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A datset is provided on a 3 factor factorial on the amount of rot on a potatoe crop. The variables are:
Type of BacteriaTemperature levelOxygen level
Create interaction plots (there a 3 seperate plots, Bacteria and Temp, Bacteria and Oxygen, Temp and Oxygen).
Perform F-tests and make conmclusions on what type of model you have.
Create and test/CI a main effect contrast on Bateria (1 and 2) vs. 3.
A technical training school, located in 3 cities: Atlanta, Chicago and San Fransisco, wanted to determine if there differences in student scores for the 3 locations. Two instructors were chosen from each location, and then two students chosen from each instructor. The data are located hereWhat design is this?Which factors are fixed and whic random?Obtain the ANOVA table.Answer the research question as thorougly as possible.
If the standard deviation of the population is 9 hours, determine whether there has been a significant increase in battery life expectancy.
A die is rolled 60 times. An "ace" is the side with one dot. Use the normal approximation to estiate the chance of getting exactly 12 aces.
The following table presents data on political party affiliation and class level for sample of students in certain university: If the student is selected at random from sample, determine the probability that student is Republican.
Assuming 250 of each sex, can we conclude that there is a significant difference in the proportions at a 0.05 level of significance?
The effectiveness of treating respiratory infections with herbal remedies was studied. "Days of fever" was used to measure effects. Among 356 children treated with herbal remedies, teh mean number of days with was 0.36,
An economics professor randomly selected 100 millionaires in the United States. The average age of these millionaires was 54.8 years with a standard deviation of 7.9 years.
In order to determine the effect of secondhand smoke, the state agency needs to measure the nicotine level at the work site. It is not possible to measure the nicotine level for every company that reports to the agency.
Use three decimal places in your answers for this problem. The following table was collected.
What is the test statistic? Give answer to three decimal places What is the critical value? Give answer to three decimal places. The proper conclusion is to reject H0.
Conceptually we would expect the probability of newborn males and females to be the same. However, census reports indicate that the ratios of males and females in various countries do not conform to the theoretical prediction.
The director of golf for the Links Group wishes to study the number of rounds of golf played by members on weekdays. At the .05 significance level, is there a difference in the number of rounds played by day of the week?
If Xbar is the sample mean diameter for a random sample of n = 16 rings, where is the sampling distribution of Xbar centered, and what is the standard deviation of the Xbar distribution?
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