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Consider a sequence of independent Bernoulli trials with p=0.21. What is the expected number of trials to obtain the first success?
A real estate agent has 15 properties that she shows. She feels that there is a 40% chance of selling any one property during a week. the chance of selling any one property is independant of sellin
Draw a normal curve with a mean=100 and standard deviation =8. Label the mean, standard deviations and the inflection points
Do the data provide sufficient evidence to indicate a difference between and? Test using the two-sample independent t test with = 0.05.
A regional airline has been selling seats based on the assumption that the average passenger weighs no more than 180 pounds. A recent survey of n = 100 passengers gave a sample mean of 186 pounds wi
The researchers found a significant difference between the two groups (control and treatment) for change in mobility of the women with osteoarthritis (OA) over 12 weeks with the results of F(1, 22)
A resercher wishes to conduct a study of the color preferences of new car buyers. Suppose 40% of this population perfers the color green. If 12 buyers are randomly selected, what is the probability
The dean has released data on the gpa of 1000 students. He says that 85% have a gpa of 3.2 or above. The median was also 3.2 and the standard deviation was .3 and the average gpa was 3.4. Please com
At a raffle a total of 2000 tickets are sold at $10 each. The prizes awarded were &6000, $4000 & $2000. You buy 4 tickets. What is the expected value of your gain
The average mumber of speedind tickets written per year on Main street is 60. Use the poisson formula to determine the chances that 6 tickets will be written on main street in octobar
Is this an appropriate sampling scheme if the assignable cause in the process results in an instantaneous upward shift in the mean that is of very short duration?
Assume the random varible x has a binomial distribution with the given probability. Find the probability given the sample size. Round 3 decimals
What is the probability that the total amount of data generated by the network exceeds 3.6 GB? (approximate 0.8032). Notmore than what amount of data will be produced by the network with 99%probabilit
A certian school automatically accepts all applicants whose GMAT scores exceed 620. Approximately what proportion of all those taking the exam would qualify for admission into the school?
At a fast food restaurant, the daily demand for beef is normally distributed with a mean of 680 lbs and a standard deviation of 80 lbs. The manager would like to ensure that suffucuent beef is avail
A mass marketing company has received 14 enteries in its sweepstakes. they know that the probability of receiving a magazine subsucription with an entry form is 0.5
An airline analyst predicts an avergage monthly demand of 3,900 passengers and a standard deviation of 400 passengers on a particular plane route. Assume the monthy demand is approximately normally
In the new shipment, what is the expected number of misgapped plugs? What is the probability that there will be 50 or fewer misgaped plugs?
Consider a poll of sample size 1000. 53% of the sample indicated that they approved of a national playoff for Division I College Football. What is the lower bound of the 90% confidence interval?
Suppose that 40% of all college students smoke cigerettes. a sample of 14 is randomly selected. What is the probability that between 3 and 6 (both inclusive) students smoke?
For a matched pair t test of H0: ud =0. vs Ha: ud not equal to 0, a sample with n = 51 has the mean and standard deviation of the differences 1.8 and 3.9 respectively. What is the value of the test
Develop a point estimate of the proportion of people aged 65-69 who are working (to 2 decimals).
A certain insecticide kills 60% of all insects in the laboratory experiments. A sample of 8 insects is exposed to the insecticide What is the probablilty that 3 insects will die?
Find the domain and range for the relation W on {R} given by xWy if