help would be appreciated Which of the following cannot be a

Which of the following cannot be a probability? Identify the given random variable as being discrete or continuous. The braking time of a car Determine whether the given procedure results in a binomial distribution. If not state the reason why. Choosing 8 marbles from a box of 40 marbles (20 purple, 12 red, and 8 green) one at a time without replacement, keeping track of the number of red marbles chosen. A quality control analyst wants to examine thermometers that give readings in the bottom 4%. Find the reading that separates the bottom 4% from the others. A police department reports that the probabilities that 0, 1, 2 and 3 burglaries will be reported in a given day are 0.49, 0.40, 0.10, and 0.01, respectively. Assume that a study of 500 randomly selected school bus routes showed that 478 arrived on time. Is it \"unusual\" for a school bus to arrive late? A survey for brand recognition is done and it is determined that 68% of consumers have heard of Dull Computer Company. A survey of 800 randomly selected consumers is to be conducted. For such groups of 80 would it be unsual to get 521 consumers who recognize the Dull computer company name?

Solution

Q5.

Mean ( np ) =1214.647
Standard Deviation ( npq )= 2377*0.511*0.489 = 24.3713
Normal Distribution = Z= X- u / sd                   

About 95% of the area under the normal curve is within two standard deviations of the mean. i.e.  
(u ± 2*s.d)  
So to the given normal distribution about 68% of the observations lie in between  
=[1214.647 ± 2 * 24.3713]  
= [ 1165.904, 1263.39 ]  
  
Q6.B. -1

Q7.
A. Continuous