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A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 12.7 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.
Is there sufficient evidence for concluding that true average repair time exceeds 200 min? Carry out a test of hypotheses using a significance level of .05.
Using Analysis of Variance (ANOVA) test at 5% level if there are important differences in mean sales calls made across the three branches.
Borst et.al. investigated the relation of ego development, age, gender, and diagnosis to suicidality among adolescent psychiatric inpatients.
State the hypothesis test (with the formula of test statistic) could be used to see if the show-up ratio of people booked tickets is larger than 0.7.
Which of these statements is NOT true about CPM and PERT?
A sample of 64 Atlanta consumers showed a mean quarterly water bill of $51 with a sample standard deviation of $12. At α = .05, does the Atlanta sample support the conclusion that above-average rates exist for this private water system?
Analyst computes production cost per unit in each order and averages these to get $50.
Sketch the distribution of sample means for sample of n = 25 scores from this population.
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
On average a certain intersection results in 3 traffic accidents per month. What is the probability that for any given month at this intersection
Conduct the following test using 95% level of confidence.
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
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