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On average, 40 percent of U.S. beer drinkers order light beer.
a) What is the probability that none of the next eight customers who order beer will order light beer?
b) That one customer will? (round to 4 decimal places)
c) Two customers? (round to 4 decimal places)
d) Fewer than three? (round to 4 decimal places)
What does the binomial distribution chart look like? Can I use Excel to come up with this chart?
Given that X1 is in the model, does X2 contribute to predicting the dependent variable at the .05 significance level?
Construct and interpret 90 percent on confidence interval for the mean. Be sure to interpret the meaning of this interval.
Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
For a standard normal distribution, findout the percentage of data that are among 3 standard deviation below the mean also1 standard deviation above the mean.
For adults 60 years or older, they found a mean daily intake of 721 mg with a standard deviation of 454 mg. Using these values for the mean μ and standard deviation σ for the U.S. population:
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?
Testing equality of two means - difference in performance of the two gasolines and difference in gasoline mileage output
Compute the mean, median and mode measures of central tendency for the number of years of work experience. Which measure does the best job of describing central tendency for this variable?
Some of the factors affect statistical power for a one sample t test. How does statistical power change (increase or decrease) for each of the following changes?
A coin was flipped 60 times and came up heads 36 times. Determine the critical value you would use to test whether proportion of heads is greater than 0.50 at 10% level of significance?
The probability of getting a promotion and a raise is 0.25. What is the probability of getting a raise.
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
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