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What is the difference between standard normal distribution and t-distribution?
Could anyone help me this problem?
Assume that the heights of 5 year old boys are normally distribued with a mean of 100cm and a standard deviation of 60. What is the sampling distribution of the mean for a sample size of 900 and its confidence interval at the 99% level?
A manufacturer of nickel-hydrogen batteries randomly selects 100 nickel plates for test cells, cycles them a specified number of times, and determines that 14 of the plates have blistered.
By using the results in (a), construct a boxplot. Indicate clearly on the boxplot the five-number summary. Are the data skewed? If so, describe its skewness.
barrons conducts an annual review of online brokers including both brokers who can be accessed via a web browser as
Find out annual break-even volume for the Rolling Creek Textile Mill.
Most of the time managers will have initial (or prior) knowledge of the probabilities that an event or outcome will result. When new information is obtained, initial probability projections can be revised and improved. What statistical techniques ..
He is twice as likely to visit city X than the other city. Obtain the transition probability matrix. Also determine the proportionate visits by him to each of the cities in the long run.
Write a correct null and alternative hypothesis for testing the claim that the mean life of a battery for a cell phone is at least 115 hours.
1. thirty eight percent of young adults say they use credit cards because of the rewards program. seven young adults
Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
suppose y1 through y21 is a random sample from the population with the following density function fy 3y2theta3 0 is
Compute standard normal z-score corresponding to value of x = 23. e. Determine P(x 23). G. Determine P(16
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