Questions from Statistics

Q: The mean age of all 118 used Toyota vans for sale (

The mean age of all 118 used Toyota vans for sale (see exercise 9.16) was 3.1 years with a standard deviation of 2.7 years. The distribution of ages is right skewed. For a statistics project, a studen...

Q: A penny was spun on a hard, flat surface 50 times

A penny was spun on a hard, flat surface 50 times, and the result was 15 heads and 35 tails. Using a chisquare test for goodness of fit, test the hypothesis that the coin is biased, using a 0.05 level...

Q: In 2018 Pew Research reported that 11% of Americans do not

In 2018 Pew Research reported that 11% of Americans do not use the Internet. Suppose in a random sample of 200 Americans, 26 reported not using the Internet. Using a chi-square test for goodness-of-fi...

Q: When playing Dreidel, (see photo) you sit in a

When playing Dreidel, (see photo) you sit in a circle with friends or relatives and take turns spinning a wobbly top (the dreidel). In the center of the circle is a pot of several foil-wrapped chocola...

Q: See exercise 10.21 for an explanation of playing with the

See exercise 10.21 for an explanation of playing with the dreidel. This time the family used a plastic dreidel and got the following outcomes. The four outcomes are believed to be equally likely (that...

Q: The table shows the results of rolling a six-sided die

The table shows the results of rolling a six-sided die 120 times. Test the hypothesis that the die is not fair. A fair die should produce equal numbers of each outcome. Use the four-step procedure wit...

Q: Professional musicians listened to five violins being played, without seeing the

Professional musicians listened to five violins being played, without seeing the instruments. One violin was a Stradivarius, and the other four were modern-day violins. When asked to pick the Stradiva...

Q: A 2017 study explored the impact of Yoga and Meditation based Lifestyle

A 2017 study explored the impact of Yoga and Meditation based Lifestyle Intervention (YMLI) on cellular aging in healthy individuals (Tohlahunase et al. 2017). Ninety-six healthy individuals were enro...

Q: Exercise 10.11 on artery disease in mummies indicated that 9

Exercise 10.11 on artery disease in mummies indicated that 9 out of 16 mummies showed heart disease (hardening of the arteries). Test the hypothesis that the population proportion of mummies with hard...

Q: A 2018 Pew Research poll asked a random sample of Millennials and

A 2018 Pew Research poll asked a random sample of Millennials and GenXers if they supported legalization of marijuana. Survey results found 70% of Millennials and 66% of GenXers supported marijuana le...