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The tensile strength of an alloy has double specification limits. If the process average tensile strength is below 800 kg/cm2 or above 1200 kg/cm2, it is desired to accept such lots with a probability of 0.08. For lots with a process average of 1000 kg/cm2, it is desired that the probability of acceptance be 0.96.
The distribution of tensile strength is normal, with a standard deviation of 80 kg/cm2. Find the variable sampling plan and describe its operation.
During a meeting, one hospital administrator indicated that 70% of the geriatric patients are males. What is the sample proportion of male patients?
a single bolt is selected at random from 10000. three different kinds of defects a b and c are known to occur in these
when dragons on planet pern lay eggs the eggs are either green or yellow. the biologists have observed over the years
someone suggests that the lifetime t in days of a certain component can be modeled with the weibull distribution with
sums and linear combinations of normal random variables are also normally distuributed. suppose w x and y are
The mean of land and buildings per acre from a sample of farms was $637, with a standard deviation of 26. Use Empirical Rule to find approximate percentage of acreage whose values were between $ 661 and $663.
How large a sample must he select if he wants to be 99% confident that the true average time is within 15 minutes of the sample average? Assume the standard deviation of all times is 30 minutes.
in the linear regression equation yi35.03xi which of the following interpretation is correct here x is the number of
The idling speed of 14 gasoline-powered genera- tors is measured with and without an oil additive that is designed to lower friction. With the additive installed, the mean change in speed was 123 revolutions per minute (rpm), with a standard d..
in a different regression analysis 40 of the variance was explained. the sum of squares total is 1000. what is the sum
Typographic errors in a text are either nonword errors (as when "the" is typed as "teh") or word errors that result in a real but incorrect word. Spell-checking software will catch nonword errors but not word errors.
Using alpha = 0.05 and a computed value of +4.49, can we conclude that the percentage of claims for married policyholders is less then for single policyholders?
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