Compute a 90% t-confidence interval for the mean reaction time measurement for participants in each of these three groups. (You should find three separate confidence intervals.) For your computations in Python make sure that you do not use canned functions. Use the CI formulas given in lecture and show your steps. Print each CI to the screen. Can you make any conclusions regarding whether coffee, naps or both (coffee-naps) are better for faster reaction times

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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.

Ithink i know it but i want to be sure so can you me out ?