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Identify the scale of measurement in each of the following:
a. attitudes toward school
b. grouping students on the basis of hair color
c. asking judges to rank order students from most cooperative to least cooperative
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Probability values based on normal distribution - old exit exam followed a normal distribution
Suppose a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another, it is reasonable to believe that their relative success would be independent.
Analysis of data sets assignment
Find the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
Find the relative risk for moderate beer drinkers as compared to nondrinkers, finds the 95% confidence interval
Use Hypothesis testing to determine if Dr. Boom is correct, that his sample of 25 rockets weight less than the average rocket.
Test the hypotheses that the average household income in the township is greater than $100,000. Hint: Start by stating the null and alternative hypotheses.
Graph the distribution using a histogram. Calculate the mean and standard deviation.
During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. 80% of the households spent more than what amount?
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