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Let x be a random variable that represents the commute time of teachers in a large urban area. If x is normally distributed with a mean of 46 minutes and a standard deviation of 5 minutes, find the commute time which is at the top of the bottom 25%.
A. 40.12 minutes
B. 41.38 minutes
C. 42.63 minutes
D. 43.81 minutes
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
How large a sample should be taken if the desired margin of error E is:
Find the equation for the regression line for the data, and predict the final grade of a student who misses 3.5 days.
Obtain a test statistic and p -value. Interpret the results at α = .01.
The hypotheses tested by the one-way ANOVA F test - Evaluate the P-value of the ANOVA F test
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain how your answer could change if you knew returns followed a skewed distribution instead of a normal d..
Use Bayes's rule to find the conditional probability that Julianne is a carrier, given that she and Jason have one child who does not have cystic fibrosis.
Test the manager's claim at 5% and 1% significance level tests.
Temperature in certain city for the month of June follows a uniform distribution over the interval 61° F to 91° F. Find the temperature which 90% of the June days exceeds?
What advantage does correlation have over a cross-tab?
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