Agallup survey of 1,001 randomly selected u. s. adults conducted may 2011 asked, "in your opinion, which one of the following is the main reason why students get education beyond high school? " fifty three percent chose "to earn more money." based on these data, i found the 95% confidence interval for the proportion of u. s. adults who choose "to earn more money" to be (0.499, 0.561). which of the following is a valid statement?
a. true or false? a 95% confidence interval based on these altered data would be narrower, because a larger sample size increases confidence, which in turn makes the interval narrower. b. true or false? a 95% confidence interval based on these altered data would be narrower, because a larger sample size decreases the variability of the statistic. c. true or false? a 95% confidence interval based on these altered data would be wider, because a larger sample size increases confidence, which in turn makes the interval wider. d. true or false? a 95% confidence interval based on these altered data would be wider, because a larger sample size increases the variability of the statistic.

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

Describe how the presence of possible outliers might be identified on the following. (a) histograms gap between the first bar and the rest of bars or between the last bar and the rest of bars large group of bars to the left or right of a gap higher center bar than surrounding bars gap around the center of the histogram higher far left or right bar than surrounding bars (b) dotplots large gap around the center of the data large gap between data on the far left side or the far right side and the rest of the data large groups of data to the left or right of a gap large group of data in the center of the dotplot large group of data on the left or right of the dotplot (c) stem-and-leaf displays several empty stems in the center of the stem-and-leaf display large group of data in stems on one of the far sides of the stem-and-leaf display large group of data near a gap several empty stems after stem including the lowest values or before stem including the highest values large group of data in the center stems (d) box-and-whisker plots data within the fences placed at q1 â’ 1.5(iqr) and at q3 + 1.5(iqr) data beyond the fences placed at q1 â’ 2(iqr) and at q3 + 2(iqr) data within the fences placed at q1 â’ 2(iqr) and at q3 + 2(iqr) data beyond the fences placed at q1 â’ 1.5(iqr) and at q3 + 1.5(iqr) data beyond the fences placed at q1 â’ 1(iqr) and at q3 + 1(iqr)

Which equation represents the function on the graph?