Two data sets have the same mean, but Set A has standard deviation $3$ and Set B has standard deviation $12$. What is true?

Set B's values are more spread out

A line of best fit is $y = 7x + 40$ for hours studied versus score. What does the slope mean?

Each extra hour is associated with about 7 more points

A strong negative linear relationship

A lurking variable like hot weather likely drives both

12questions. Pick an answer and you'll see why right away.

A box plot has minimum $5$ , $Q_1 = 12$ , median $18$ , $Q_3 = 28$ , maximum $40$ . What is the interquartile range?
What is the median of the data set $3, 7, 8, 10, 95$ ?
A histogram has a long tail stretching toward the lower values on the left. The distribution is:
Two data sets have the same mean, but Set A has standard deviation $3$ and Set B has standard deviation $12$ . What is true?
In a two-way table, $50$ students are surveyed; $30$ play sports and $18$ of those also have a job. What fraction of athletes have a job?
A marginal frequency in a two-way table is found where?
A scatter plot shows points trending downward to the right, tightly clustered. The association is:
A line of best fit is $y = 7x + 40$ for hours studied versus score. What does the slope mean?
Using the model $y = 7x + 40$ , what is the predicted score for $6$ hours of study?
A data set has correlation coefficient $r = -0.88$ . This indicates:
Ice cream sales and drowning incidents are strongly correlated. Which conclusion is valid?
Which statistics best describe a strongly skewed data set with an outlier?