Question 1 (1 point) Since a sample is a subset of the population, the sample mean O is always smaller than the mean of the population. 0 is always larger than the mean of the population. 0 must be equal to the mean of the population. 0 can be larger, smaller, or equal to the mean of the population. Question 2 (1 point) Suppose the distribution of daily changes in stock prices is bell shaped with a mean of 1% and a standard deviation of 3%. Price changes can be positive or negative. By the Empirical Rule, we should expect that 95% of the time, changes should be between O 2% and 4%. O -2% and +4%. 0 1% and 5%. O '5% 311d 70/0. Question 3 (1 point) The presence of a few large outliers will 0 Increase the standard deviation but not the mean. 0 Increase the mean but not the median. 0 Increase the mean but not the standard deviation. 0 Increase the median but not the standard deviation. Question 4 (1 point) A frequency distribution is a tabular summary of a set of data showing the frequency of items in each of 0 several nonoverlapping classes. 0 a graphical form of representing data. 0 a graphical device for presenting categorical data. 0 a tabular summary of a set of data showing the relative frequency. Question 5 (1 point) A histogram is O the history of the data elements. 0 a column chart of the frequencies or relative frequencies. 0 a table of the percentage of values in each group. a graphical method for presenting a cumulative frequency or a cumulative relative 0 frequency distribution. Question 6 (1 point) A Table in Excel is a useful way to do an initial exploration of the data because 0 You can quickly discover whether there are outliers. Q You can ascertain whether there are a significant number of missing values. 0 You can identify if there are data issues that may require "cleaning". 0 All of the above. Question 7 (1 point) The Standard Error is a measure of O The variability of estimates of the sample standard deviation of a variable. O The variability in data values of a variable. O The variability in estimates of the sample mean of a variable. O All of the above. Question 8 (1 point) It the 90th percentile for a data set is 483, then 90% of values are greater than 483. The 90th smallest value is 483. 90% of the values are less than 483. 0000 The 90th largest value in the data set is 483. Question 9 (1 point) For the distribution 100 50 0 982928288 130 140 150 110 120 100 O The mean is greater than the median. The mean is less than the median. The mean and median are approximately the same. We cannot tell which of the mean or median is greater.Question 10 (1 point) In grouping data to construct a frequency distribution, the grouping should 0 use equal width groups, wit only the first and last groups possibly being different. O Use as many groups as necessary to show the variability in the data, but not too many. O Include all of the data. O All of the above