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The amount of fluid in a half-liter bottle of diet cola is normally distributed and, from past experiences the standard deviations known to be 1.20 milliliters (ml). A sample of 50 bottles reveals a mean weight of 502.1ml. Construct and interpret 90 percent on confidence interval for the mean. Be sure to interpret the meaning of this interval.
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
How many subjects would you approximately need to reduce the length of the 95% confidence interval to 2 units?
State in each of given cases whether you would expect relationship between given variables to be positive or negative or neither.
Data on distribution of cost for building effort, design work and testing effort.
Describe the sampling distribution model of this mean.
Three scholarships are available for students. Their values are: $2,000, $2,400, $3,000. Twelve students have applied and no student may receive more than one scholarship. Assume all twelve students are in needs of the funds, how many different..
Choose the correct conclusion regarding the claim that the weights of statistics text vary more than the weights of text in general.
What does the coefficient of determination tell you about the variation attendance and the variation in the number of exhibitors?
Pilot sample of n = 50 tires illustrated sample standard deviation equal to 4,000 miles. Based on this information, required sample size is?
In the real world, given null hypothesis is false; but the collected data lead to the null hypothesis being accepted. That is, the data lead to a failure to reject null hypothesis.
If statistically significant, do you believe the difference is large enough to be significant? If so, to whom, and explain why? Is normality assumption fulfilled? Describe.
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