1a. If the parameter is 5.5, which sampling distribution are unbiased? Why? 1b. Which of the sampling distributions is the best estimator of the parameter? Why? 1c. Which of the choices has low variability and high bias? Why?

Q21. State whether each of the following variables is an example of an independent variable (1) or a quasi-independent variable (Q). Just say I or Q 1. Gender: Ethnicity: Exposure to supplements during the experiment: Environment of research setting: ii. iii. iv. V. Sexual orientation: vi. Physical activity: Q22. Below you have the age for 20 students at Higherove community. Complete the following: Construct a simple frequency distribution for grouped data; display your findings in a table (number of intervals should be 5) i. ii. iv. V. WINN Add a column to your table with the relative percent Add a column to your table with the cumulative percent (bottom up) Construct a histogram that distributes the intervals along the horizontal scale (x-axis) and list the frequency of scores in each interval on the vertical scale Construct a pie chart (when drawing the chart, you do not have to be very accurate in- terms of the angles) Grade 8 14 11 6 17 9 14 19 15 10 15 12 0 16 13 24 8 10 14 7 X

When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume that those four outcomes are equally likely. Construct a table that describes the sampling distribution of the sample proportion of girls from two births. Does the mean of the sample proportions equal the proportion of girls in two births? Does the result suggest that a sample proportion is an unbiased estimator of a 1 1 population proportion? For the entire population, assume the probability of having a boy is the probability of having a girl is, and this is not affected by how many boys or girls have previously been born. Determine the probabilities of each sample proportion. Sample proportion of girls ▼ ▼ ▼ Probability (Type integers or simplified fractions.)

O a. the OLS estimate of r is biased due to sample selection. O b.the OLS estimate of r is unbiased. Oc the error u is homoskedastic. O d. the OLS estimator is BLUE.