Brown school students had a mean of 78 and a standard deviation of 12. 36 students from another school to the test and their mean score was 85. calculate the standard deviation error of the mean (sem)? after calculating the stem, create a 95 confidence interval

Which best explains why this triangle is or is not a right triangle?

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?