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Of 357 randomly selected medical students, 30 said that they planned to work in a rural community. Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community.
Statistics and Probability, Statistics
1. Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an ...
When Alice spends the day with the babysitter, there is a 0.5 chance she turns on the TV and watches a show. Her little sister Betty cannot turn on the TV by herself. But once the TV is on, Betty watches with probability ...
Assumes the following probability" P(customer make a purchase) = 0.300 P(Customer does not make a purchase) = 1-0.300 Compute the P(1purchase) and enter your answer in 3 decimal places.
Two people agree to meet at a coffee shop. They each independently pick a random moment in time between 8 a.m. and 9 a.m. and show up exactly at their selected time. But they are very impatient, and only stay for 10 minu ...
A researcher wants to determine if lead levels are different between the top of a glass of water and the bottom of a glass of water. Many samples of water are taken. From half, the lead level at the top is measured and f ...
The random variable X takes on the values 5, 20, 30, and 200 with probabilites 0.60, 0.30, 0.08, and 0.02 respectively. Use the statistical capacity of your calculator to find the expected value of X rounded to one p ...
Monthly water bills for a city have a mean of $108.43 and a standard deviation of $36.98. Find the probability that a randomly selected bill will have an amount greater than $165, which the city believes might indicate t ...
Hardboard is graded with the following frequencies: Grade A: 1/5 Grade B: 3/4 Cull: 1/20 If six pieces come off of a hot press, find the probability that two are Grade A, three are Grade B, and one is a Cull.
The weight of the eggs produced by a certain breed of hen has an unknown distribution with a mean of 65 grams and a standard deviation of 5 grams. If you purchase 144 eggs, what is the approximate probability that the av ...
A doctor whats to exam prior medical records in an attempt to estimate the proportion of juvenile valley fever cases that escalated to spinal meningitis. He wants to estimate the proportion within 2% with 98% certainty. ...
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