If we are interested in estimating the population mean based on a sample from a population for which we know neither the mean nor the standard deviation, the critical value will be a t value from the t-distribution.
Indicate whether the statement is true or false
Q. 2A food warehouse manager plans to conduct a check on damaged packages. The warehouse covers a large area and products are spread out over the entire building.
Assuming that no products are more likely to have damaged packages than any other, what statistical sampling method would be used to reduce the time and effort required to do the study?A) Convenience sampling
B) Stratified random sampling
C) Cluster random sampling
D) Systematic random sampling
Q. 3Define optimal solution and constraints.
What will be an ideal response?
Q. 4To find a confidence interval for the difference between the means of independent samples, when the variances are unknown but assumed equal, the sample sizes of the two groups must be the same.
Indicate whether the statement is true or false
Q. 5Which of the following is not a characteristic of the normal distribution?
A) Symmetric
B) Mean = median = mode
C) Bell-shaped
D) Equal probabilities at all values of x
Q. 6What is the likelihood of finding a price of 3.85 or more for a gallon of gasoline from a normally distributed population of gas prices? Assume = 3.78 and = 0.05.
A) 0.0808
B) 0.4192
C) 0.3508
D) 0.1492
Q. 7For the data given above, identify the value of MAD. Hint: Round the forecast values to 3 decimal places.
A) 1,014,031.75
B) 818.73
C) 1,006.99
D) 16.51
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