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1. 12 mature citrus trees of one variety and 15 of another gave means and standard deviations of their heights as 13.8 and 12.9 ft (means), and 1.2 and 1.5 ft (standard deviations). Find a 95% confidence interval for the true difference in average heights between all trees of the first and the second variety.Would you be able to validate the assumptions in this case?
2. 25 observations are collected from a normal distribution with variance 4. give a number 'c' such that the sample mean is within a distance 'c' from the population mean with a probability of 95%.
What is the probability that the kickoff will go between 60 and 75 yards if the average kickoff is 50 yards with a variance of 49?
Determine the pairs which are significant according to LSD and what pairs are important according to Bonferroni?
An electrical firm manufactures electric light bulbs that have a length of life which is normally distributed with mean and standard deviation equal to 500 and 50 hours, respectively.
The strength of the linear relationship between two numerical variables may be measured by the
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. the individuals in experiment were grade 12 math students from one particular high school.
When performing a 2-way ANOVA with replication you must first: A) Perform an interaction hypothesis test B) Take out the error because you ran replicates and error makes no sense with replicates
Many people attend work and produce little or nothing of value that is why they are terminated.
At the 5% level of significance, test whether the proportion of internet users paying bills online is now more than 50%.
Correlation based on Scatter Plot - Draw the scatter plot for the variables.
In a study designed to determine patientâ??s acceptance of a new pain reliever, 100 physicians each selected a sample of 25 patients to participate in the study.
Samples of size 49 are taken from a population with a σ of 17. If the mean of the sample is 25, what is the confidence interval at the 90% confidence level
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