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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.
The professor wishes to use a random-number table to determine which letter choice should correspond to the correct answer for a question.
What is the null hypothesis? Use α =0.05. Compute critical value. Use α =0.05.
The population of lengths of aluminium coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.20 inches. A sample of four metal sheets is randomly selected from a batch. What is the possibility that t..
Find the probability of a Type II error if in fact the mean waiting time is actually 9.8 minutes.
Graph the distribution using a histogram. Calculate the mean and standard deviation.
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
If you draw one ball from the urn what is the probability that it is blue or white?
Below you are given a partial computer output based on a sample of 21 observations, relating an independent variable (x) and a dependent variable (y).
Salary information for a random sample of male and female employees of a large company is shown below.
Using the Census data, the OH Registry of Motor Vehicles reveal the subsequent about the Autos owned by the 10 families residing in Smallville.
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