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Four inelastic cables are attached to a plate and hold the 1-ft-long spring in compression when no weight is on the plate. There is also an undeformed spring nested within this compressed spring. If the block, having a weight of is moving downward at v = 4 ft/s when it is 2 ft above the plate, determine the maximum compression in each spring after it strikes the plate. Neglect the mass of the plate and springs and any energy lost in the collision.
if a wildlife service wishes to estimate the mean number of days of hunting per hunter for all hunters licensed in the
a two-stage clinical trial is planned for for testing h0 p0.10 versus ha pgt0.10 where p is the proportion of
The mean number of cargo ships that arrive at a port is 3 per day. The port has staff and facilities to handle up to 6 ships in a day. Using the Poisson distribution, find the probability that, on a given day,
assume that iq scores are normally distributed with a standard deviation of 19 points and a mean of 100 points. if 65
Calculate the mean and variance of X. Calculate the mean and variance of Y. Calculate the covariance and correlation between X and Y. Is there a positive or negative relationship between X and Y? Is the relationship strong, weak or moderate?
indicate whether each statement refers to a uniformly distributed variable normally distributed variable andor an
1. in clinical trials a certain drug has an 8 success rate of curing a known disease. if 8 people are known to have the
What is the 95% confidence interval for the standard deviation of birth weights at County General Hospital, if the standard deviation of the last 25 babies born there was 1.1 pounds.
a drug company is studying two drugs a and b which are used to dilate the pupils of human eyes during examination. nine
It conducts a telephone poll of 300 randomly selected households in the area and finds that 96 have VCRs. The p-value associated with the test statistic in this problem is approximately equal to?
If the player does not win or lose on his second roll he continues to roll, using the same criteria given for the second roll.
Is the study observational or experimental? Justify your answer. What are the independent and dependent variables?
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