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There are 4 unrelated parts to this question. Justify your answers. If 8 identical blackboards are to be divided among 4 schools, how many divisions are possible?
Suppose Ralphie V's exam percentage on any exam at CU can be described by a random variable X where X~ N(75,52). for the following questions, where appropriate,express your answer in terms of ?, the
Calculate the Correlation coefficient, Coefficient of determination and SSE, and the Standard Error of Estimate.
A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs
ATP is sold by genetech that can be used as an anti clotting agent for heart attacks. It is very expensie and not 100% effective. A dose sufficent to dissolve a clot will cost 2500. In a 55 million
Suppose that Z is a random variable with a N(0, 1) distribution. Define a stochastic process via X(t) = (?t)Z, and note that for each t > 0, X(t) has a N(0, t) distribution. Is this Brownian moti
A Local school district claims that the number of school days missed by its teachers due to illness is below the national averge of u = 5. A random sample of 40 teachers provided the data below. at
Post office models the winodw's service times as unifomrly disributed between 1 and 7 minutes. Compute the total expected hourly cost of this post office window.
40 numbers are rounded off to the nearest integer and then summed. If the individual round-off error are uniformly distributed over (-.5, .5) what is the probability that the resultant sum differs f
A Local school district claims that the number of school days missed by its teachers due to illness is below the national averge of u = 5. A random sample of 28 teachers provided the data below. at
At a college, 70% of students are female, and 50 percent of students receive a grade of C. Twenty-five percent are neither female nor C students.Complete a probability matrix and answer the followin
A fast food outlet claims that the mean waiting time in line is less than 3.7 minutes. A random sample of 20 customers has a mean of 3.5 minutes with a standard deviation of 0.8 minute. if a = 0.05,
A researcher is investigating the relationship between personality and birth order position. A sample of college students is classified into four birth categories (1st, 2nd, 3rd, 4th, and later)and
Carry out the steps in constructing a confidence interval for a population proportion: define the parameter; check conditions; perform calculations; interpret results in context.
Provide an example of where you think a graphical display could be used incorrectly. What ramification(s) do you think could result from the graphical display in your example being used incorrectly?
Complete the table by computing total revenue, marginal revenue, and the price elasticity of demand. USE THE MID POINTS FORMULA.
The probability of pass a test is 0.76 at a particular school. Suppose we randomly select a class of 10 students from this school. The following questions deal with this class of 10 students. What
What's a difference between the z distribution and the t distribution?
The average magnesium concentratioin in ground water around Metro City is (mu)=65.6 parts per million (ppm) with a standard deviation of standard deviation of 10. The table below shows the gound wat
A survey of 1373 parents and 1343 students in grades 6-12 regarding the importance of science and mathematics in the school curriculum found that 50% of students thought that understanding science a
In a study of the effectiveness of a fabric device that acts like a support stocking for a weak or damaged heart, 110 people who consented to treatment were assigned at random to either a standard t
Annual starting salaries for college graduates with degrees in business administration are generally expected to be between $30,000 and $45,000. Assume that a 95% confidence interval estimate of the
A manufacturer claims that its televisions have an average lifetime of at least five years (60 months) with a population standard deviation of 7 months. 81 televisions were selected at random, and