inversecdf(normaldist (μ,o)p) The length of wear on Spinning Tires is normally distributed with a mean of 60,000 miles and a standard deviation of 5,000 miles. What is the probability that a tire lasts more than 72,000 miles? What is the probability that a tire lasts less than 51,000 miles? What is the probability that a tire lasts between 53,000 and 67,000 miles?
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- Pond’s Age-Defying Complex, a cream with alpha-hydroxy acid, advertises that it can reduce wrinkles and improve the skin. In a study published in Archives of Dermatology (June 1996), 33 women over age 40 used a cream with alpha-hydroxy acid for twenty-two weeks. At the end of the study period, 23 of the women exhibited skin improvement (as judged by a dermatologist). A.) What is the parameter being used in this problem?Dependent or Independent? Listed below are systolic blood pressure measurements (mm Hg) taken from the right and left arms of the same woman at different times (based on data from “Consistency of Blood Pressure Differences Between the Left and Right Arms,” by Eguchi et al., Archives of Internal Medicine, Vol. 167). Are the data dependent or independent?Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results were: Aptitude Score Frequency 0 2 1 3 2 2 3 2 4 3 5 4 The mean (¯xx¯) aptitude score: (Please show your answer to 1 decimal place.)The median aptitude score: The mode aptitude score: (Please separate your answers by ',' in bimodal situation. Enter DNE if there is no mode.) Hint: Textbook Measures of Center
- Every year, the students at a school are given a musical aptitude test that rates them from 0 (no musical aptitude) to 5 (high musical aptitude). This year's results were: Aptitude Score012345Frequency1344414 The mean (¯xx¯) aptitude score: (Please show your answer to 1 decimal place.) The median aptitude score: The mode aptitude score: (Please separate your answers by ',' in bimodal situation. Enter DNE if there is no mode.)research team wants to investigate the impact of increased sun exposure to a decrease in depression. In order to do so, the team gathers a SRS of 124 individuals with a sample average score on the Geriatric Depression Scale (GDS) of 7.5 from a population with σ=.4 after consistent sun exposure above 7 hours a day. Assume a clinical diagnosis for depression can only be given with a GDS score of 9. A) Is the team correct in their hypothesis? B) State and interpret your results.Ride services are on the rise, such as Uber and Lyft. You wondered if the recent news reports of crime occurring with these ride services impacted the usage of them, especially with women. You decide to conduct a survey about ride service usage among male and female college students. The results showed that 19 males use ride services and 11 do not. While 12 females use ride services and 18 do not. Find the chi-square critical value:
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