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Among the best companies to work for in the US, 33% experienced double digit job growth, 49% experienced single digit growth, and 18% experienced no growth or decline. A closer examination of the 30 companies that make up the 30 industrials in the DJ Index showed that 15 had job growth in the double digits, 11 in the single digits, and only 4 had no growth or decline. Is there anything unusual about job growth among the 30 industrials? Use α = 0.05.
What kind of Chi-Square test is this?
Obtain a test statistic and p-value assuming equal variances. Interpret these results.
The personnel office at a large electronics firm regularly schedules job interviews and maintains records of the interviews. From the past records
If we assume that attention spans are normally distributed, find a 95% confidence interval for the mean attention span of children playing with this new toy. What is the lower limit of the confidence interval.
What sample size would be needed to estimate he population mean to within one-half standard deviation with 95% confidence?
On the basis of the sample results, can we conclude that the mean annual lease rate is higher in Hong Kong than in Paris? Develop appropriate null and alternative hypotheses.
Test research hypotheses that there is a difference in level of education between liberals and conservatives, set alpha at .01. Would your decision have been different if alpha were set at .05?
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
Body mass index is measured as the ratio of weight in kilograms to height in meters squared. Generate a 95% confidence interval estimate of the true BMI.
How many students should be surveyed if a 90% confidence interval is desired and the margin of error is to be only 3%?
answer the following questions relative to the following statementmedical inpatient unit is known to have a central
assume that a random sample is used to estimate a population proportion p. find the margin of error e that corresponds
an experiment was performed to investigate the keyboard feel on a computer crisp or mushy and the size of the keys
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