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As the size of the smoothing constant, α, increases:more weight is put on historic demand data.,more weight is put on recent demand data,the sensitivity of the model decreases, the stability of the model increases?
The following statistics were calculated from pairs of observations where X represents the independent variable and Y represents the dependent variable.
At the .01 significance level, is there a difference in the mean number of times boys and girls use Facebook in a given day? Based on the p-value
A researcher is interested in the effects of exercise on mental health and he proposes the following study: Use stratified random sampling
Assuming that these numbers are exact and that the sample was randomly chosen from the entire population of interest, give a 90% con?dence interval for the proportion of ?lled MBA positions in Europe.
In one investigation, it was found that children age 12 learn better when allowed to discover rules whereas children age 6 learn better when taught didactically
Which type of study requires a high incidence rate? -a high prevalence proportion? -a high level of funding? -treatment under control of the investigator?
The company estimates there's a 30% chance it will get the larger contract and a 60% chance it will get the smaller contract. Assuming the contracts will be awarded independently, what's the expected profit?
Classify the following as an example of nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level: Gender of employees at a local warehouse.
Suppose the probability of winning in a gambling game is .001, and when a player wins, his or her net gain is $999. When a player loses, the net amount lost is.
The monthly utility bills are normally distributed with a mean value of $130 and a standard deviation of $15.
Calculate the mean and standard deviation of service times for all drive-thru customers at the Stardust Coffee Shop.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
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