Considering that unusual values are outside the interval μ-2σ, μ+2σ, is 20 females out of 401 females with lung cancer development unusually low or not? Show calculations.
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Considering that unusual values are outside the interval μ-2σ, μ+2σ, is 20 females out of 401 females with lung cancer development unusually low or not? Show calculations.
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- pter Question 3, 7.2.7 > Find the critical value za/2 that corresponds to a= 0.08. ... Za/2= (Round to two decimal places as needed.)I need help with all parts of this queestion 6, the select options for C is greater thna or less than, and is or is notI need help solving this problem in R. The size of the left upper chamber of the heart is one measure of cardiovascular health. When the upper left chamber is enlarged, the risk of heart problems is increased. The paper ("Left atrial size increases with body mass index in children")[https://www.ncbi.nlm.nih.gov/pubmed/19147240] (International Journal of Cardiology [2009]) described a study in which the left atrial size was measured for a large number of children age 5 to 15 years. Based on this data, the authors concluded that for healthy children, the left atrial diameter was approximately normally distributed with a mean of 26.4 mm and a standard deviation of 4.2 mm. i) Use `plotDist` to draw the probability density function of the left atrial diameter. ii) Generate 50 sample measurements of the left atrial diameters and plot the measurements using a histogram. iii) Approximately what proportion of healthy children have left atrial diameters less than 23.5 mm?
- Below is data of lobster sales volume from a seafood company. We're are using exponential smoothing (α = 0.5) and 3-year moving average to forecast it. a) Fill the blanks above and write your processes below. b) What are the mean absolute deviations (MADs) of the two methods? Whichmethod will you choose based on the results? *Please solve for a-b, either type your work and answers or write them neatly on paper* thank you!Use the following data to answer question 8 - 12. A number of studies have claimed evidence that the first-born in a family is, on the whole, more likely to be "successful" than later-borns. A study along this direction compared the IQs of a random sample of 80 first-borns with those of an independent random sample of 105 later-borns. The data are summarized below: Sample size Sample mean Sample SD First-borns 80 112 7.2 Later-borns 105 108 8.0A medical social worker is interested in examining the relationship between patients who receive social support by family members (yes/no) and the patients’ outcome (failure/success). She collected data over a period of a month (N=100). A chi square analysis revealed the following: χ2= 5.65, df = ?, p = .01. 1. Was a chi-square analysis appropriate to analyze these variables? How do you know?
- You are conducting a study to see if the proportion of women over 40 who regularly have mammograms is significantly more than 82%. With H1 : p >> 82% you obtain a test statistic of z=1.203z=1.203. Find the p-value accurate to 4 decimal places.p-value =Suppose X~N(186,19) and Z~N(0,1). If z = 1.24, what is it on an X scale? Express your answer to two decimal places (ex: 123.45).You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly less than 0.77.With H1 : p << 0.77 you obtain a test statistic of z=−1.477z=-1.477.Find the P-value accurate to 4 decimal places.P-value =
- Please solveA large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period. Single Policyholders Married Policyholders 721 = 575 n2 = 740 Number making claims = 115 Number making claims = 111 a. Use α = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value p-value We can conclude (to 2 decimals) X (to 4 decimals) that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number.How do I solve
