A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below.   better same worse Republican 38 104 44 Democrat 12 87 137 none 21 90 118 Express your answers as a decimal and round to the nearest 0.001 (in other words, type 0.123, not 12.3% or 0.123456). If we randomly select one of the adults who participated in this study, compute: P(Democrat) = Correct P(same) = Incorrect P(same|Democrat) =  P(Democrat|same) =  P(Democrat and same) =

A CBS News poll conducted June 10 and 11, 2006, among a nationwide random sample of 651 adults, asked those adults about their party affiliation (Democrat, Republican or none) and their opinion of how the US economy was changing ("getting better," "getting worse" or "about the same"). The results are shown in the table below. better same worse Republican 38 104 44 Democrat 12 87 137 none 21 90 118 Express each of your answers as a percent rounded to the nearest tenth (for example, 12.3%). a. What percent of survey respondents identified themselves as affiliated with neither party (marginal probability)? b. What percent of survey respondents thought the economy was getting better and were affiliated with neither party (joint probability)? c. What percent of those affiliated with neither party thought the economy was getting better (conditional probability)?

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In politics, marketing, etc. we often want to estimate a percentage or proportion p. One calculation in statistical polling is the margin of error - the largest (reasonble) error that the poll could have. For example, a poll result of 72% with a margin of error of 4% indicates that p is most likely to be between 68% and 76% (72% minus 4% to 72% plus 4%).   In a (made-up) poll, the proportion of people who like dark chocolate more than milk chocolate was 39% with a margin of error of 1.3%. Describe the conclusion about p using an absolute value inequality.   The answer field below uses the symbolic entry option in Mobius. That lets you type in a vertical bar | to represent absolute values. Also, when you type in  <  and then =, the symbolic entry option will automatically convert that to  ≤ . In the same way, if you type in  >  and then =, the symbolic entry option will automatically convert that to  ≥.   Be sure to use decimal numbers in your answer (such as using 0.40 for 40%).

A poll was conducted on a representative sample of 600 adults living in the United States in order to investigate the decline in cable and satellite TV subscriptions. For this​ sample, 150 adults revealed that they are​ "cord cutters,"​ (that is, they canceled their​ cable/satellite TV service and now only use a video streaming​ service). You want to estimate​ p, the true proportion of all US adults who are​ "cord cutters." Complete parts a through e.       Question content area bottom Part 1 a. Find p​, the point estimate of p.   enter your response here

The table to the right shows data found at a government census​ website, under a​ "Did You​ Know" panel. What type of data source is the information presented here based​ on?   Private Sector Total Employment in a State All 2008 Q2 2009 Q2 Change Female 537,290 517,948 −3.6​% Male 504,214 477,491 −5.3​% Retail Trade       Female 168,942 146,473 −13.3​% Male 162,502 144,302 −11.2​%       Question content area bottom Part 1 Choose the correct answer below.     A. The information is the outcome of an experiment that was conducted.   B. The information is the result of an observational study that was conducted.   C. The information is the result of a survey that was conducted.   D. The information is collected via ongoing business activities.   E. The information is distributed by an organization or individual.

The following are (fictional) McDonald's service times (in seconds) for a random sample of drive-thru customers.  98  117  45  103  75  65  129  93  109  84  56  118 Calculate the median