Must the variable under consideration be normally distributed for you to use the ?-interval procedure or ?-interval procedure? Explain your answer
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- Must the variable under consideration be
normally distributed for you to use the ?-interval procedure or ?-interval procedure? Explain your answer.
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- What is the purpose of the Intermediate Value Theorem?Must the variable under consideration be normally distributed for you to use the z-interval procedure or t-interval procedure? Explain your answer.The company that manufactures car engine spark plugs has stated in its test that the durability of the plugs follows the normal distribution N(45000 km, 1600 km). After how many driving kilometers do the plugs have to be replaced if we want to be 99.9% sure that the plugs will not broken before replacement? Show your calculations in Excel cells, and justify calculations.
- A manufacturer producing cocacola drinks wanted to set the specification of production to achieve process capability. He set his Upper Control Limit (UCL) = 0.03, proportion of defective items as 0.02. Calculate the number of sample observations (n) to be used to ensure 99.74 of the value.A doctor in the oncology department of a hospital surveyed the breathing rateof cancer patients. The mean and standard deviation of breathing rates for a group of patients are 12 and 2.3 breaths per minute, respectively. State the theorem applied"proportion of the patients having breathing rates from 7.4 to 16.6 breaths per minute" and explain why this theorem is chosen.As the sample size decreases, the width of the interval decreases. increases. neither of the above; it depends on the situation.
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- can you briefly help me explained what happened in this Theorem? I already know that the distribution is postively skewed and not normal. What else happenend here? I just need to understand it more briefly. ThanksWhy ANOVA is known as the extension of T test. What is the relation between P valve and F value ?In a car fix station, the oil of the cars is changed with 15 minutes in average and standart deviation is 2.4 minutes. For the customer satisfication the manager initiates a company and offers 50% discount for the ones waiting for more than a predefined duration. In order to balance the expenditures the manager does not want the number of customers subjected to the discount more than 5%. Calculate the required minimum waiting time?