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A farmer wants to try a new experimental diet on his hogs. He wants to be 95% confident that the average weight gain will be within 9 pounds. If the standard deviation is 20 pounds, and the weight gain is normally distributed, how many hogs should receive the new experimental diet?
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.
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
Scores on an endurance test for cardiac patients are normally distributed with mean = 182 and standard deviation = 24.
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
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
Use the Emperical Rule to find what two values 68% of the data will fall between for a data set with a mean of 219 and standard deviation of 20.
"Do you believe that gun control laws which restrict the ability of Americans to protect their families should be eliminated?"
if you assume returns follow a normal distribution, which investment has a better chance of giving you $40 million in returns.
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Carry out the test for the variance of girls score is not significantly less than the given data.
Identify whether the following variables are numerical or categorical if numerical state whether the variable is discrete or continuous. if categorical state, whether the variable is nominal or ordinal.
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