Gaining admittance into medical school is a difficult task. Researchers want to know if more students who complete a graduate degree gain admission into medical school than those who do not. They compare the number of students who were admitted who had a master’s degree with those who did not. A detailed analysis of the data is carried out to arrive at a conclusion.

What type of a research study is this?

a survey
an experiment
an observational study
a controlled study

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

What number is 7 units left of -15?