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Find the expression for velocity profile, the mass flow and heat transfer rates of air due to natural convection in a vertical channel of circular and square cross-section for the fully developed flow. The walls are kept at temperature Tw= 30 C and the channel has the height of H=3 m.. The walls are separated by a distance of t=10 cm in the square channel case or the channel has diameter of d=10 cm in the circular-cross section case. The air enters the duct between walls at T =10 C.
What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one- or two-tailed.
A marketing survey involves product recognition in New York and California. Of 600 New Yorkers surveyed, 195 knew the product while 150 out of 614 Californians knew the product.
The rest have no opinion. Suppose that a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
The advertising firm of McMann and Tate has put out bids for two separate contracts. Based on past experience, they believe that they have a 0.7
Create a 2 X 2 from the information provided and calculate the appropriate statistic to determine the odds of contracting uterine cancer when using estrogen
Recent crime reports indicate that 5.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
use this calculation table for the chi-square test for goodness-of-fit to complete this
The sample mean was found to be 194 pounds with a standard deviation of 11.2 pounds. What percentage of men have weights between 175 and 2235 pounds?
The probability that a flower seed will germinate is 0.7. Find the mean and standard deviation for the random variable x, the number of seed that will germinate in each set.
The monthly average sales of the Smiling Ninja Computer Company may be approximated to a normal distribution curve. It has a mean of $22,000 and a standard deviation of $3,300.
It could not do anything with the airport and suffer a loss of revenue. The current value of raised revenue from a new airport is in question.
Parents collected a simple random sample of the times that 81 college students required to earn their bachelor's degrees. The sample has a mean of 4.8 years and a standard deviation of 2.2 years. Use a 0.05 significance level to test the claim tha..
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