OCD

The distribution of age for players of a certain professional sport is strongly skewed to the right with mean 26.8 years and a standard deviation 4.2 years.  Consider a random sample of 4 players and a different random sample of 50 players from the population. Which of the following statements is true about the sampling distributions of the sample mean ages for sample of size 4 and samples of size 50?

A national news outlet conducted a survey about preferred methods for learning about current events.  A random sample of 1,605 residents living in Washington was selected, and 16.2 percent of the residents in the sample reported that social media was their preferred method.  Which of the following is an appropriate margin of error for a 90 percent confidence interval to estimate the population proportion of all residents living in Washington who would report that social media is their preferred method for learning about current events?

Match the folowwing chemicals and DNA mutations. Each option can only be used once. 

Pair the correct enzyme with the DNA repair process. Each option can only be used once. 

A significance test allows you to reject a hypothesis, ,  in favor of an alternative, , at the 5% level of significance.  What can you say about significance at the 1% level?

A video game company wants to estimate the mean time, in seconds, it takes a customer to download the new update of their latest video game.  Their lead programmer, Carla, creates a 90% confidence interval of (289.0, 308.0) to estimate the mean time, in seconds, it takes all customers to download the new update of their latest video game.  She would like to construct the confidence interval at the 95 percent level of confidence. Which of the following statements will be correct for the 95 percent confidence interval.

A farm produces thousands of 1-pound packages of cheese every month.  Administrative specifications allow for no more than 3 percent of the 1-pound packages to be underweight.  To investigate compliance with the specifications, the farm’s manager selected a random sample of 500 packages of cheese produced in one month and found 20 packages, or 4 percent, to be underweight.  Assuming all conditions for inference are met, do the data provide convincing statistical evidence at the significance level of that more than 3 percent of all the packages of cheese produced in one week are underweight?

Mismatch repair

Which of the following is true.