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A sustained long-term change in the level of the variable that is being forecasted per unit of time is: (A trend, A time series, Seasonality or A change due to business cycles)
You are appraising the quality of diamonds for your importer. A diamond without a clear center (opaque center) shall be downgraded and sold at discount.
Find the probability that he will answer at least 3 questions correctly.
Examine the two standard deviations. What do these indicate about the range of benefits enjoyed by the two groups?
To find weighted aggregate price index using Laspeyres and Paasche method.
The impact of campaign film on attitudes toward a political candidate was investigated. Prior to showing the film, the attitudes of 15 people toward the candidate were assessed using a political likability scale.
A government survey conducted to estimate the mean price of houses in a metropolitan area is designed to have a margin of error of $10,000.
If garage is robbed, determine the probability doors were left open?
A market researcher is interested in knowing the type of training that works best for DVD users. Thirty consumers are randomly selected from a population of known DVD owners (i.e., users).
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
Compute the pdf of continuous random variable Z where Z = X + Y and X is a continuous random variable uniformly distributed on [0, 2] and Y is a continuous random variable uniformly distributed on [0, 4]. Assume that X and Y are independent.
Descriptive statistic results from quarterly sales figures over a 18 year period (73 qtr) are below. Please interpret the standard Deviation and Median in terms of sales results,
The distribution of diastolic blood pressures for the population of female diabetics between the ages of 30 and 34 has an unknown mean μd and a standard deviation σd = 9.1 mm Hg.
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