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- The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 313 yards. The probability the golf ball travels further than 322 yards is 0.13. Find the probability a randomly selected golf ball travels between 304 yards and 322 yards. Express the answer as a decimal value rounded to the nearest hundredth.Suppose that the number of hours that an adult watches in a day has a mean of 2.4 hours and a standard deviation of .7 hours. i. What is the probability that an adult watches more than 3.5 hours in a day?Calculate the z-score. Draw a diagram, Then find the probability.ii. What is the probability that a person watches between 2 and 3 hours of TV a day? Write the probability notation. Calculate the z-score. Draw a diagram. then you may find the probability.iii. What is the 40th percentile for the number of hours an adult watches TV in a day?The maternity ward at a certain hospital in a certain country in Africa is one of the busiest in the world with an average of 60 births per day. Let X= the number of births in an hour. Find the mean and standard deviation of X. What is the probability that the maternity ward will deliver three babies in one hour? What is the probability that the maternity ward will deliver at most three babies in one hour? What is the probability that the maternity ward will deliver more than five babies in one hour?
- 1, the mean number of goldfish in the package is 187. find the probability of choosing a package with 147 or more goldfish. 2, Michael Jordan made 83.5% of his free throws for every 200 free throws. find the mean number of free throws made and the standard deviation.Erla rolls six sided dice 15 times. What is the standard deviation of the number of sixes that occur?The Powerball lottery jackpot has a winning probability of 1/189,000,000. If you only consider the options of winning the jackpot ($100,000,000) or losing, what the is the mean value of a ticket that costs $2 to buy? At what point does the mean value of a ticket become positive?
- I need to find the indicated probability for a Mean of 24, an SD of 4.2. P(x > 30)The proportion of a in the tail of a gold distribution can be never be more than .50 true or falseA dice is rolled three times a. Find the probability of getting exactly 2 fours b. Find the mean, variance, and standard deviation
- Dandelions are studied for their effects on crop production and lawn growth. In one region, the mean number of dandelions per square meter was found to be 8.5. Find the probability of no dandelions in an area of 1 m2. P(X = 0) = Find the probability of at least one dandelion in an area of 1 m2. P(at least one) = Find the probability of at most two dandelions in an area of 1 m2. P(X < 2) =A professor knows that her statistics students' final exam scores have a mean of 79 and a standard deviation of 12.4. In his class, an "A" is any exam score of 90 or higher. This quarter she has 25 students in her class. What is the probability that 7 students or more will score an "A" on the final exam?You play a game of chance that you can either win or lose (there are no other possibilities) until you lose. Your probability of losing is p = 0.61. What is the probability that ita. takes 2 games until you lose. b. takes 5 games until you lose. c. Find the mean c. Find the standard deviation.
