1. Interpret the results of the studies below. a) A study was run to estimate the...

1. Interpret the results of the studies below.

a) A study was run to estimate the difference between UC students and CSU students in the proportion that work full-time. A random sample of 200 UC students had 42 that worked full-time. A random sample of 300 CSU students had 96 that worked full-time. Researchers found a 95% confidence interval of -0.187<P_UC-P_CSU<-0.033.

b) A study was run to determine if a new machine at a factory was less likely to produce flawed products than the old machine. A random sample of 200 products from the old machine had 11 flawed. A random sample of 200 products from the new machine had 9 flawed. Researchers set a significance level of 5% and found a p-value of 0.179.

2. Newborn males have a mean length of 49.9cm with a standard deviation of 1.9cm. Researchers plan to take a random sample of 50 newborn males. Find the shape, center, and spread for the sampling distribution.

Expert Solution

orchestra answered 1 year ago

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