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30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secure is:
a) exactly five
b)more than five
c)at most five.
A four-year university has decided to implement new approach to teaching Statistics. Full-time and adjunct professors were surveyed to determine whether they preferred the traditional lecture approach or a computer approach to teaching Statistics.
Consider the continuous random variable X, which has a uniform distribution over the interval from 20 to 28. The probability that X will take on a value between 21 and 25 is.
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
Using classical methods discussed in class, try to estimate the probability of winning.
If a blue ball is selected you win nothing. Let X be the amount that you win. The expected value of X and let the random variable X be a random number with the uniform density curve given below
If desired confidence level is 95 percent, suitable critical value is?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
Compute a 5-month moving average forecast for June through January.
What is the probability that a student who has failed the test came from the South District?
Calculate the standard error. With 95% confidence, find out the margin of error?
Construct a test of 20 objective type items in your subject. Administer test to a group of 50 students conduct an item analysis and write a report. Explain the meaning of co-efficient of correlation. Why does the homogeneity and heterogeneity of sco..
Data on distribution of cost for building effort, design work and testing effort.
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