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Q1) Assume average puppy weighs 10 pounds. Sample of 10 puppies yields sample mean of 13.2 pounds and sample standard deviation of 2.78 pounds. Suppose population standard deviation is known to be 5.25. You wish to test whether sample mean varies from population mean of 10 pounds at 5 percent level of significance using two-tailed test. Compute test statistic for the sample data.
Q2) Woody is interested in determining if workers are more concerned with job security or pay. He gains cooperation of 30 individuals who work in different settings and ask each employee to rate his or her concern about salary levels and job security on scale from 1-10. (1=no concern and 10 = ultimate concern.) Woody's excel data file under contains 30 cases, one for each employee. Find out if employees are significantly more concerned about one area or other.
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
If the amount of cosmic radiation to which a person is exposed while flying by jet across the US is a random variable having the normal distribution with µ=5.35 mrem, and σ = 0.59 mrem.
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
When a sample mean is greater than the true, population mean, the resulting difference is called:
Assume P1 and P2 move simultaneously. Represent this game in normal form.
For a regional survey of suburban households to obtain data on television viewing habits, a statistical sample of suburban areas is first selected. Within the chosen areas, statistical samples of whole blocks are selected; and within the selected..
Select a random variable to represent the category. Produce a probability mass function for that variable, and use it to compute the mean, the median and the variance of the data in the data set. Show the probability mass function, both in tabular..
We have a deck of 52 playing cards. What is the probability of drawing?
Explain finding value of test statistic for the given data also interpret the result. Can Mr. Ratter compute which the mean weight of the bags is less than 50 pounds.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
Based on the data, determine the 95 percent confidence interval evaluate for true population mean?
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