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The mean weight of Lay's mini size chips is 28.3 gram with a standard deviation of 1 gram, what's the probability to get a sample of 30 bags of this kind of chips with an average weight less than 28 gram?
question a recent national survey asked adults if they thought the government should continue to fund nasas efforts
consider a dial having a pointer that is equally likely to point to each of n region numbered 12...n. when we spin the
a fair ten-sided die is rolled once. event a is the event that a number less than 7 is rolled. event b is the event
Bags of tea are sampled to ensure proper weight. The overall average for samples is 8 ounces. Each sample contains 10 bags. The average range is 0.1 ounces.
Under the assumption that co payment amounts are normally distributed, find a 99% confidence interval for the mean amount in dollars.
difference between the population proportions. You may assume the samples are independent. Which of the following gives the justification for normality in this situation?
Assume you always reject null hypothesis, regardless of any sample evidence. Determine the probabiliyt of Type II error? P(Type II error).
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
1. what information does calculating standard deviation provide? how is the z-score related to standard deviation?2.
we break a stick at a uniformly chosen random location. find the probability that the shorter piece is less than 15th
a recent study focused on the number of times men and women send a twitter message in a day. the information is
according to a recent national survey high school girls average 100 text messages daily. assume the population standard
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