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National figures reveal that the probability that a youthful offender on probation will commit another crime is 0.80. A special rehabilitation program was conducted for youthful offenders.
an airline has an advertisement that states ...our passengers always receive their bags within 20 minutes after the
Two independent samples of sizes n1 = 50 and n2 = 50 are randomly selected from two populations to test the difference between the population means. The sampling distribution of the sample mean difference, is:
what are the z scores above and below the mean that contain the middle 90 of a normal
The amount of income spent on housing is an important component of the cost of living. The total costs of housing for homeowners might include mortgage payments, property taxes, and utility costs (water, heat, electricity).
Whether regression can be used to estimate the Demand from other data in the file. So that Howies can determine the daily supply in a more cost effective way.
The probabilities .9 and .1 respectively. Give the probability distribution for daily sales. Find the mean and standard deviation of the daily sales.
Estimate a regression model with trend & season dummies to forecast the next year sales:
q1. if we have a sample size of 100 and the estimate of the population proportion is 0.10 the mean of the sampling
a normal population has m 50 and s 8. a random sample of n 4 scores from this population has a mean of 54. what is
Let X denote number of students which were on bus carrying this arbitarily selected student. One of the 4 bus drivers is also arbitarily selected. Calculate expectations and variances of X.
Evaluate probabilities using the laws of probability, the standard normal distribution, t-distribution, or X2-distribution.
One suggested environmental determinant of pediatric lung function is the level of cigarette smoking in the home. A researcher wants to do a pilot study with two groups:
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