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The amount of time required for each of 100 mice to navigate through a maze was recorded.  The histogram below shows the distribution of times, in seconds, for the 100 mice.   Which of the following values is the best estimate of the standard deviation of the 100 times?

The graph below shows the number of state representatives from each of two political parties after three elections. Which of the following statements is (are) true? In 2014, Party B had twice as many representative as Party A. In 2018, Party A had twice as many representatives as Party B. Party A’s share of the total number of representatives increased steadily from 2014 to 2018.

The contingency table below shows how 223 college students are classified according to Birth Order and College Major. Birth Order TOTAL 1st 2nd 3rd 4th + College Major Math/Science 34 14 6 3 57 Agriculture 52 27 5 9 93 Humanities 15 17 8 3 43 Other 12 11 1 6 30 TOTAL 113 69 20 21 223 Note:  Birth Order = 1st means oldest or only child. Approximately, what percent of Math/Science majors are 1st Born?

A student obtains a raw score of 23 in a moderately skewed (asymmetrical) distribution of test scores with a median of 23.  What would be the student’s score in standard units (z-score)?

Determine the hybridization of the carbons labeled 2 and 6.

How many nonpolar bonds does CH3F contain?

Which resonance form is likely to contribute most to the correct structure of OCN-?

Match the following types of encoding to their definitions. 

In the following example, what type of learning or conditioning is being described? A famous influencer is seen at a large gathering. Half of her supporters do not like that she attended this event, so they decide to unfollow her and “cancel” her. Many posts are made about her convincing others to unfollow her as well. You decide that you do not want to be in this situation. 

Has innate reinforcing qualities. These are your basic necessities, like food, water, and shelter.