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1. Mr. Doodle's grade distribution over the past 3 years for a course in college algebra is shown in the chart below.
Grade NumberA 45B 180C 110D 95F 65I 5 If Jane plans to take a college algebra course with Mr. Doodle, determine the empirical probability that she receives at least a B. 2. The theoretical probability of undesirable side effects resulting from taking Grebex is 2 in 13. If 260 people take Grebex to lower their blood pressure, how many will encounter undesirable side effects? 0.5 0.25 0.33 1.5 0.67 3. One card is selected at random from a deck of cards. Determine the probability that the card is a red 10. 1/12 1/26 2/13 3/13 1/13 4. The odds against Lounging Larry winning the horse race are 5:8. Determine the probability that Lounging Larry wins the horse race. 5/8 8/13 5/13 8/5 13/5 5. In a multiple-choice test, each question has five options. Students will get 3 points for each correct answer; lose 1 point for each incorrect answer; and receive no points for unanswered questions. A student does not know the correct answer for one question. Is it to her advantage or disadvantage to guess an answer? Show your calculations for expected value. Show your work for full credit. 6. One thousand raffle tickets are sold for $1.00 each. One grand prize of $200 and two consolation prizes of $50 each will be awarded. Jeremy purchases one ticket. Find his expected value. Show your work for full credit. 7. A person spins the pointer and is awarded the amount indicated by the pointer. It costs $6 to play the game. Determine:
• The expectation of a person who plays the game. • The fair price to play the game.
Standard deviation of $5,000. What is the lowest salary for those individuals with an MBA degree whose starting salary is in the top 10 percent?
we roll a fair die repeatedly until we see the number 4 appear and then we stop. find the probability that we needed an
Use the table to determine whether the correlations are significant and how you would interpret the results. The correlation between speed and strength for 20 women is .567. Test these results at the .01 level using a one-tailed test.
Determine a 95% confidence interval for the mean efficiency of a given batch of motors. If we want to cut the confidence interval by 1/3, how many motors should be tested?
We are intersted in the number of students who prefer brand C cola. identify the distribution of the random variable and the mean,standard deviation.
motorola used the normal distribution to determine the probability of defects and the number of defects expected in a
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
let the experiment be the toss of three dice in a row.let x be the outcome of the 1st die.let y be the outcome of the
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
5 of which are built to metric standards and 7 of which are built to english standards. What is the probability that out of 3 taken, at least one is english standard engine?
A coin is tossed 100 times. The difference "number of heads - number of tails" is like the sum of 100 draws from one of the following boxes. which one, and why?
conduct the hypothesis test and prove the test statistic critical value and p-value and state the conclusion.a package
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