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Question 5
A survey of fruit preference of northern and southern Australians was carried out.Researchers were interested to know whether Australians living in northern areas were more interested in tropical fruit because it was plentiful, as opposed to citrus and other fruit. A survey of 500 persons was carried out and the results are given below. Perform a χ2 test to see whether fruit preference and location in Australia are independent. Use a significance level of α= 0.05.
a. State the hypotheses that you are testing
b. Determine the critical value of χ2 and your decision rule
c. Calculate the χ2 test statistic for this data. (Show all workings)
d. State your decision and conclusion.
What is the probability that Susan passes on the first try? What is the probability that Susan first passes on the second try?
Based on sample data, the 95% confidence interval for the population mean is from $150 to $250.
How many cars must be randomly selected and tested in order to estimate the mean braking distance of registered cars in the United States.
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what was the product being analyzed using just the amount of rain and average temperature to predict quality in the
An educational psychologist is interested in knowing whether the experience of attending preschool is related to subsequent sociability.
nurses wondered if birth weights of babies are going up. they knew what the average birth weight of a baby last year
These 6 measurements are thought to adequately characterize the raw material. Also provided is a designation Adequate or Poor that reflects the process engineer's opinion of the yield from that lot of materials.
25% of the residents garden. If 5% of the residents play poker and garden, find the probability that a resident plays poker, given that they also garden.
a 95 confidence interval for a population mean was reported to be 152 to 160. if s 15 what sample size was used in this
Use the normal-theory method to test for significant differences in 12-month mortality between the two groups.
At the 0.05 level of significance, is there evidence that the population mean reimbursement was less than $100? Discuss the underlying assumptions of the test used in (a).
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