Can I please get this in 30 mins?

1. (20 pts.) A recent poll found that 225 of a random sample of 400 adults said that they believe in extrasensory perception. a. Find a 90% confidence interval for the true proportion of adults who believe in extra sensory perception. b. What is the point estimate? c. What is the margin of error? 2. (20 pts.) In theory, in 18 cases out of 20, the overall result of 45% will differ no more than six percentage points in either direction from what would have been obtained by asking everyone in the population. a. Write this confidence interval in interval form. b. Identify the confidence level. c. Identify the margin of error. d. Identify the point estimate. 3. (20 pts.) A pet products company is trying to determine the mean weight for a particular breed of dogs. They weigh 64 dogs and find a mean weight of 38.6 pounds and a sample standard deviation of 1.8 pounds. a. Construct a 90% confidence interval for the mean weight of this breed? b. What is the point estimate? c. What is the margin of error? 4. (20 pts.) To examine the effects of the work environment on attitude toward work, a psychologist randomly assigns a random group of 18 recently hired reception trainees to three "home rooms" - six trainees per room. Each room is identical except for wall color. One is light green, another is light blue, and the third is light yellow. During the week-long training program, the trainees stay mainly in their respective home rooms. At the end of the program, an attitude scale is used to measure each trainee's attitude toward work (a low score indicates a poor attitude, a high score a good attitude). a. Was this an observation study or an experiment? How are you deciding? b. Did the study involve random sampling? c. Did the study involve random assignment? d. Will a cause-and effect conclusion be possible? Why or Why not