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The current advertising campaign for a major automobile brand would be changed if fewer than 70 percent of the consumers like it.
a. Formulate the null and alternative hypotheses.
b. Which statistical test would you use? Why?
c. A random sample of 300 consumers was surveyed, and 204 respondents indicated that they liked the campaign. Should the campaign be changed? Why or why not?
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
Find the test statistic P-value, and critical value, and state the final conclusion.
For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
With this important detail, are there any significant differences with LSD?
To perform a certain type of blood analysis, lab technicians must perform two procedures. The first procedure requires either 1 or 2 separate steps, and the second procedure requires either 1, 2, or 3 steps. a) List the experimental outcomes assoc..
Determine change in average number of weekly viewers from to?
Compute the proper measure of association of smoking and lung cancer.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the ..
An election coming up next week promises to be very close. In fact, assume that 50% are in favor and 50% are against. Suppose you conduct a poll of 791 randomly selected likey votes. Approx. how different will the percent in favor (from the poll) ..
Construct a test of 20 objective type items in your subject. Administer test to a group of 50 students conduct an item analysis and write a report. Explain the meaning of co-efficient of correlation. Why does the homogeneity and heterogeneity of sco..
Compute mean, standard deviation, coefficient of variation and 5 key percentiles for these data.
Perform a significance test to see if there is a relation between mortality and duration of employment in the group hired AFTER 1945 and report a p-value.
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