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What percentage of the adults in this sample has an IQ score between 90 and 129, inclusive?
90-109 = Frequency 450 CR Frequency = 0.743
110-129 = Frequency = 253 CR Frequency = 0.975
In a string of 100 Christmas lights, there is a .011 chance that a given bulb will fail within the first year of use (if one bulb fails, it does not affect the others)
A manufacturer of cheese has a number of production facilities across the country. One product that is produced is used by a major pizza chain, and it is critical that there is consistency in the cheese made by individual plants.
Develop a 99% confidence interval for the population mean household income, assuming a normal distribution.
There are 10 rolls of film in a box and 3 are defective. Two rolls will be selected, one after the other. What is the probability of selecting a defective roll folloed by another defective roll?
the monthly starting salaries of students who receive an mba degree have a population standard deviation of 110. what
Shank's, Inc., a nationwide advertising firm, wants to know whether the size of an advertisement and the color of the advertisement make a difference in the response of magazine readers.
What is the mean and standard deviation of the daytime waiting times? and what is the mean and standard deviation of the nighttime waiting times?
q1. a market researcher wants to test to determine if families of four in city a spend less per week on average than
Is this an observational or an experimental study?- Describe the sample in this problem.- Is this a random sample? Justify your answer.
the local county is considering a budget proposal that would reallocate funding to renovate the city pools. a survey is
Briefly describe your experiment. You must have a valid and ethical experiment (NOT an observational study) and/or question.
if y is a random variable that has an f distributions with v1 numerator and v2 denominator degrees of freedom show
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