The stopping distance d of an automobile is directly proportional to the square of its speed s . On a road surface, a car requires $78$ feet to stop when its speed is $25$ miles per hour. The brakes are applied when the car is traveling at $30$ miles per hour under similar road conditions. Estimate the stopping distance to the nearest foot.

A) $123.5$ feet
B) $178.2$ feet
C) $112.3$ feet
D) $3.7$ feet
E) $101.1$ feet

Because of the greater uncertainty,the t-statistic will display greater ____________________ than the z-statistic.

In order to interpret the p-value associated with hypothesis testing about the population mean μ,it is necessary to know the value of the test statistic.