A local ice cream shop hand scoops each of its ice cream cones.The cones vary in weight from 140 grams to 305 grams with a mean of 181 grams and a standard deviation of 34 grams.The quartiles and median weights are 148,246,and 202 grams.Find the range and IQR of the weights.

A) Range: 41 grams; IQR: 53 grams
B) Range: 98 grams; IQR: 165 grams
C) Range: 445 grams; IQR: 98 grams
D) Range: 41 grams; IQR: 165 grams
E) Range: 165 grams; IQR: 98 grams

In examining the relationship between variables, the question "Should I portray the relationship between variables with a line or a curve?" pertains PRIMARILY to the ______ of the relationship.

A) direction
B) nature
C) strength
D) negativity

What type of research compares naturally formed or preexisting groups rather than employing random assignment to conditions?

A) quasi-experimental research
B) survey research
C) observational research
D) archival research

All of the following are reasons why random sampling is important for statistical applications except ________.

A) the outcomes are more readily understood and therefore really usable
B) solving using mathematics alone may be very difficult if not impossible
C) the outcome variables are complicated functions of several input random variables
D) sampling experiments can be used to better understand important statistics theories

When data points group together in a cluster from the upper left-hand side of the xy axis to the lower right-hand side,what is this?

A) negative slope
B) positive slope
C) positive intercept
D) negative intercept