Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 550.6. P(X > 550.6) =  Enter your answer as a number accurate to 4 decimal places. If 5 of the men are randomly selected, find the probability that their mean score is at least 550.6. P(M > 550.6) =  Enter your answer as a number accurate to 4 decimal places.

The life of light bulbs is distributed normally. The standard deviation of the lifetime is 25 hours and the mean lifetime of a bulb is 510 hours. Find the probability of a bulb lasting for at most 552 hours. Round your answer to four decimal places.

The NJ Department of Health has reported the average life span of NJ residents is 81 years. If the standard deviation is σ = 4 years, what is the probability of a person living to at least 92 years of age?

Assume that adults have IQ scores that are normally distributed with a mean of μ= 105 and a standard deviation o=15. Find the probability that a randomly selected adult has an IQ less than 123. Click to view page 1 of the table Click to view page 2 of the table. The probability that a randomly selected adult has an IQ less than 123 is (Type an integer or decimal rounded to four decimal places as needed.). THE

A driver has pumped 13 gallons of gas to his track. On average day that driver has to spend 2 gallons of gas with the deviation 1 gallons. Calculate the probability that these 13 gallons of gas will be enough for next 6 days of driving that track.

Assume that IQ scores are normally distributed, with a mean of 100 points and a standard deviation of 14 points. If 50 people are chosen at random, what is the probability that the sample mean of IQ scores will be between 98 and 102?P(98 ≤ x ≤ 102) = ?

A professor know that her statistics students' final exam scores have a mean of 79 and a standard deviation of 12.8. In his class, an "A" is any exam score of 90 or higher. This quarter she has 23 students in her class. Wht is the probability that 6 students or more will score an "A" on the final exam?

Scores for a common standardized college aptitude test are normally distributed with a mean of 480 and a standard deviation of 114. Randomly selected men are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 521.2. P(X > 521.2) = Enter your answer as a number accurate to 4 decimal places. If 15 of the men are randomly selected, find the probability that their mean score is at least 521.2. P(M > 521.2) = Enter your answer as a number accurate to 4 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help men do better. If the random sample of 15 men does result in a mean score of 521.2, is there strong evidence to support the claim that the course is actually effective? No. The probability indicates that it is too possible by chance alone to…