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When testing a claim about a population mean with ? known, either or both of these conditions is satisfied: The population is normally distributed or the sample size n is greater than 30, that is, n > 30. How do we verify that a population is normally distributed?
question use the program binomial probabilities to find the probability that in 100 tosses of a fair coin the number of
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
What is the probability that the contaminated can is selected for testing?
If the sample mean is 12.7 oz. and the sample standard deviation is 0.70 oz., find the 95% confidence interval of the true mean.
The Warren County Telephone Company claims in its annual report that "the typical customer spends $70 per month on local and long-distance service.
Although this critique was later discarded, how does user error affect the marketplace. When I buy my morning coffee at Starbucks, the cup warns me: "Careful, the beverage you are about to enjoy is extremely hot."
A deck of playing cards contains 52 cards, four of which are aces. What is the probability that deal of a five-card hand provides?
Camera batteries has a standard deviation of 2.1 months. Assume the variance is normally distributed. Do you fell that the lifetimes of the batteries are relatively consistent?
Set up hypotheses and carry out all relevant tests. Describe all results and implications which you have discovered.
a candy company claims that 19 of its plain candies are orange and a sample of 100 such candies is randomly
Testing indicates that the lifetimes of a shipment of disposable butane lighters are normally distributed with a mean of 1000 lights and a standard deviation of 100. What percentage of these lighters will:
Considering a newly arriving customer to the checkout line. what is the probability that this customer will not have to wait behind anyone.
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