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Adam would like to buy a used car, and collected several data to evaluate the best model (such as age, price, weight, etc.) Thanks to a scatterplot, he established that the relation between age, and weight is somewhat linear. He caluculated that the correlation between age and weight is 0.514. Describe the association.
a. Weak linear relation in a positive direction
b. Weak linear relation
c. No evidence of relation
d. Strong linear relation in a positive direction
e. Weak linera relation in a negative direction.
A test indicates the presence of a particular disease 90% of the time when the disease is present and the presence of the disease 2% of the time when the disease is not present.
Is this statistically significant evidence that the true mean diameter is greater than 20 millimeters? Set up the hypothesis, and enter your P-value below, rounded to four decimal places.
Do you think it would be justified for people of certain racial or ethnic groups to be subject to additional security checks at airport check points?
Are the data sufficient to that the herb has a significant effect on memory? Use a two-tailed test with α = .05.
Reliable Furniture is a family business that has been selling to retail customers in the Chicago area for many years. They advertise extensively on radio and TV, emphasizing their low prices and easy credit terms.
Particular flight involving a jumbo-jet with 261 seats, the airline sells 270 tickets. What is the probability that the airline will not have enough seats for all the ticket holders who show for the flight?
The mean of a standard normal probability distribution.
For the data giben below, prepare a R-chart. Note that the sample size is three.
Suppose that 20% of the population has high blood pressure. If 7 people are randomly selected off the street, what is the probability that more than 4 of them do not have high blood pressure?
Figure out the necessary sample size to reduce sampling error to plus or minus $500. Do you need to have an estimate of the current mean income to answer this question? why or why not?
Two pain relief drugs are being considered. A random sample of 6 doses of the first drug showed that the average amount of time required before the drug was absorbed into the bloodstream was ??
Define the Linear programming problem (LPP)
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