Arepeated-measures study using a sample of n = 20 participants would produce a t statistic with df of what?

Use set builder notation to represent the following set: { -3, -2, -1, 0}

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%