When Evelyn runs the 400 meter dash, her finishing times are normally distributed with a mean of 73 seconds and a standard deviation of 1.5 seconds. If Evelyn were to run 48 practice trials of the 400 meter dash, how many of those trials would be between 71 and 76 seconds, to the nearest whole number?
Statistics Calculator
Answer:
Submit Answer

Answer

Expert–verified

Hide Steps

Answer

Step 3: Multiply the probability by the number of trials

Steps

Step 1 ：Step 1: Find the z-scores for 71 and 76 seconds

Step 2 ：Step 2: Calculate the probability between the z-scores

Step 3 ：Step 3: Multiply the probability by the number of trials