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Calculate the correlation of the data set (3,2), (3,3), (6,4).
A 95% confidence interval for the average miles per gallon for all cars of a ginven type is 32.1 plus/minus 1.8. The interval is based on a sample of 40 randomly selected cars.
What units represent the margin of error?
Suppose you want to decrease the margin of error, but want to keep the 95% confidence interval. What do you need to do?
The table given below shows joint probability distribution of X and Y . Determine the covariance between the X and Y ?
Determine the proportion of variation in grade that can be explained by the linear correlation between the grade and the number of credit hours earned at the same time of taking the course.
To make a p-chart for the nonconforming units. The coating of the candy bar is currently make by a process which can result in surface cracking.
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
Now suppose that a finished product is randomly selected. What is the probability that it is defective?
Determine the p-value, and at 95% confidence, test the hypotheses.
Pick a random sample of 50 homes from the enclosed 90 cases. Double the asking price and selling price and use this data to develop three predictive models:
A store asked 250 of its customers whether they were satisfied with the service or not. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
Findout probabilities utilizing standard normal distribution. If the debt is normally distributed with a standard deviation.
Supposing that both populations are normally distributed, construct a 99% confidence interval for the ratio of the two population variances.
The useful life of an electrical component is exponentially distributed with a mean of 2500 hours. a. What is the probability the circuit will last more than 3,000 hours.
The variable recorded for each subject was the number of additional yards (possibly negative) that the subject could drive the ball by the end of the season. In the two-way ANOVA the DFM
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