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A company that has a large number of supermarket grocery stores claims that customers who pay by personal checks spend an average of $87 on groceries at these stores with a standard deviation of $22. Assume that the expenses incurred on groceries by all such customers at these stores are normally distributed.
a) Find the probability that a randomly selected customer who pays by check spends more than $114 on groceries.
One-way Analysis of Variance (ANOVA) test - How many treatments are there and What is the total sample size?
Formulate the null and alternative hypotheses for this application.
Find out the crude death rate, age specific death rate, standard death rate and adjusted death rate.
In Excel, which of the following functions is used to conduct a hypothesis test (using the p -value) for a population variance
In an experiment in which a die was rolled 188 times it was counted up how many times each face came up. The results are as follows:
Test the hypothesis that the true Pearson correlation (p) is significantly different from zero. Provide a (p) value (two-tail) n=12. Correlation intake is .448 for the two recording methods.
High precision titanium spheres are popular components in manufacturing of ball bearings. A factory has ordered a shipment of 5000 titanium spheres from aboard. It is found that the shipment has a mean radius of 1.5 cm with a standard deviation ..
Find the value for the correlation coefficient r.
Can the company claim that they are faster than the average utility?
Calculate estimated Cohen's d to measure size of treatment effect.
Sample data recently collected indicate that Dough Boy's crusts average 30 centimeter in diameter, with a standard deviation of 1.1 centimeters.
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
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