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1. The amounts (in ounces) of juice in eight randomly selected juice bottles are:
15.4 15.7 15.2 15.8 15.8 15.4 15.0 15.6
Assuming the population of amounts in juice bottles is known to be normally distributed, create a 95% confidence interval estimate for , the mean amount of juice in all bottles.
You will be asked to identify x-bar, s, , df, t, E and the confidence interval.
2. Previous studies have indicated the standard deviation of annual earnings for college students is $850. How large a sample would need to be taken to estimate the mean for college students' annual earnings to within $200 with 99% confidence?
3. A researcher is interested in estimating the proportion of voters who favor a tax on e-commerce. How large a sample would she need to collect to estimate this proportion to within 5% with 95% accuracy?
Evaluate the area under the standard normal curve that lies to the left of z = - 3.49 and simple random sample of size
Is there evidence that the population mean is above $300, if X (bar) = $305.11 and s = $43.20?
The simple random sample is n = 14, σ = 12.5 and the original population is normally distributed.
Suppose that the average annual salary for the worker in United States is $39,000.00 and that the annual salaries for Americans are normally distributed with a standard deviation equal to $7,000.00.
Calculate the mean absolute deviation based on the 2-day moving average. You can have a forecast and an actual temperature.
Describe the optimal solution to a linear programming problem. comprise the following constraints from a two -variable linear program.
Carry out the suitable calculations to test for effect modification. Interpret your results.
What is the distribution of X? State its mean and variance.
Do the data provide significant support for any preferences among the three brands? Test At the .05 level of significance.
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. If you determine not to reject the null hypothesi..
Compute the coefficient of multiple determinations.
Describe the difference in the fit provided by the two estimated regression equations.
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