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Coffee manufacturers are interested in whether the mean daily consumption of regular coffee drinkers is less than that of decaffeinated-coffee drinkers. A random sample of 50 regular-coffee drinkers showed a mean of 4.35 cups per day, with a standard deviation of 1.20 cups per day. A sample of 40 decaffeinated-coffee drinkers showed a mean of 5.84 cups per day, with a standard deviation of 1.36 cups per day. Use the .01 significance level. Compute the p-value.
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
By using the normal probability distribution, what is the probability the car will be repaired in 35 minutes or less?
What is the best prediction for the number of products sold based on advertising costs of $7000?
Use the method of least squares to model the relationship between x and y.
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
The Central Limit Theorem states that the sampling distribution of means is:
By using the maximax criterion, what decision should be made by the decision maker?
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
Make use of normal probability distribution features of EXCEL to help determine the probability.
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?
95% of breaking strengths will be contained between what two values symmetrically distributed around mean?
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