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When we make inferences about the difference of two independent population proportions, what assumptions do we need to make? Mark all that apply.
Develop a 95% confidence interval for proportion of companies that informally monitor social networking sites. Interpret interval constructed in a.
In the random samples of 12 from each and every two normal populations, we found the following statistics: (X1)=74,(X2)=71,S1=18,S2=16. Test with ?=.05 to find whether we can infer that the population
Assume that the number of years car will run is exponentially distributed with the parameter µ = 1/4. If Prosser purchases a employed car today, determine the probability that it will still ru
The following sample observations were randomly chosen.
A random sample of five observations from first population resulted in standard deviation of 12. A random sample of seven observations from second population showed standard deviation of 7. At the .
GMAT scores for the current exam at university can be modeled with normal distribution that has mean 1000 and standard deviation 75. The university wanted to classify the lower 12.3% of scores as "n
When there is no interaction among population means in two-way design, the numerator of F ratio for interaction in data from an experiment expected to be:
Assume that the F ratio you've computed for one-way ANOVA is 23. Which of the following can you conclude? A computation error has probably been made (F values this high don't take place in real life)
Which of the following tends to rise the size of the F ratio in a RM ANOVA?
A school psychologist is interested in estimating the effectiveness of an antidrug film on the attitudes of eight-grade students. Each students' antidrug attitude is measured on a scale from 0
Find out the probability that the random sample of 50 bottles has mean fill volume of more than 2.005 liters? Round your answer in percent to one decimal place.
Do the test to see if sample is large enough to employ the normal approximation. Round your answer in percent to one decimal place.
Note that you're determine a probability for average enrollment of smaple, not for the enrollment of individual schools. Round your answer in percent to 1 decimal place.
A consumer research organization poll asked consumers if they trusted "eco friendly" labels oncleaning products. Out of 1000 adults surveyed, 498 responded "yes." We would like to test if the propor
When there is no interaction among population means in two-way design, the numerator of F ratio for interaction in data from an experiment anticipated to be:
An RM ANOVA on the certain set of data didn't attain statistical significance. What benefit would be derived from performing an independent groups ANOVA on the same data?
Assume that the F ratio you've computed for the one-way ANOVA is 23. Which of the following can you conclude?
Determine the probability that a random sample of 50 bottles has a mean fill volume of less than 1,995 liters? Round your answer in percent to one decimal place.
A 95% confidence interval for population proportion of Inuits whose meat as well as fish consumption consists of at least half country food is
Assume that the distribution of men's heights can be approximated by normal model with mean of 69 inches and standard deviation of 4 inches. Then the probability that man is shorter than 67 inches i
A survey of 296 recent deliveries by Fumble Express shows that 131 were delayed. The 95% confidence interval for the proportion of delayed deliveries by is p Fumble Express
A professor would like to use the normal distribution to assign grades such that 5% of students receive A's. If the exam average is 62 with a standard deviation of 13, what grade must be the cutoff
What are the three main assumptions about a process that must be satisfied before performing a process capability analysis?