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 first five answers as a decimal and round to the nearest 0.001 (in other words, type 0.123, not 12.3% or 0.123456). What fraction of survey respondents identified themselves as affiliated with neither party? What fraction of survey respondents thought the economy was about the same? What fraction of those affiliated with neither party thought the economy was about the same? Among survey respondents who thought the economy was about the same, what fraction were affiliated with neither party? What fraction of survey respondents were affiliated with neither party who thought the economy was about the same?

Twenty-nine college students, identified as having a positive attitude about Mitt Romney as compared to Barack Obama in the 2012 presidential election, were asked to rate how trustworthy the face of Mitt Romney appeared, as represented in their mental image of Mitt Romney’s face. Ratings were on a scale of 0 to 7, with 0 being “not at all trustworthy” and 7 being “extremely trustworthy.” Here are the 29 ratings:  2.6 3.2 3.7 3.3 3.4 3.6 3.7 3.8 3.9 4.1 4.2 4.9 5.7 4.2 3.9 3.2 4.5 5.0 5.0 4.6 4.6 3.9 3.9 5.3 2.8 2.6 3.0 3.3 3.7   a 95% confidence interval for the mean rating. Is there significant evidence at the 5% level that the mean rating is greater than 3.5 (a neutral rating)?

Each person in a representative sample of 449 college students age 18 to 24 was classified according to age and to the response to the following question: "How often have you used a credit card to buy items knowing you wouldn't have money to pay the bill when it arrived?" Possible responses were never, rarely, sometimes, or frequently. The responses are summarized in the table. Age 18 to 20 Age 21 to 22 Age 23 to 24 Never 73 62 29 Rarely 38 34 32 Sometimes 30 42 40 Frequently 13 24 A USE SALT Do these data provide evidence that there is an association between age group and the response to the question? Test the relevant hypotheses using a = 0.01. State the appropriate null and alternative hypotheses. O H: The proportions falling into each of the three age groups are not the same for all four responses to the question. H: The proportions falling into each of the three age groups are the same for all four responses to the question. O Hg: The proportions falling into each of the three age…

An advertising company is comparing published listening figures for different radio stations and podcasts in order to decide where is the best place to put their adverts. The audience figures for the last 20 quarters of radio stations A and B are in Table 1. Table 1 Audience figures in 100 000s of radio stations A and B for the last 20 quarters. Radio Station A Radio Station B 112 106 108 113 111 109 108 112 115 115 118 114 116 115 113 103 107 105 103 106 98 101 100 99 100 99 100 98 96 97 98 87 88 92 98 99 96 102 104 100

Martin collected data from students about whether they played a musical instrument. The table shows his results. Instrument No Instrument TOTAL Вoys 40 68 108 Girls 46 84 TOTAL 86 106 192 Of the students surveyed, how many played an instrument? The number of students surveyed who played an instrument is [

Psychologists have been investigating the differences between people with at least one brother or sister and those with none. In a letter to the New England Jounal of Medicine,  researchers announced  the results of a survey of 472 adults in Buffalo, New York. The experiment recorded whether the respondent suffered from hypertension and whether she or he had siblings. The data were summarized as shown bellow;     SIBLING NO SIBLING TOTAL Suffer from hypertention 79 39 118 Do not suffer from hypertension 262 92 354 TOTAL 341 131 472   REQUIRED Do these data allow us to conclude at the 5% significance level that adults with no siblings suffer  different rates of hypertension than those with siblings?

A survey of 1687 adults nationwide asked, "What irks you most about the actions of other motorists?" The response "tailgaters" was given by 483 people. What percent of those surveyed were most irked by tailgaters?