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Variation exists in virtually all parts of our lives. We often see variation in results in what we spend (utility costs each month, food costs, business supplies, etc.). Consider the measures and data you use (in either your personal or job activities). When are differences (between one time period and another, between different production lines, etc.) between average or actual results important? How can you or your department decide whether or not the variation is important? How could using a mean difference test help?
Which distribution should be used to create 80% confidence interval?
What can you tell me about the direction, strength and significance of this association and What would you expect for somebody without any formal education whatsoever and what can you tell me about the nature of this relationship?
What is the probability that the team wins tonight and that there will be a large crowd at tomorrow's game?
Conclude the finite population, correction factor.With the population size of 1,000 and a planned sample size of 200, what is the finite population, correction.
Give a possible description why serum cholesterol values for older males are lower than for younger males and reverse is true for females.
A company has set a goal of developing a battery that lasts over 5 hours in continuous use in a sample of 42 of these batteries the mean life time was 306.25 hours with a standard deviation of 29.31
Find a 90% confidence interval for the population mean salary of such personnel. What is the margin of error.
Using given data table, find out midpoint for class with greatest frequency?
If a student guesses on each question, what is the probability that the student will pass the test?
Create a 98 percent confidence interval for the population mean.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
In chi-square goodness-of-fit test when there is close agreement between observed frequency and expected frequency, chi-square test value will be small.
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