Dear Sir or Madam,

I am working out the following questions and my calculation show the below answers. I am have used the examples that was given in the textbook along with table. However I am unsure of these answers; statistics is not my expertise. Could you please review these questions and give detail explanations?

(Answer)

For question 4 I got (A. 2.5)

For question 15 if I got (A. 1.14)

For question 18 is I got (A. 0.817)

4. A random sample of 40 hotel reviews is drawn from a large population of hotel customers. It's known that 30% of the population left the hotel 1 star, 20% left 2 stars, 20% left 3 stars, and 30% left 4 stars. Give the hotel's average star rating. 0 A.2.5 O 3.3 O 0.2 O D.3.5 15. Consider an experiment that results in a positive outcome with probability 0.38 and a negative outcome with probability 0.62. Create a new experiment consisting of repeating the original experiment 3 times. Assume each repetition is independent of the others. What's the probability of three successes? G) A. 1.14 O B. 0.055 O C. 0.238 O D. 0162 18. Each football game begins with a coin toss in the presence of the captains from the two opposing teams. {The winner of the toss has the choice of goals or of kicking or receiving the first kickoff.) A particular football team is scheduled to playr 1D games this season. Let x = the number of coin tosses that the team captain wins during the season. Using the appropriate table in your textbook, solve for H4 5 x 5 8]. O A.O.817 O B. 0.759 O 0.0.815 O c.0191