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It is claimed that in a bushel of peaches, less than ten percent are defective. A sample of 400 peaches is examined and 50 are found to be defective. What is the critical value for a = 0.025?
Metal detectors at airports are used to determine whether passengers are carrying weapons. If the null hypothesis states that a passenger isn't carrying a weapon, a type I error would occur whenever
70 of adults in a european city say that they enjoy using public transportation. if a random sample of 8 adults is
a researcher obtains an f-ratio with df 2 36 from an independent-measures research study. what is the total number of
The effectiveness of treating respiratory infections with herbal remedies was studied. "Days of fever" was used to measure effects. Among 356 children treated with herbal remedies, teh mean number of days with was 0.36,
what are the confidence limits for the proportion that plan to vote for the Democratic incumbent?
a hypothesis test for a population proportion p is given below ho p 0.25 vs. ha p ne 0.25 ne means not equal for
q1. an fbo a fixed-base-operator usually the manager of a small-town airport makes his revenue in three ways flight
which of the following would be an example of a design that examines the effects gender and school type i.e. elementary
Determine the special property of standard normal distribution, compared to other normal distributions?
on friday wall street traders were anxiously awaiting the federal governments release of numbers on the january
Drug sniffing dogs must be 95% accurate. A new dog is being tested and is right in 46 of 50 trials. Find a 95% confidence interval for the proportion of times the dog will be correct.
Their mean monthly sales were $10,000 with a standard deviation of $1000. Construct a 95% confidence interval for the population mean.
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