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The sociologist surveyed households in aneighboring town. The random variable x represents the number of dependent children in house holds.
Statistics and Probability, Statistics
Suppose that a certain college class contains 65 students. Of these, 35 are seniors, 33 are biology majors, and 5 are neither. A student is selected at random from the class. (a) What is the probability that the studen ...
In one town, 24% of all voters are Democrats. If two voters are randomly selected for a survey, find the probability that they are both Democrats. Round to the nearest thousandth if necessary.
In an investigation of environmental causes of disease, data were collected on the annual mortality rate ( deaths per 100,0000) for males in 61 large towns in England and Wales. In addition, the water hardness was record ...
A teacher wants to estimate the average pa of all teachers in a district. She wants to be 95% sure her estimate is correct. The standard deviation is $1,000, how large must her sample be to be accurate within $200? Pleas ...
Name and explain the contributions of three Abolitionists that supported and helped African Americans before the Civil War fight slavery?
Suppose that the number of men equals the number of women, and that Vera is last on the preference list of every man. Prove that under every stable matching, Vera is matched to the same man. Who is the unlucky guy?
Thirteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and standard deviation were 80.9 mmHg and 2.1 mmHg respectively. What is the obtai ...
Ship Collisions are rare in the Houston Ship Channel. The mean is .8 collisions in 6 months What is the probability of no collisions in 6 months. What is the probability of one collision in a year?
A person goes to his office everyday. He has a single umbrella. When he is home and the umbrella is home, he can choose to bring it. He will certainly do so if it is raining, but must decide what to do if is not raining, ...
A bakery was taken to court for selling loaves of bread that were underweight. These loaveswere advertised as weighing 24 ounces. In its defense, the bakery claimed that the advertisedweight was meant to imply not that e ...
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