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The mean diameter of a ball bearing produced by a certain manufacturer is 0.80 cm with a standard deviation of 0.03 cm. A sample of 36 ball bearings is randomly selected from a production run. Answer the following:
a) What is the probability that the sample of balls bearings will have a mean less than .798 cm?
b) What is the probability that the sample of ball bearings will have a mean of at least .815 cm?
c) What is the probability that the sample of ball bearings will have a mean between .798 and .815 cm?
d) For samples of size 36, 15% of all sample means are at most what diameter?
assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of 2225
The probability distribution of the daily demand for a product is shown below. What is the expected number of units demanded per day? Determine the variance and the standard deviation.
Draw a simulation experiment for car agency and simulate using fleet of four rental cars for 10 days.
How large a sample must one take to be 90% confident that the estimate is within 0.05 of the true proportion of women over 55 who are widows?
john conducted his study to measure self-esteem among victims of domestic violence before and after they complete an
Wwhat are our h0 and ha ? (c) compute zobt.(d) with a= .05, what is zcrit? (E) do we have evidence of a relationship in the population? if so describe the relationship.
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you have obtained a sub-sample of 1744 individuals from the current population survey cps and are interested in the
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
a hand of 13 cards is dealt at random and without replacement from an ordinary deck of 52 playing cards. find the
What is the probability that a randomly selected monthly cell phone bill is more than $100?
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
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