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Determine the margin of error that corresponds to the given values of n (times) and x (successes) and the degree of confidence: n=1400, x=420, 95%. Go 3 decimal places of precision. Does not want upper or lower limits wants to calculate value for E.
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
a) Compute a 95% Confidence Interval for the true population proportion of successes. b) Based on this analysis can you conclude that the new system meets the requirement? Explain your conclusion.
The population of lengths of aluminium-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
Evaluate probability values using normal distribution and How many students earned more than $36,000? _______
Use a two proportion z-test to perform the required hypothesis test. State the conclusion.
Using sample, determine a 98% confidence interval for mean weight of whole daily output.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life.
Determine the standard error of students that favoured the move.
Research question : At α = . 01, is degree of certainty independent of credits earned?
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
At the 0.05 significance level, can he conclude that number of absences has declined? calculate approximately the p -value.
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