Use this symbolization key: M: Kate is in a meeting.C: Amy is having coffee. and select the correct symbolization for this sentence: It is not the case that either Kate is in a meeting or Amy is having coffee. (‘~’ is used here instead of ‘¬’.)

Use this symbolization key to translate the sentence below. S: Sam is eating lunch.J: Jack is reading a book.K: Kate is fishing. If it is not the case that Jack is reading a book, then Kate is not fishing.

Use this symbolization key: E: The envelope is hidden in the drawer.M: Miguel is in the safe house.N: Nicole is at the train station. and select the correct symbolization for this sentence: Either Miguel is in the safe house, or both Nicole is at the train station and the envelope is hidden in the drawer.

Use this symbolization key to translate the sentence below. G: The green van is behind the building.N: Nicole is at the train station.D: David is in Portugal. Either the green van is behind the building and Nicole is at the train station, or the green van is not behind the building and David is in Portugal.

What is the main logical operator in this TFL sentence? ~(((P & Q) ∨ R) → T)

What is the main logical operator in this TFL sentence? ((~E v F) -> ~G)

In the graph below, which distribution shows the smallest standard deviation? (Note: line weight / color is used to help distinguish the distributions only)

Suppose there is a population of test scores on a large standardized exam for which the true mean and standard deviation are unknown. Two different random samples of 50 data values are taken from the population. One sample has a larger sample standard deviation than the other. Each of the samples is used to construct a 95% confidence interval. How do you think these two confidence intervals would compare? 

For the past 100 years, the average high temperature on October 1 is 78

A charge of $$+3.0\ \mu\mathrm{C}$$ experiences a force of $$0.060\ \mathrm{N}$$ in an electric field. What is the magnitude of the electric field?