Blog

The cutoff weight for the lowest 20% of steer weights is ______________ pounds.

__________% of steers have weights below 1300 pounds.

The relative frequency for the “Subcompact and mini” car type is:  _____________

People with z-scores of 2.5 or above on a certain aptitude test are sometimes classified as geniuses. If aptitude test scores have a mean of 100 and a standard deviation of 26 points, what is the minimum aptitude test score needed to be considered a genius? Show your work.   The minimum aptitude test score needed to be considered a genius is __________ points.

The cutoff for the middle 40% of the steer weights are ___________ and ___________ pounds. Explain how you obtained your answer.

The cutoff weight for the highest 10% of steer weights is ______________ pounds.

__________% of steers have weights above 1050 pounds.

In what interval would you expect the central 95% of autos to be found? Using the 68 – 95 – 99.7 rule, the central 95% of autos can be expected to be found in the interval from ________________ to _______________.      (lower bound)    to   (upper bound) 

The sample mean is: ___________. Round to 3 decimal places (hundredths).

Approximately ________% of the vineyards have at or over 210 acres. (round to the nearest whole percent as needed).