Based on the 2000 Census, 31.8% of grandparents in California are the primary caregivers for their grand children. Suppose n = 1000 persons are to be sampled from this population and the sample proportion of grandparents as primary caregivers ( p ) is to be calculated. 6. (2pts) What is the mean of the sampling distribution of p? Answer A. 0.0002 B. 0.0147 C. 0.2169 D. 0.3180 7. (2 pts) What is the standard deviation of the sampling distribution of p ? Answer A. 0.0002 B. 0.0147 C. 0.2169 D. 0.3180 8. (2 pts) A sample of size 45 is drawn from a slightly skewed population distribution. What is the approximate shape of the sampling distribution? A. slightly skewed Answer B. normal C. uniform D. Cannot determine without a graph 9. (2 pts) A real estate agent is interested in how the selling price of a house is influenced by the amount of land the house is located on. She takes a random sample of 20 houses that have been within the last year and obtains the data needed for each house. If she wants to graph this data investigate the influence, she should use a (circle the best answer) a) clustered bar chart with amount of land on the horizontal axis. b) scatterplot, with amount of land on the horizontal axis. scatterplot, with selling price on the horizontal axis. d) Histogram 10. (2 pts) True or False. Suppose the correlation coefficient for 2 quantitative variables is zero. This means that th is no relationship of any kind between these two variables. 4