MystatLab MAT220.3s x Do Homework Tamera x D Mathway I Math Problen x C The Read
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MystatLab MAT220.3s x Do Homework Tamera x D Mathway I Math Problen x C The Reading speed of s x C Secure https://www.mathd.com/Student/PlayerHomework aspx? homeworklda 426597466&questionld; 8&flushed; false&cld; 4459264&back; DoAssignmentsaspx MAT220.35: Statistics IMOD5 ONLINE (5/1-6/25/17) Tamera Sevene 6/23/17 1:55 PM Homework: UNIT 5 Section 8.1 Homework Save 7 of 9 (9 complete Score 0.33 of 1 pt HW Score: 59.26%, 5.33 of 9 pts 8.1.25-T Question Help HCH The shape of the distribution of the time required to get an oil change at a 10-minute oil-change facility is unknown. However, records indicate that the mean time is 11.1 minutes, and the standard deviation is 3.3 minutes. Complete parts (a) through (c) (a) To compute probabilities regarding the sample mean using the normal model, what size sample would be required? O A. Any sample size could be used. O B. The sample size needs to be greater than or equal to 30. O C. The sample size needs to be less than orequal to 30, O D. The normal model cannot be used if the shape of the distribution is unknown. Click to select your answer and then click Check Answer. parts Check Answer remaining A o de 55 PM Ben e 9 pe here to searchExplanation / Answer
As the sample size increases, all type of the samples tend to follow Normal Distribution.
In general we assume that a large sample consists of 30 observation and large sample can be converted into normal sample by normal Approximation.
Hence, a sample size equal to or greater than 30 is good to be assumed as a normal distribution.
Hence, the answer is option B
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