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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?
significance testing. t-tests1. in the course of the thesis work a student develops a new approach for the solution of
Using the .05 level of significance: a) Is there a difference among types of gasoline? b) Is there a difference in the cars?
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
1. let x and y be bernoulli random variables. let z x ya. show that if x and y cannot both be equal to 1 then z is
consider the set of odd single-digit integers 13579.a make a list of all samples of sixe 2 that can be drawn from this
Also find information about blood donations and the percentage of each type donated. How do the charts compare? Why is the collection of type O blood so important?
a six-sigma black belt quality control engineer found that in a random sample of 140 printed circuit boards 18 are
The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
Find a 95% confidence interval for the true proportion of all medical students who plan to work in a rural community.
translate the following statements into equivilant formal expressionsa. some things are not owned by anyone.b. some
Suppose that the lives of all such bulbs have a normal distribution with a mean of 750 hours and a standard deviation of 55 hours. Let x (sample mean) be the mean life of range sample of 25 such bulbs.
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