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Two types of flares are tested for their burning times (in minutes) and sample results are given below.
Brand X Brand Y
n = 35 n = 40
x = 19.4 x = 15.1
s = 1.4 s = 0.8
Refer to the sample data to test the claim that the two populations have unequal means. Use a 95% confidence level. State null and alternative hypothesis along with your final conclusion.
A random sample of students is selected, and each one is asked to try first brand A and then brand B, or vice versa with the order determined at random.
How much net profit can John expect (on average) to earn from the store in total over the next five years?
Questions based on binomial distribution, variance of the binomial distribution, discrete random variable and continuous random variables.
Real estate agents always say "location, location, location" is the most important thing in buying a house. We want to know if the sales prices of homes in two neighborhoods are similar. A random sample is taken from each neighborhood. The prices ..
What is the intercept for the logistic regression equation and What is a 95% confidence interval for the odds ratio
One state lottery has 1000 prizes of $1, 200 prizes of $5, 50 prizes of $25, 15 prizes of $150, 4 prizes of $500, and 1 prize of $2500. What is the lottery expected profit per ticket?
How closely is the height of an individual related to the weight? Partial regression output for a sample of 92 individuals is below.
Answer the following three questions based on what you know about statistics now.
What is Peter's median grade point at graduation? What is the shape of the grade point distribution?
In which category is ANOVA properly classified?
A manufacturer of billiard balls is testing three additives to the basic plastic. Show the partial ANOVA table
In 1965, a newspaper carried a story about a high school student who reported getting 9207 heads and 8743 tails in 17,950 coin tosses. Is this a significant discrepancy from the null hypothesis H 0 = 1/2.
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