MAP4C - Chapter 3 Statistics

If the correlation coefficient is negative, the correlation is weak.

Is there a relationship between the number of newspapers sold and the rainfall each day?

A line-of-best-fit for some data is y=0.25x+5. If x goes up by 4, by how much does y go up?

If the slope of the line-of-best-fit is negative, the correlation coefficient must be negative?

A study shows as TV price increases, the number sold decreases. TV price is the _____ variable.

What is the error in regression (line-of-best-fit) for this set of data?

What correlation coefficient (r-value) could apply to this data?

The best way to display two-variable data is:

What r-value could apply to this data?

Sam surveys students and concludes a drop in grades causes an increase in part-time job hours.

Tim surveys 4 students and concludes more sleep causes higher grades. What is his mistake?

Is there a relationship between the temperature and the number of people at the swimming pool?

In the equation of the line-of-best-fit y=9x-2, the slope is ____ and the y-intercept is ____.

Juan collected data on the colours of cars passing the school. This data is known as:

The researcher concludes that increasing the dose decreases the incidents of heartburn.

Which descriptive statement is UNTRUE for this data set?

Which statement best describes the correlation?

The correlation coefficient is a measure of:

Sam surveys two-hundred 20-33 year olds and concludes income increases with age for all ages.