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A statistician wants to estimate the mean weekly family expenditure on clothes. He believes that the standard deviation of the weekly expenditure is $125. Determine with 99% confidence the number of families that must be sampled to estimate the mean weekly family expenditure on clothes to within $15.
Draw the complete decision tree and determine whether the product should be launched or not.
Service A delivers the document with probability 0.9, Service B with probability 0.9 and Service C with probability 0.8. What is the probability that at least one copy of the document will be delivered on time?
The hypotheses are as follows: Null Hypothesis: μD ≤ 0, Alternative Hypothesis: μD > 0. From her data, the resesarcher calculates a p-value of 0.0162. What is the appropriate conclusion? The difference was calucated as (after - before).
A random selection of accounting firms from three regions is taken and they are asked to state the starting salary for a new accounting graduate. Do a one-way ANOVA to analyze these data using a 1% level of significance:
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with mean of 3.2 pounds and standard deviation of 0.8 pound. What percentage of samples of 4 fish will have sample means between 3..
A package of frozen vegetables has a label that says "contents 32 oz." The company that produces these packages knows that the weights are normally distributed with mean 32 oz. and has a standard deviation of 2 oz.
Plot Kaplan-Meier Survival curve estimates along with true survival curve for n=25,100,1000
Create the table for frequency distribution that has 16 class intervals of width 1 inch. Utilize 61.5 inches as lower limit of first interval and 62.5 as upper limit.
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each loation.
Craft one page brief of the statistical results (include any additional pages needed for any APA tables or graphs and the SPSS syntax and output) in which you do the following:
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