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Suppose you are conducting a study with a total of 50 participants from five different regions of the country, and you want to determine if the average blood pressure is different among these groups. What statistical test would you use?
Analysis of Variance
Chi-square goodness of fit test
Chi-square test of independence
Z-test
The average cost of a one bedroom apartment in a town is $550 per month. What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviat..
a large study was conducted to test the effectiveness of a drug in combination with aspirin in warding off heart
She asks 10 people how many Standard Deviations songs they know. Her data are:
a simple random sample of size n 1000 is obtained from a popultion whose sie is n 1000000 and whose population
Fit both linear and an exponential trend to the data. (d) Which model is preferred? Why? (e) Make a forecast for 2003, using a trend model of your choice (or judgments forecast).
You work in the corporate office for a nationwide convenience store franchise that operates nearly 10,000 stores. The per-store daily customer count has been steady,
A person asks, "what do you think is the ideal number of children for a family to have?" The 497 females who responded had a median of 2, mean of 3.02, and a standard deviation of 1.81.
Three are selected, at random, without replacement from the batch. What is the probability that the third is not defective given that one of the previous two are defective?
Let be the average of the pay you receive for the first and second week. Find the sampling distribution
Consider babies born in the "normal" range of 37 - 43 weeks gestational age. Extensive data supports the assumption that for such babies born in the United States, birth weight is normally distributed with mean = 3432 grams and standard deviati..
1. if x is a binomial random variable with parameters n and p show that y n?x is also a binomial random variable. what
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
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