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Suppose a marketing company wants to determine the current proportion of customers who click on ads on their smartphones. It was estimated that the current proportion of customers who click on ads on their smartphones is 0.42 based on a random sample of 100 customers.
Compute a 92% confidence interval for the true proportion of customers who click on ads on their smartphones and fill in the blanks appropriately.
ballast must weigh 150 kg. it can be made from two raw materials a with a cost of rs. 20 per unit and b with a cost of
the cooper auto repair center has just received a shipment of 1000 spark plugs from a supplier. in past shipments the
An auto manufacturing company wants to estimate the variance of miles per gallon for its auto model AST727. A random sample of 22 cars of this model showed.
Using historical records, the personnel manager of a plant has determined the probability distribution of X, the number of employees absent per day. Calculate the mean of the population.
Lyme disease is a disease carried by ticks, which can be transmitted to humans by tick bites. Suppose the probability of contracting the disease is 1100.
What are two risks of using SPC in decision making for an organization?
A company has two assembly lines, each of which stalls an average of 2.4 times per week according to a Poisson distribution.
a) Determine Katherine quantiles f,or this data. b) Determine the interquartile range for this data.
Why is the independence assumption in part c probably not realistic? Using a more realistic assumption, do you think the probability requested in part c.
The powder diet group had a mean weight loss of 42 pounds with a standard deviation of 12pounds.The liquid diet group had a mean weight loss of 45 pounds with a standard deviation of 14 pounds.
1. State the null hypothesis and the alternate hypothesis.
Age. In a study of how depression may affect one's ability to survive a heart attack, the researchers reported the ages of the two groups they examined.
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