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It is estimated that .44 percent of the callers to the customer service department of Dell Inc. Will receive a busy signal. What is the probability that of today's 1200 callers at least 5 will receive a busy signal? Use the poisson approximation to the binomial.
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
Based on the Correlation following are Multiple choices question. If the correlation coefficient among two variables is equal to zero, what can be said of the variables X and Y.
With a single-sample t ratio, the null hypothesis states that:
Determine the following:Mean, Median and Variance.
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
Events A and B are mutually exclusive events defined on common sample space. If P (A) 0.5 and P (A or B) = 0.70, determine P (B).
To determine whether the mean is greater than 16 ounces using large sample test.
Test the given claim. Identify the null hypothesis, alternative hypothesis, test statistic, P-Value or critical value(s), conclusion about the null hypothesis, and final conclusion that addresses the original claim.
What is the null and alternative hypothesis? What is your final conclusion?
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Crystal Ball requires the following steps:
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