Eliminated jobs in the past year
In the past year 17% of local businesses have eliminated jobs. If 25 businesses are randomly selected what is the probability that 5 or less have eliminated jobs in the past year?
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Assume that a sample of size 900 is to be taken from a population that contains 34% people older than 50.
A federal report find that a lie detector test given to truthful persons have a probability of .2 of suggesting that the person is deceptive. A company asks 12 job applicants to take a lie detect test. Suppose that all 12 applicants answer truthfu
You go to a store to get ice-cream. There are five types of cones, three types of ice-cream, and six kinds of toppings. You must choose a cone, a type of ice-cream, and exactly one topping. What is the number of possible choices?
Four samples of water were taken at five different locations along a river and measurements were obtained of the amount of E. Coli colonies within the water. Location 5 is the highest point on the stream and location 1 is the fruthest downstream.
The manager of a video library would like the variance of the waiting times of the customers not to exceed 2.30 minutes-squared. He would like to add an additional billing counter if the variance exceeds the cut-off
Develop the null and alternative hypotheses to determine whether the schedule adjustment reduced the average lateness time of 12 minutes.
A random sample of 15 accounting graduates indicated on average they had taken 139 credit units with a standard deviation of 3 units. While a random sample of 15 economics graduates showed an average of 137 units with a standard deviation of 2.7 u
The mean assembly time for a random sample of 36 carts, using the new method, was 40.6 minutes, and the standard deviation of the sample was 2.7 minutes. Using a 0.05 level of significance, can we conclude that the assembly time using the new meth
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