DS201_Lab8_rachelspence.ipynb - Colaboratory

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to mheducation.com/ext/map/index.html?_con3Dcon&external_browser%3D0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/questio... Exam i Saved Help Save & Exit Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 35 minutes and a standard deviation of 4 minutes, while method B has a mean of 39 minutes and a standard deviation of 2.0 minutes. (a) Which procedure is preferred if the procedure must be completed within 35 minutes? O Method A O Method B 1.20 O Either Method (b) Which procedure is preferred if the procedure must be completed within 45.0 minutes? O Method A Method B O Either Method (c) Which procedure is preferred if the procedure must be completed within 43 minutes? O Method A O Method B O Either Method 1 < Prev 19 of 19 Next O # w A ere to search 45 F Rain showers

Study Finds Benefit of Tablet Every Other. Day Is Much Greater Than Expected Ву HAROLD M.SCHMECK Jr. A major nationwide study shows that a single aspirin tablet every other day can sharply reduce a man's risk of heart auack and death from heart at- tack. The lifesaving effects were so dra- matic that the study was halted in mid- December so that the results could be reported as soon as possible to the par- |ticipants and to the medical profession in general. The magnitude of the beneficial ef- fect was far greater than expected, Dr. Charles H. Hennekens of Harvard, principal investigator in the research, said in a telephone interview. The risk of myocardial infarction, the technical name for heart attack, was cut aimosi in half. 'Extreme Beneficial Effect A special report said the results showed "a statistically extreme benefi- ciał effect" from the use of aspirin. The report is to be published Thursday in The New England Journal of Medicine. In recent years smaller studies have…

An excess of high values for the cases distributed on a graph results in a positive skew in the data?

A librarian believes that most books are kept longer or shorter than the allowed time of 3 weeks. What is the alternative hypothesis?(THE AVERAGE TIME A BOOK IS KEPT 3WEEKS,  IS DIFFERENT FROM 3,  WEEKS, LONGER THEN 3 WEEKS) What is the null hypothesis?( AVERAGE TIME KEPT, DIFFERENT OR  LONGER_

Calculate the appropriate test statistic.

Compute the value of y^ when a student spends 36 hours reading. Give your answer precise to one decimal place. Avoid rounding until the last step. ?̂ =                       points     Identify all of the true statements regarding the interpretation of  y^ when x=36. The value of y^ is:   A) the predicted number of students that read for 36 hours.   B) an unreliable prediction of a language test score because the value of 36 hours is outside the scope of the model.   C) the language test score that any student who reads for 36 hours will obtain.   D) the language test score that predicts the reading time to be 36 hours.   E) a predicted value of the language test score if a student reads for 36 hours.

Relatively minor repetitive impacts to the head such as those experienced by elite male soccer players when hit-ting a soccer ball with their heads may cause brain dam-age, according to the Journal of the American Medical Association. One indicator of mild brain injury is calledradial diffusivity. The radial diffusivity measurements oftwelve right-handed male soccer players were comparedto those of eleven competitive swimmers (who are notlikely to have repeated head impacts). Which type of plotwould not be appropriate for assessing the differencebetween the two groups?A) Stacked dotplots, one for each group, on the sameaxisB) Side-by-side boxplotsC) Stacked bar graphsD) A back-to-back stem-and-leaf plotE) A pair of histograms, one above the other, on the sameaxis. www.medpagetoday.com/Neurology

What is the correlation between the sample and the population in the Central Limit Theorem.  Please, mention the two important formulas that correlate?

A sample of 120 employees of a company is selected, and the average age is found to be 37 years. Parameter or stasistic?

Geckos are lizards with specialized toe pads that enable them to easily climb all sorts of surfaces. A research team examined the adhesive properties of 7 tokay geckos. Displayed are the toe-pad areas (in square centimeters, cm^2) for this sample.  5.6, 4.9, 6.0, 5.1, 5.5, 5.1, 7.5 which of these ranges must a value fall outside of to be considered an outlier according to the 1.5x IQR rule? A. 5.10 to 6.00 b. 4.20 to 7.35 c. 3.75 to 7.35 d. 4.90 to 7.50

A company makes auto batteries. They claim that 81% of their LL70 batteries are good for 70 months or longer. Assume that this claim is true. Let  p^ be the proportion in a random sample of 90 such batteries that are good for 70 months or more.

Show all work/steps! You must use JMP to analyze the data. Dnegsbni iw enseM 1. Does the bat make a difference? This was a question of interest at the regional little league monthly meeting. To test whether the more expensive bats do increase the average distance hit, ten little league batters of the same age were randomly chosen. The batters hit ten balls with the top of the line bat and after a rest; hit ten balls with the lower price bat. The data below represents the dis- tance hit in feet for the batters. At the 5% significance level, does the evidence suggest that the top of the line bat does increase the average distance hit versus the lower price bat? SRmites Jalog an Top of the 69.9 Line Bat 59.2 58.9 58.7 63.2 62.5 66.5 70.4 65.9 55.5 A Lower 59.2 61.2 52.6 54.3 58.1 62.3 56.5 62.4 53 61.8 Price Bat oitudhaib zli bnotalts 125T 2. Does owning an indoor dog really help bring down borderline high svstolic blood pressure? To

A government's department of transportation requires tire manufacturers to provide performance information on tire sidewalls to help prospective buyers make their purchasing decisions One very important piece of information is the tread wear index, which indicates the tire's resistance to tread wear A tire with a grade of 200 should last twice as long, on average, as a tire with a grade of 100 A consumer organization wants to test the actual tread wear index of a brand name of tres that claims "graded 200" on the sidewall of the tire A random sampie of n 18 indicates a sample mean tread wear index of 195 8 and a sample standard devation of 21.4. Complete parts (a) and (b) below Click.bere to.view.Dage.1of.the.table. of the critical.values of t Click here to view Rog0 2 of the table of the cntical.values.of.t a. Is there evidence that the population mean amount is different from a grade of 200? (Use a 0 10 lovel of significance)

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