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In conducting a survey of adults, a pollster claims that he randomly selected 50 subjects, 3 were men. Is this statistically significant?
you are given the following information obtained from a random sample of 4 observations from a large normally
What type of situation would I be able to understand how to use regression as a key driver as an influence in sales or other outcomes?
two separate samples each with n12 individuals receive two different treatments. after treatment the first sample has
Horizon Leasing Inc. signs an agreement on January 1, 2014, to lease equipment to one of its customers. The following information relates to this agreement.
Find out the crude death rate, age specific death rate, standard death rate and adjusted death rate.
The physician also knows that if a patient is untreated (or does not take the prescribed medication), then the mean DBP over 4 weeks will decline by 2 mm Hg with variance 33/n. What is the probability that an untreated subject will decline by at ..
The lengths of Atlantic croaker fishes are normally distributed, with a mean of 9 inches and a standard deviation of 2.56 inches. An Atlantic croaker fish is randomly selected.
4. Why is a 99% confidence interval wider than a 95% confidence interval?
How many packages should be sampled in order to be 90% confident of being within 0.9% of the actual population percentage of packages delivered damaged.
for a hypothesis test of a difference of means with n135 and n245 what is the value for the degrees of freedom
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 30.
A researcher administers a treatment to a sample of participants selected from a population with µ = 80. If the researcher obtains a sample mean of M = 88, which combination of factors is most likely to result in rejecting the null hypothesis?
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