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1. A survey of 250 lobster fisherman found that they catch an average of 32 pounds of lobster per day with a standard dev of four pounds. If a random sample of 30 lobster fishermen is selected, what is the probability that their average catch is less than 31.5 pounds?
2. The standard deviation of a distribution is 20. If a sample of 225 is selected, what is the standard error of the mean?
Find the point on the line y = 3x + 3 that is closest to the origin. (Give your answers correct to three decimal places.)
Determine the boundary values of the 95 percent confidence band for the regression line when Xh = 28. Is your-confidence band wider at this point than the confidence interval in part (a)? Should it be?
A formula is derived for the n-th derivative of a function that is a product of two other functions, f(x)=u(x).v(x). This formula is used to write down the n-th derivative of f(x) = e^x/(1 − x).
what is the probability that the mean breaking strength of the 5 untreated specimens exceeds 50 pounds? what is the probability of the mean breaking strength of the 5 treated specimens exceeds 50 pounds?
In right triangle BCD, BD=12 m
If the rope is pulled in at a rate of 1.4 m/s, how fast is the boat approaching the dock when it is 10 m from the dock?
what are the length and width of a rectangle traffic sign if the length exceeds the width by 15 inches and the perimeter is 158.
Type your question herA population of bacteria is growing according to the function below, where t is in hours. How many hours will it take for the population to grow to 1,000,000 bacteria? Round your answer to the nearest integer. Do not include ..
Find the sum/difference as a product of sine’s or cosines.
A statistics professor plans his classes so carefully that the lenghts of his classes are uniformly distributed 50.0 and 52.0 minutes. Find the probably that a given class period runs greater than 51.5 minutes.
What is the expected number of claims made by males under 25? What is the standard deviation of the distribution?
A jazz concert brought in $166,500 on the sale of 8,100 tickets. If the tickets sold for $15 and $25 each, how many of each type were sold?
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