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The manager who implemented the change on the order picking process for medium items wants to be certain of the margin of error. Assume that the standard deviation is known and it's equal to 3. How large should the sample be as to have a margin of error of 2 minutes with a confidence level of 99%. How large should the sample be to have a margin of error of 1 minute
Verify that the mean and variance are .3 and .21, respectively. What is the probability of getting a value less than the mean?
What is margin of error and how do you calculate it in simple random sampling? To explain this, use a random sample of 100 individual.
mike took clothes to the cleaners three times last month. first he brought 2 shirts and 1 pair of slacks and paid 7.47.
the supreme court has said that z-scores beyond z 2 or 3 are generally convincing statistical evidence. for a
a manufacturer of cordless electric shavers sampled 13 from a days production and found the mean time of continuous
Interpret the following computer cross-tab output including a X2 test. Interpret the computer cross-tab output, including a Chi-square test.
question 1 scores are obtained from the law school admission test lsat are normally distributed with a mean score of
a polling company obtains an alphabetical list of names of voters in a precinct. they select every 20th person from
The standard deviation equaled five days. Assuming that the distribution is normal, what percent of the invoices were paid within 15 days of receipt?
suppose a coin having probability 0.7 of coming up heads is tossed three times. let x denote the number of heads that
There is sufficient evidence to support the claim that the mean speed of all cars on that section of I-10 is greater than the posted speed limit of 70 mph.
there are 10 employees in a particular division of a company. their salaries have a mean of 80000 a median of 60000 and
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