Questions from Statistics

Q: Data were collected on calorie content in ales and IPAs and is

Data were collected on calorie content in ales and IPAs and is summarized in the following table. (Source: efficientdrinker.com) a. Does the sample data provide evidence that there is a difference in...

Q: Surfers and statistics students Rex Robinson and Sandy Hudson collected data on

Surfers and statistics students Rex Robinson and Sandy Hudson collected data on the number of days on which surfers surfed in the last month for 30 longboard (L) users and 30 shortboard (S) users. Tre...

Q: A random sample of students at Oxnard College reported what they believed

A random sample of students at Oxnard College reported what they believed to be their heights in inches. Then the students measured each others’ heights in centimeters, without shoes...

Q: Jacqueline Loya, a statistics student, asked students with jobs how

Jacqueline Loya, a statistics student, asked students with jobs how many times they went out to eat in the last week. There were 25 students who had part-time jobs, and 25 students who had full-time j...

Q: Heart rate data for a random sample of males and females was

Heart rate data for a random sample of males and females was obtained. The data are available at the text’s website. Use the data to answer these questions. Data were originally published in the Journ...

Q: A survey of asked respondents how long (in years) they

A survey of asked respondents how long (in years) they thought it would be before self-driving cars were the majority of vehicles on the road, and a random sample from this survey was selected. The da...

Q: The table summarizes the outcomes of a study that students carried out

The table summarizes the outcomes of a study that students carried out to determine whether humanities students had a higher mean grade point average (GPA) than science students. Identify both of the...

Q: There is a theory that relative finger length depends on testosterone level

There is a theory that relative finger length depends on testosterone level. The table shows a summary of the outcomes of an observational study that one of the authors carried out to determine whethe...

Q: Several times during the year, the U.S. Census

Several times during the year, the U.S. Census Bureau takes random samples from the population. One such survey is the American Community Survey. The most recent such survey, based on a large (several...

Q: A human resources manager for a large company takes a random sample

A human resources manager for a large company takes a random sample of 50 employees from the company database. She calculates the mean time that they have been employed. She records this value and the...