A sample showed 36 people out of 60 said vanilla is their favorite yogurt flavor. Based on the sample, how many people out of 1,500 would be expected to pick vanilla as their favorite yogurt flavor

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?