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A recent gasoline survey said that the national average price of gasoline was $1.498 a gallon. it was felt that the gasoline in Texas was significantly lower than the national average. A survey of 10 different suburbs in Dallas Texas found the average gasoline to be $ 1.294 a gallon with a standard deviation of $ .0526. What is the critical value using a=.05 and what is the test value.
The average hourly wage of employees of a certain company is $9.83. Assume the variable is normally distributed.
The simple coefficient of determination is the proportion of total variation explained by the regression line.
Testing for equality of variances - Independent random samples were taken from normal distributions of the yearly production of ships built by the International Ship Building Company under
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
Determine the standard deviation of difference between Sarah's and Richard's scores?
Determine a 95% confidence interval for true time battery pack can function before having to be recharged.
One-way Analysis of Variance (ANOVA) test - How many treatments are there and What is the total sample size?
Difference between the discrete and the continuous random variable.
Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Consumer Price Index is: a. a weighted aggregate price index where the weight for each item is its current-period quantity. b. a weighted aggregate price index where the weight for each item is its last-period quantity. c. an index that is designed t..
Plot the data on the same line and give your impression regarding any apparent differences between the two companies.
If the population mean is 36, are the serial killers significantly more introverted at the .05 level? Perform the appropriate one-tailed test.
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