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The monthly starting salaries of students who receive engineering degrees have a standard deviation of $600. What sample size should be selected so that there is 0.95 probability of estimating the mean monthly income within $150 or less? _______________
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Use empirical Rule to evaluate proportion of costs within 2 standards deviations of mean. Write down these limits.
What percent of the Fords traveled 62.000 miles or less during the year?
What proportion of time will it take clean-up crew 56 or more hours for cleaning plant? Define the lower and upper limits of interval.
If the computed value for this problem is +2.33, and the level of significance is 0.05, can we conclude that the recall proportions for the two commercials are same?
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
Establish a 99% confidence interval for the difference in the proportion of suburban and urban housewives who own IPod.
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
A researcher measures a response variable Y and explanatory variable X on each of several objects. A scatterplot of the measurements is as follows.
Illustrate the regression model and predict it. The following table shows the yearly maintenance costs for several cars, as well as their age.
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
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