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The paper "Answer Changing on Multiple-Choice Tests" (Journal of Experimental Education [1980]: 18-21) reported that for a group of 162 college students, the average number of responses changed from the correct answer to an incorrect answer on a test containing 80 multiple-choice items was 1.4. The corresponding standard deviation was reported to be 1.5. Based on this mean and standard deviation, what can you tell about the shape of the distribution of the variable number of answers changed from right to wrong? What can you say about the number of students who changed at least six answers from correct to incorrect?
Ages of Billionaires Predict the shape of the distribution of the ages of 20 billionaires. A typical value is about 54 years, but there is an outlier.
Decision rule which chooses alternative associated with smallest maximum opportunity loss is?
The probability the second truck is available is .51, and the probability that both trucks are available is .41: What is the probability neither truck is available?
Give an example in health care management where you would use probability statistics to determine an outcome such as providing raises based on certain financial goals being met?
In a simple random sample of 30 individuals, what is the probability that the total amount of asset income will exceed $18,000?
For each of the given quantitative variables, explain whether the variable is continuous or not.- Number of classes a student misses in a week.
Suppose you wish to estimate the mean pH of rainfalls in an area that suffers heavy pollution due to the discharge of smoke from a power
If X is a normally distributed random variable with mean -61 and standard deviation 22, find the value such that the probability that the random variable will be above it is 0.25.
Test-preparation organizations like Kaplan, Princeton Review, etc. often advertise their services by claiming that students gain an average of 100 or more points on the Scholastic Achievement Test (SAT). Do you think that taking one of those class..
Estimate and interpret the model: Salary = ß0 + ß1PC + ß2TD + ß3Age + e. Show that this model is preferable to a model that uses log of salary as the response
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p-value.
If there are 12 business-class passengers and 50 tourist-class passengers on a particular flight, what are the expected value of total luggage weight and the standard deviation of the total luggage weight?
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