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Find the required probability for the normal distribution.
500 people were surveyed and asked to rate NYC subway system with the rating scale of 1 (lowest to 5 (highest). The average rating was 3.0, with a standard deviation of 0.5.
A: What is the proportion of people surveyed that rated the subway system from 3 to 4
B: What is the proportion of people surveyed rated the Subway System from 1 to 3
Solve different inventory control problems using an appropriate OR method.
We assume that the population is approximately normally distributed. Find the confidence interval: for a confidence level of 95%:
If the mean IQ of all Omega University students was equal to 115, and a small random sample of students was selected from the population whose mean IQ was 120, then this difference of 5 points would equal the:
Determine the probability that she lives in an all electric home?
Problems on Sampling Variability and Standard Error and Confidence Intervals
Claculate the exponential also adjusted exponential smoothing forecast and linear trend forecasting. The hotel has experienced the following occupancy rates for the past 9 years.
We are interested in testing to see if the variance of a population is less than 7. The correct null hypothesis is:
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
This distribution is positively skewed. The standard deviation of the population is not known.
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
What is the probability that the cereal would be high fiber? In other words, what is P (high fiber)?
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
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