a. Describe in words what features mostof the frequency distributions ofactual survival times have incommon, based on the box plots foreach group.b. Describe the differences in shape ofactual survival time distributionsbetween those for 1 to 5 monthspredicted survival times and those for6 to 24 months.c. Describe the trend in median actualsurvival time with increasingpredicted number.d. The predicted survival times ofterminally ill cancer patients tend tooverestimate the medians of actualsurvival times. Are the means of actualsurvival times likely to be closer to,further from, or no different from thepredicted times than the medians?Explain. 19. Accurate prediction of the timing ofdeath in patients with a terminal illnessis important for their care. Thefollowing graph compares the survivaltimes of terminally ill cancer patientswith the clinical prediction of theirsurvival times (data from Glare et al.2003).15234 5 67-9 10-12 13-24Clinical prediction (months)Whitlock & Schluter, The Analysis of Biological Data, 3e© 2020 W. H. Freeman and CompanyI I|II III ||5.Actual survival (months)

Answered: a. Describe in words what features most…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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2. What does it mean for a scatter plot to have a negative trend? O A. Higher c-values tend to go with higher y-values. OB. Higher -values tend to go with lower y-values. OC. The x- and y-values appear to be unrelated. OD. None of these are true.
This is only one question
Let the joint PDF of two RV x, y be: A, for-2≤a≤2, 0≤b≤1, fx,y (a, b) = {0, otherwise. Derive the value of constant A and calculate the probability of x and y being in the interval 0≤x≤1, 0≤ y ≤<1, respectively.
Answer the following questions using the separate rates X1,..., X20 and Y1,..., Y20 shown in Figure 1. (a) Carry out the calculations for a test of the hypotheses that the mean U.S. mortality rate On remained the same or increased from 2005 to 2015 against the alternative that the mean mortality rate decreased. State the hypotheses, test statistic, rejection region, and p-value. Do not interpret the conclusion of the test. (b) Compute a 99% confidence interval for the change in mean heart rate mortality. Do not interpret the interval.
Shape of the distribution of data can be visually assessed using which plot(s)? a. boxplot b. histogram c. scatterplot d. all of the above Potential confounders are issue in the following type of study design. a. Observational cohort studies b. Case-control studies c. Both observational cohort and case-control studies Subjects are recruited to take part in a study examining the effect of a new therapy to aid with smoking cessation for persons who smoke cigarettes. If a subject is followed until he/she stops smoking, their survival time is: a. Censored b. Excluded from the analysis c. Uncensored d. Survival time is zero, since the subject had the event of interest
18
8.Suppose you compare the mean of raw data and the mean of the same raw data grouped into a frequency distribution. These two means will be a. Exactly equal. b. The same as the median. c. The same as the geometric mean. d. Approximately equal.
b. As a basketball player, Rylee scored the following in her last 10 games: 34, 21, 21, 3, 12, 22, 21, 33, 15, 19. Which measure of central tendency would be best? Create a distribution graph. Discuss the data points on the x-axis and y-axis. Discuss the measures of central tendency.
What was the age distribution of nurses in Great Britain at the time of Florence Nightingale? Suppose we have the following information. Note: In 1851 there were 25,466 nurses in Great Britain. Age range (yr) 20-29 30-39 40-49 50-59 60-69 70-79 80+ Midpoint x 24.5 34.5 44.5 54.5 64.5 74.5 84.5 Percent of nurses 5.2% 9.5% 19.8% 29.1% 25.1% 9.4% 1.9% (a) Find the probability that a British nurse selected at random in 1851 would be 60 years of age or older. (Round your answer to three decimal places.)(b) Compute the expected age ? of a British nurse contemporary to Florence Nightingale. (Round your answer to two decimal places.) yr(c) Compute the standard deviation ? for ages of nurses shown in the distribution. (Round your answer to two decimal places.) yr
This is for my data analysis class. Please answer all parts of the question.
provide an interpretation of the the plots presented here. what do you learn about the data distribution? do any possible concerns emerge? Then, in two paragraphs, continue with an elaboration on the controlling idea, perhaps with an explanation, implication, or statement about significance.

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