stat online test _ need answers now asap
1.The college student senate is sponsoring a spring break Caribbean cruise raffle. The proceeds are to be donated to the Samaritan Center for the Homeless. A local travel agency donated the cruise, valued at $2000. The students sold 2765 raffle tickets at $5 per ticket.
(a) Kevin bought twenty-two tickets. What is the probability that Kevin will win the spring break cruise to the Caribbean? (Round your answer to five decimal places.)
What is the probability that Kevin will not win the cruise? (Round your answer to five decimal places.)
(b) Expected earnings can be found by multiplying the value of the cruise by the probability that Kevin will win. What are Kevin’s expected earnings? (Round your answer to two decimal places.)
Is this more or less than the amount Kevin paid for the twenty-two tickets?
How much did Kevin effectively contriute to the Samaritan Center for the Homeless? (Round your answer to two decimal places.)
2. The college hiking club is having a fund raiser to buy new equipment for fall and winter outings. The club is selling Chinese fortune cookies at a price of $1 per cookie. Each cookie contains a piece of paper with a different number written on it. A random drawing will determine which number is the winner of the dinner for two at a local Chinese restaurant. The dinner is valued at $35. Since the fortune cookies were donated to the club, we can ignore the cost of the cookies. The club sold 680 cookies before the drawing.
(a) Lisa bought 21 cookies. What is the probability she will win the dinner for two? (Round your answer to three decimal places.)
What is the probability she will not win? (Round your answer to three decimal places.)
(b) Lisa’s expected earnings can be found by multiplying the value of the dinner by the probability that she will win. What are Lisa’s expected earnings? (Round your answer to two decimal places.)
How much did she effectively contribute to the hiking club? (Round your answer to two decimal places.)
3. The college Physical Education Department offered an Advanced First Aid course last summer. The scores on the comprehensive final exam were normally distributed, and the zscores for some of the students are shown below.
| Robert, 1.22 | Juan, 1.62 | Susan, –1.85 |
| Joel, 0.00 | Jan, –0.82 | Linda, 1.73 |
(a) Which of these students scored above the mean? (Select all that apply.)
(b) Which of these students scored on the mean? (Select all that apply.)
(c) Which of these students scored below the mean? (Select all that apply.)
(d) If the mean score was
μ = 156
σ = 24,
| Robert | |
| Joel | |
| Jan | |
| Juan | |
| Susan | |
| Linda |
