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When a sum of money is invested for a period of nine years at an interest rate of 7% per annum, the difference between the interest earned if calculated using the compound interest method (compounded annually) and the simple interest method is R334.16. What was the capital sum of the money invested?
A new process for producing synthetic diamonds can be operated at a profitable level only if the average weight of the diamonds produced by the process is greater than 0.5 karat.
Determine the probability that a sample proportion for n=30 is within 0.10 of the true population proportion of 0.40, which represents the proportion of cola drinkers who prefer a Coca-Cola drink.
In 74 of these samples, they detected DDTs with concentration levels up to 840 ng g-1 dw. Obtain a 95% con?dence interval for the proportion of total number of sediments with detectable DDTs.
What is the expected number of crimes that will be solved? What is the standard deviation?
construct 90 95 and 99 percent confidence intervals for the population mean and state the practical and problistic
Suppose the probability that a federal income tax return conatins an arithemetic error is 0.2. If 10 federal income tax returns are selected at random,
1.a study was performed to examine the personal goals of children in grades 4 5 and 6. a random sample of students was
For instance, one busy Midtown Manhattan center had a peak arrival rate of 172 customers per hour. A multiple-channel waiting line model with six ATMs showed that 88% of the customers would have to wait, with an average wait time between 6 and 7 m..
The following data represents the running time of films produced by 2 motion picture companies. Assume these are independent samples
Using the 0.10 level of significance, is there evidence that the mean shopping time at the local supermarket is different from the claimed value of 22minutes?
The Federal Government of Australia uses the cash rate to control the inflation rate in Australia. Is there statistical evidence to support such a policy?
a factory produces 1400 beams a day which are on average 2.5 defective. find the probability out of 70 beams inspected
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