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Perception of Time- Randomly selected statistics students of the author participated in and experiment to test their ability to determine when 1 min(or 60 seconds) has passed. Forty students yeilded a sample mean of 58.3 sec. Assume σ that standard deviation = 9.5 sec.
The bank wants to find out the waiting time of their customers during the Friday evening hours from 5pm to 8pm. Using the data in ungrouped form, compute the Standard Deviation, using the computational formula.
Write a one-page report to Ms. Gupta presenting your conclusions regarding the market performance of Brand 1.
The administration of Midwest State University wants to know if arrangement of chairs affects student participation in classrooms. What would be a good operational definition of the dependent variable in an experiment designed to measure this rela..
What is the probability the circuit will last more than 3000 hrs. What is the probability the circuit will last between 2500 and 2750 hours and what is the probability the circuit will fail within the first 2000 hrs.
You are the production manager of a company. Parachutes are woven in your factory using a synthetic fiber purchased from one of four different suppliers. The most important outcome for parachutes is strength of the fabric.
A psychologist has designed a questionnaire to measure individuals' aggressiveness. Assume that the scores on the questionnaire are normally distributed with a standard deviation of 80.
The specification limits are set between 15.8 and 16.2 ounces.
Evaluate the factor effects. Find out which factors are significant in explaining yield.
A doctor believes that the variance of systolic blood pressure is 470. A random sample of 20 patients found a variance of 525. What is the smaller critical value that would be used in a hypothesis test at a .05 significance level?
Create a 90% confidence interval for mean score on this placement exam for all students.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of real life situation.
For a normal distribution, the probability of randomly selecting a z-score greater than z = -2.00 is p = .0228.
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