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A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special". The 100 customers spent an average of N25 in the store with a standard deviation of N6. The marketing manager had claimed that the average purchase by those responding to the coupon offer would be at least N20. Can this claim be rejected at a 1 percent level of significance?
Primary healthcare workers believe that anaphylactic shock reaction to immunization injections occurs with children in one case in two thousand.
Assume that correlation coefficient between 2 variables is nearly zero. What does this say about relationship between them?
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
In this research report you will be analysing a set of data of which can be found in an EXCEL file available for download in the Assessment section of the Blackboard site.
Find a 90% confidence interval for the mean decibel level µ for this type of transit vehicle.
Using the Census data, the OH Registry of Motor Vehicles reveal the subsequent about the Autos owned by the 10 families residing in Smallville.
Identify each of the random variables as continuous or discrete.
Is there meaningful relationship between grades and SAT scores? If student scores 450 on the SAT, what do youbelieve his or her GPA will be?
Single group post-test and internal validity threats - Answer the question either by writing the design name or by describing the design using standard notation
We assume that we have selected two independent random samples from populations having proportions p 1 and p 2 and that p-hat 1 = 800/1000 and p-hat 2 = 950/1000
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
If the variability of the filling machine is reduced to 0.025 ounce, verify that this will lower the required average amount of coffee to 4.050 ounces and yet keep 98 percent of the jars above 4 ounces.
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