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Thirteen undergraduate students were randomly selected from a university and their systolic blood pressure was tested. The sample mean and standard deviation were 122.9 mmHg and 10.4 mmHg respectively. What is the obtained t-score for this sample under the null hypothesis Ho: µ= 118?
A sample of 25 production employees has been tested twice on a standard test of manual dexterity. The average change in the time required to finish the test was a decrease of 1.5 minutes, with a standard deviation of 0.3 minutes. At the 0.05 level..
what is the probability of having the same number when rolling two dices? what is the probability of having at least
Use simulation to find the probability of the passenger changing seats five or more times before getting to his assigned seat.
question if the regression line is drawn as y c 1075x when x was 2 and y was 239 given that the intercept was 11.
Carry out a two-sample t-test to compare the mean time between occurrences of safety violations for operator "A" to that for operator "B"; carry out a second two-sample t-test comparing the means for operator "A" to that for operator "C". Are the..
question a random sample of five accidents resulted in the following number of persons injured 18 1512 19 amp 21.
What value of x is at the 60th percentile of the distribution? Equivalently, what is the value for which there
4 7 7 5 2 9 7 6 8 5 8 4 1 5 2 8 7 6 6 9. (a) Determine three quartiles and (b) draw box-and-whisker plot of the data.
The standard deviation is thought to be $400. How many card holders should be sampled? Your company charges a set dollar amount for each account in the sample.
What hypotheses should be tested, in terms of p, the true proportion of students who have missed a test because they overslept, in order for college officials to prove that the new academic policy is causing fewer students to be late for exams?
Management because of a firm's growth, it is necessary to transfer one of its employees to one of its branch stores. Three of the nine employees are women.
Carnival. A carnival game offers a $100 cash prize for anyone who can break a balloon by throwing a dart at it.
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