To estimate the percentage of defects in a recent manufacturing batch, a quality control manager at Toyota selects every 19th car that comes off the assembly line starting with the fifth until she obtains a sample of 110 cars. ..... What type of sampling is used? O A. Stratified O B. Convenience O C. Cluster O D. Simple random O E. Systematic

The drying times of a certain type of new paint are known to follow normal distribution with mean u = 75 mins and standard deviation o = additive to shorten the drying time. It is believed that with this new addition, the drying times are still normally distributed with the same variance but with a smaller mean parameter u. One is therefore interested in testing Ho u = 75 versus H1: u 0. = 68? thution on 0A)

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