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Suppose the evaluation model showed that for a particular restaurant the resource mix necessary to produce a given output mix was 90% of what another restaurant was using to produce that same mix of
How often do you have to toss a coin to determine P(heads) within .1 of its true value with probability at least .9?
Find the z-score corresponding to a score of X = 100 for each of the following distributions. Make sure to indicate the direction (sign) of the z-scores.
Explain what these measure. Are they the same as forecast accuracy measures? Why or why not.
The 2 largest challenges we face in applying a decomposition model is understanding the components and how it will affect our forecast. We typically see the largest enrollment numbers in the fall d
If being female is independent of being left-handed, what proportion of the population consists of left-handed females?
Part of our daily activities is to forecast our expected enrollments each day, week and quarter. We in admissions can base our forecasts off of various components to determine accurate numbers.
Write a brief description of a real-world example in which one measure of central tendency provides useful information while another measure of central tendency provides meaningless (or even mislea
The amount of gasoline sold daily at a service station is a value of x of a random variable. Determine the probability that daily sales will fall between 2500 and 3000 gallons.
Even though my organization has a tough time separating the target/goal definition with the forecast definition; the method of forecasting we use is time series.
The current seventh graders at the principals school, Help! I need the answers to these questions. How soon can I get the answers and do I have to pay $20 again. Thank you, Joy
How would you, as a researcher and public health professional, convince someone who is skeptical about research results obtained from a sample, that data are reliable and an accurate representation
Suppose that X is a continuous random variable with a probability distribution f(x) = (2x)/25 where x is between 0 and 5 (inclusive). Now let Y = 3x + 5 and domain be 5 ≤ y ≤ 20. Find:
Identify the circumstances in which the median rather than the mean is the preferred measure of central tendency.
Assume that the probability a child is a boy is 0.51 and that every child's sex, born into a family, is independent. What is probability that a family of 5 children has exactly 3 boys.
The following data are results from a study you recently completed. Calculate the correlation coefficient for this data. (Show work or use excel print out)
A quality-control technician must select a sample of 10 dresses from a production lot of 74 couture dresses. How many different samples are possible? Express your answer in terms of factorials.
For each individual , the probability that they will pass the proficiency exam (independant of their classmates) is .99. If there are 500 students in the school, what is the prob that everyone wil
A meteorologist who sampled 13 thunderstorms found that the average speed at which they traveled across a certain state was 15 miles per hour. The standard deviation of the sample was 1.7 miles per
The mean was 27.47 years with a standard deviation of 10.69 years. About how large would the sample size have to be to cut the margin of error by a factor of 4?
A confidence interval for the price of gasoline from a random sample. If we had the same stats from a sample of 80 stations, what would the 95% confidence interval rating be?
While attending a sales meeting you were asked about the relationship between sales calls and actual sales made.
A sample has a mean of m=25. if one person with a score of x=25 is added to the sample, what effect will it have on the sample mean?
What are the degrees of freedom for the numerator and denominator?
μ=Suppose Z is the standardization of X (Z=(x-μ)/σ) where μ and σ are the mean and standard deviation of X, calculate the mean and standard deviation of Z?