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Two independent samples of sizes n1 = 50 and n2 = 50 are randomly selected from two populations to test the difference between the population means. The sampling distribution of the sample mean difference, is:
Would the null hypothesis be accepted or rejected in this case?
If 50 cups of coffee were measured, what is the probability that: The sample mean per cup is less than 7.8 ounces?
Can one conclude at a level of significance of .01 that the new ball has improved his game?
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
A machine fills containers with a mean weight per container of 16oz. If no more than 5% of the containers are to weigh less than 15.8oz, what must the standard deviation of weights equal?
In the past HR uses an average of 25 vacation days per worker in order to make available man-hour and payroll predictions. Is there evidence to show that the number of vacation days decreased over the past year? Use alpha = .05
Results were analyzed using one -way ANOVA and included SSTR =7 , 102 and SSE = 10 ,511. Are all 8 tapes equally appealing on average? Determine p value?
Develop a linear regression equation for the given data and forecast how much money Robert will win if he spends $30.
Compute the suitable Test Statistic to test hypothesis that the proportion of condominiums that sold within 30 days decreased from 2006 to 2007.
Determine margin of error for confidence interval in (a)?
Determination of Nominal, Ordinal, Interval, Ratio.Temperature is an example of what level of measurement.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
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