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Survey: Cellular Phones According to an article appearing in The Wall Street Journal, about 35% of all U.S. households have a cellular phone. Suppose that you are conducting a survey of customer satisfaction regarding their cellular phone. If you called 11 households selected at random, what is the probability that:
a) Every household has a cellular phone?
b) More than four households have a cellular phone?
Extra college-level training, and rest of the sailors arn't accounted for. How does your sample compare to what you expected to determine? Define null hypothesis.
Two types of flares are tested for their burning times (in minutes) and sample results are given below.
A busy landscaping supplies company sells wood chips for garden mulch. The mulch is sold by the cubic metre and delivered to households in a small truck.
At the .01 level of significance, is the true mean greater than 10?
Given same values n=20, p=0.6, and x=17, calculate probability of x successes in n independent trails of experiment.
Find the test statistic value for testing the equality of proportion variances.
Determine the p-value; and at 95% confidence, test the above hypotheses.
What is the probability that the sample mean will be greater than M = 510. In symbols, what is p (M>510)?
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
Construct a grouped frequency distribution using six classes.
He argues that regression effect says people who do very poorly in their previous job tend to perform well in their next job. Is this what the regression effects? Describe in detail.
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