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A certain insecticide kills of all insects in laboratory experiments. A sample of 10 insects is exposed to the insecticide in a particular experiment. What is the probability that exactly 3 insects will die? Round your answer to four decimal places.
Find a graph other than a histogram that shows the distribution of a quantitative variable in a newspaper or magazine article.
suppose you are interested in measuring the amount of time on average it takes you to make your commute to school.
Suppose you have to cross a train track on your commute. The probability that you will have to wait for a train is 15, or .20.
Calculate 95 percent and 99 percent confidence intervals for µ. (Round answers to 3 decimal places.) 95 percent confidence intervals for µ is
A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695.
Use Friedman test to find out whether there is evidence for significant difference between two population variance. Use .05 level of significance.
State the null hypothesis and determine the ANOVA table. What is the result of the F test? Apply Tukey's HSD test to see which means differ if the ANOVA was significant at the 5% level.
A company has developed a new type of lightbulb and wants to estimate its mean lifetime. A simple random sample of 101 bulbs had a mean lifetime of 750.2
At the 1% significance level, can it be concluded that the current distribution of responses differs from that of a year ago ?? Formulate and test the appropriate hypotheses. Use the critical value approach.
A survey is giving to a group of individuals in order to better under how many hours per week they work per day and to see if this has an effect on their productivity levels. When the employees are given the survey, some decide to answer, on avera..
The scores on the LSAT are approximately normal with mean of 150.7 and standard deviation of 10.2. Find the 35th percentile of the LSAT scores.
Cylinder and bucket combined as there are in the box, and twice as many in the box as there are in the bucket, how many balls are there in the cylinder?
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