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The average electric bill in a residential area is 72 dollars for the month of April. The Standard deviation is 6 dollars. If the amounts of the electric bills are normally distributed, find the probability that the mean of the bill for 15 residents will be less than 75 dollars.
Explain the effect that changes in η and β have on the shape of the Weibull density and the effect that they have on γ3 and derive an expression for the coefficient of skewness for the Weibull distribution.
Test the hypothesis that there is no difference between the means of retailers (α= .05). Select a multiple comparison test, if necessary, to determine which groups differ in mean sales (α= .05).
The closing price of a company's stock tomorrow can be lower, higher or the same as today's closed. Without any prior information that may affect the price of the stock tomorrow, the probability that it will close higher than today's close is 1/3
On a graph, the vertical difference between the observed and predicted values of the response variable for an individual is called the
Here are data on attitudes toward coffee filters made of recycled paper. The data was gathered from a random sample. What is the conditional distribution of opinion about quality of recycled coffee filters for buyers?
A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients.
Many retail stores offer their own credit cards. At the time of the credit application the customer is given a 10 percent discount on the purchase.
For each of following data sets, select the most suitable response from choices below the table. A strong negative linear relation exists.
According to a recently conducted survey, 90% of all drivers in Trinidad and Tobago claim to consistently driver over the legal speed limit.
Choose the proper conclusion regarding the claim that the population have different variances.
Brake Pads- A brake pad manufacturer claims its brake pads will last for 38,000 miles. You work for a consumer protection agency and you are testing this manufacturer's brake pads.
Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
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