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Q1) The experiment has single factor with 5 groups and 7 values in each group.
a) How many degrees of freedom are there in finding among-group variation?
b) How many degrees of freedom are there in finding the within-group variation?
c) How many degrees of freedom are there in finding the total variation?
Q2) Operations manager at light bulb factory wishes to find whether there is any difference in the mean life types of machines. Population standard deviation of machine I is 110 hours and of machine II is 125 hours. Random sample of 25 light bulbs from machine I points out a sample mean of 375 hours, and similar sample of 25 from machine II points out a sample mean of 362 hours.
i) By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?
ii) Calculate p-value and interpret its meaning.
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
Based on the equation of the least-squares line, we use software to predict the average number of home runs hit per game per team for the year 2001. We obtain the following.
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
Compute the probability that randomly chosen student with a Master's degree majored in English or mathematics?
Using the probabilities above what is the expected size of family you draw?
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
One of the most important uses of a correlation is its potential use in_________
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?
What is the probability that a particular driver had exactly two speeding violations?
The standard deviation of the differences d for the paired sample data s d = ____________
What is the probability of a fatal accident over a lifetime?
What are the expected value and variance of the following probability distribution?
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