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Suppose one examines 53 rock samples with mean iron concentration being 0.0026 grams. Let the standard deviation be 0.001 grams. Determine a 95 % confidence interval for the iron concentration.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not
At.01 significance level, is there difference in mean number of times men and women order take-out dinners in month? Determine the p -value?
where p is the binomial probability of returning a completed survey, and log is the natural logarithm. The multiple logistic regression output from fitting this model is given below.
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
Find the probability that a women develops breast cancer given that she has a family history of breast cancer._____________
At.01 significance level, can we conclude that 30-year mortgage rate for small banks is less than 6%? Evaluate the p-value.
A bank's loan officer rates applicants for credit. The ratings can be described by a Normal model with a mean of 200 and a standard deviation of 50.
What is your conclusion regarding null hypothesis?
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
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