what percent of the workers would not meet the deadline? *
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- A random group of students was selected from a large student conference to analyze their class in school Is there evidence to reject the hypothesis that the number of students is equally distributed between the four classesat a = 0.05 ?According to a certain government agency for a large country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration (BAC) is 0.33.Suppose a random sample of 109 traffic fatalities in a certain region results in 47that involved a positive BAC. Does the sample evidence suggest that the region has a higher proportion of traffic fatalities involving a positive BAC than the country at the α=0.05 level of significance?For a population with σ = 10, how large a sample is necessary to have a standard error that is: Less than 5 points?