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The following data represent scores of 50 students in the applied business statistics test.
72 72 93 70 59 78 74 65 73 8057 67 72 57 83 76 74 56 68 6774 76 79 72 61 72 73 76 67 4971 53 67 65 100 83 69 61 72 6865 51 75 68 75 66 77 61 64 74
a. Prepare the frequency distribution table and the frequency histogram for this data set.
b. Compute the sample mean, sample median X(M), sample range, and sample variance.
c. Does the data set represent a sample or a population? If it is a sample, describe the population from which it has been drawn.
Determine the value of population mean? What is the best evaluate of this value?
The simple coefficient of determination is the proportion of total variation explained by the regression line.
Calculate the Coefficient of Skewness and the Coefficient of Variation for time spent working on QM.
The weekly demand for a product follows a normal curve with an average of 1000 units and a standard deviation of 200 units. In how many weeks during a typical 52-week year would be above 800 units?
Alice and Bob agree to meet at the bus stop between 12 noon and 1pm. They each arrive at a random time in that interval and wait for 5 minutes before leaving, unless they see the other person. What is the probability that they meet each other?
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Determine 95% confidence interval evaluate for average number of years served by all Supreme Court justices?
What is the probability of getting a number less than 5 on both?
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
To test whether there is any association between two variables using Chi-Square test for independence.
Does the normal distribution yield a good approximation of the actual results?
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