What developmental theorist described the concept “teachable moments” as ideal periods in which an individual demonstrates a maturity level that is conducive to learning and achieving developmental tasks? 

Who championed person-centered theory?

In a certain population, 87% of the people own a car. If a random sample of 200 people is taken from this population,  a) find the expected number in this sample who own a car b) find the standard deviation of the distribution of people who own a car SHOW YOUR FORMULAS AND YOUR WORK! This is a binomial distribution problem so you can find the 2 formulas in that unit, Lesson 5.

A data set is normally distributed and has a mean of 45 and standard deviation of 3. According to the Empirical Rule, 68% of the data is between:

The median  of the data set {1, 3, 4, 6, 6, 6, 8, 8, 8, 9} is:

The median of the data set {10, 14, 16, 20, 27} is:

In a class of 60 people, 35 are 1st year students and 25 are 2nd year students. Calculate the percent of the class who are 1st year students and the percent who are 2nd year students. Show your work. Round your answers to the nearest percent.

In a binomial distribution with sample size 20 and probability of success of .67, if you want to find the probability of 12 successes, you would calculate:

In statistics, a population does not always consist of people.

A bowl has 15 marbles. 6 are red, 5 are blue, and 4 are yellow. a) If you pick one marble randomly, what is the probability it is red or blue? b) If you randomly pick two marbles in a row, WITH REPLACEMENT, what is the probability you pick two yellow ones in a row? c) If you randomly pick two marbles in a row, WITHOUT REPLACEMENT, what is the probability that you pick a blue one and then a yellow one? SHOW YOUR WORK!