This is statistics course and I need help with answering those questions. Thank you
D Question 24 1 pts The table below shows the birth rate and per capita income for 20 countries in 1950. What is the equation of the least squares regression line for this data? Birth Rate Per Capita Income Venezuela 46.4 392 Mexico 45.7 118 Ecuador 45.3 44 Colombia 38.6 158 Puerto Rico 35.0 374 Chile 34.0 187 Canada 28.3 993 United States 24.7 1723 Argentina 24.7 287 Australia 22.7 885 Philippines 21.3 48 Ireland 21.2 572 Japan 20.8 239 Spain 20.3 244 France 18.9 472 Greece 18.8 134 Italy 18.0 295 England 15.3 901 Sweden 15.0 910 Austria 14.8 556 data source: http:/www.stat.ufl.edu/-winner/data/birthrate.dat O y - 825.993 + 13.19x O y - 13.19 + 825.993x O y - 13.19x O y = 825.993 - 13.19x Oy= 13.19 - 825.993xD Question 25 1 pts An analyst with the Texas Department of Transportation is interested in measuring the effects of a new seatbelt law on Texas drivers. Specifically, they want to know whether people are wearing their seatbelts more as a result of the new law. A team of data collectors are assigned to wait at random locations on streets and highways across the state, and count the number of seatbelt wearers and non-seatbelt wearers. Assume suburban streets, rural highways, and major interstates are equally represented, and data collectors count every driver that passes by. What method of data collection is being used? A cluster sample O A Simple Random Sample (SRS) O A census A randomized experiment An observational studyD Question 26 1 pts The average American newborn baby weighs 7.5 lbs. A simple random sample of 100 births occurring within the past 6 months at hospitals across the nation has a mean weight of 7.8 lbs. Can we conclude that American babies are getting bigger, on average? Choose the best possible answer. No, there will be undercoverage bias because babies not born at hospitals will not be represented. No, the difference between sample and population means is likely a result of normal sampling error. Yes, the sample is random and representative of all newborn babies in the nation. No, there is likely a confounding variable, such as the height of the parents, or the mother's diet. No, this is a sample of convenience since the study used a dataset that was already on hand.D Question 27 1 pts A study is conducted in a mall to determine the satisfaction of mall shoppers with the variety of stores available. A small kiosk is set up and staffed with an attendant who will ask people to complete a short questionnaire about each of the stores in the mall. The attendant and kiosk will remain at a central location in the mall for two weeks to collect questionnaires. From the questionnaires collected, 100 will be chosen at random to estimate the average level of satisfaction with the mix of stores in the mall. Based on what you know about this study, which of the following is likely to be a source of bias? O Judgmental sampling Volunteer samples Nonresponse bias Nonrandom sampling O Response Bias
