frisi wants to check the support of political parties in the Reykjavík area and decided to stand at the entrance of Kringlan one weekend and ask people what they are going to vote for. It was...

Extracted text: frisi wants to check the support of political parties in the Reykjavík area and decided to stand at the entrance of Kringlan one weekend and ask people what they are going to vote for. It was Kringlukast and a lot of good offers so many made their way there this weekend. Iris received a total of 834 answers to the question, what are you going to vote for in the upcoming election? "What is the main statistical problem with Iris' survey? 1. It is not corrected for placebo effect. 2. There is a risk of research bias in the survey. 3. There is a risk of sampling in the survey. 4. The number of participants is small and therefore the hypothesis tests that will be performed will have little strength. Assume that the time it takes to run the New Year's race follows a normal distribution with an average of 50 minutes and a standard deviation of 10 minutes. Questions 10 and 11 deal with the New Year's race. Question 10 Lalla sadly, runners who do not finish the race in less than 60 minutes feel poor. If Lalli chooses one runner at random, what is the probability that he is poor in Lalli's opinion? 1. about 1% 2. about 16% 3. about 23% 4. about 84% Question 11 How long can a runner be at the top to finish the race if he or she intends to be in the group of the 10% fastest runners? 1. 34.1 minutes. 2. 37.2 minutes. 3. 50 minutes. 4. 62.8 minutes.