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The area of study is Sampling Methods and the Central Limit Theorem.
Consider the digits in the phone numbers on a randomly selected page of your local phone book a population. Make a frequency table of the final digit of 30 randomly selected phone numbers. For example, if a phone number is 555-9704, record a 4.
Draw a histogram or other graph of this population distribution. Using the uniform distribution, compute the population mean and the population standard deviation.
The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.
what size sample should the director choose if she wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99 percent reliability.
Determine change in average number of weekly viewers from to?
Find out the area using Normal distribution. As, if Z is a standard normal variable find out the probability that Z lies.
X is a normally distributed random variable with mean 10 and variance 24. a. Find P(X bigger 14) b. find P(8 smaller X smaller 20)
Suppose that an automobile manufacturer designed a radically new lightweight engine and wants to recommend the grade of gasoline to use.
Compute test statistic for sample data that you would use to test whether sample mean varies from population mean of 10 pounds at a 5 percent level of significance in two-tailed test.
Using least squares regression analysis, what would you estimate demand to be for each month next year?
A random sample of 400 college students was selected and 120 of them had at least one motor vehicle accident in the previous two years.
For a given confidence interval, what is the interpretation of a 96% confidence level?
The cost accountant for Blue Pharmaceuticals has informed you that the company's materials quantity variance for the drug Allegro was exactly equal to its materials price variance for the year.
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
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