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According to the data from the College Board, the mean quantitatigve SAT score for female college bound high school seniors in 2009 was 500. Suppose that SAT scores are approximately Normally distri
Suppose a certain engineering class is given midterm examination. The probability of student studying for exam is 0.7. Of those students who study, the probability of their passing midterm is 0.9. I
A poll is given, showing 40% are in favor of a new building project. If 3 people are chosen at random, what is the probability that exactly 1 of them favor the new building project?
In a mid-size company, the distribution of the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 36 and a standard deviation of 4.
About 9% of the population has a particular genetic mutation. 900 people are randomly chosen. Determine the standard deviation for the number of people with the genetic mutation in such groups of 900.
About 5% of the population has a particular genetic mutation. 500 people are randomly selected. Determine the mean for the number of people with the genetic mutation in such groups of 500.
Find the probability that overbooking occurs_________? Find the probability that the flight has empty seats_________?
Determine the % of women meeting height requirements? Determine the % of men meeting the height requirements?
A teacher randomly assigns the 20 students in her class to study groups, each with 5 students. If there are 10 boys and 10 girls, what is the probability that two of the study groups have all boys a
Suppose an equal number of male and female employees at the manufacturing plant and that the salaries of 30 male and 30 female for children at random for comparison enter the male and female data in
Assume that you've 12 tennis balls in a black box. Each time when you go to play tennis, you randomly choose three balls one by one (assume that you cannot see the ball until you pick it out of the
An apple processor will reject any shipment of apples that contain more than 10% brused apples. From a shipment, the processor randomly selects 180 apples and finds 22 of them to be brused.
Approximately 8% of North American males are color blind. If you? Select men, one at a time, and test them for colorblindness, what is the probability that the first one you find will require 3 men
In 1997, a survey of 940 households showed that 144 of them use e-mail. Employ those sample results to test the claim that more than 15% of households use e-mail. Employ a 0.05 significance level. U
Suppose that the significance level is ?=0.05. Employ the given information to determine the P-value and the critical value(s).The test statistic of?
The probability that certain event A takes place in given run of an experiment is 0.3. The outcome of each run of this experiment is independent of outcomes of other runs. If the experiment is run
The probability that a certain event A takes place in a given run of an experiment is 0.3. The outcome of each run of this experiment is independent of the outcomes of other runs.
A paint company claims their paint will be completely dry in 45 minutes after application. Currently, customers have complained drying times are longer than claimed 45 minutes. A consumer advocate g
Run a linear regression (in Excel) with the data in the table shown above. The independent variable is population and the dependent variable is expenditure.
The normal distribution has two points of inflection. If the total area is 100%, what is the area under the normal curve between the two points of inflection?
The annual premium of a special kind of insurance starts at $1000 and is reduced by 10% after each year where no claim has been filed.
In the recent study of the effectiveness of popular diet plans, subjects were given a numerical score of how well they adhered to the diet, as well as having their weight loss measured.
Assume you record data upon these five variables for every student in your class: place of residence (dorm, apartment, with parents), GPA, gender, IQ score, and has athletic scholarship (yes or no).
A political pundit argues that "given the current rate of unemployment, a year from now the unemployment rate will be 15 percent". This argument suffers from.
In a study reported in the September 24, 2007, of Archives of Internal Medicine, German researchers stated a study conducted on 162 German adults suffering from chronic low-back pain.