since leukocytes and erythrocytes are produced from the same precurs.pdf

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A patient with polycythemia, an elevated red blood cell count, would likely have an increased leukocyte count as well, since leukocytes and erythrocytes develop from the same precursor cells. In leukemia, a cancer of white blood cells, the leukocyte count would be elevated due to the uncontrolled multiplication of abnormal white blood cells in the bone marrow, which crowds out production of other blood cell types like red blood cells and platelets. Leukemia causes accumulation of cancerous white blood cells that interfere with normal blood cell production.

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since leukocytes and erythrocytes are produced from the same precursor cells, predict the change
in leukocyte count that might occur in a patient who has an elevated erythrocyte count
(polycythemia)?
predict the change in leukocyte count in a patient suffering from leukemia (cancer involving
leukotcytes)
Solution
In case of polycythemia i.e. increased RBC count, the patients also suffer from an elevated
leucocyte and platelets count. In case of leukemia which is a type of cancer of red bone marrow
where WBCs multiply uncontrollably but these WBCs remain abnormal. Continuous formation
of WBC causes accumulation of these cancerous cells in the red bone marrow and interferes with
the production of RBC, healthy WBC and platelets.

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You are conducting a study to see if students do better when they study all at once or in intervals. One group of 12 participants took a test after studying for one hour continuously. The other group of 12 participants took a test after studying for three twenty minute sessions. The first group had a mean score of75 and a variance of 120. The second group had a mean score of 86 and a variance of 100. a. What is the calculated t value? Are the mean test scores of these two groups significantly different at the .05 level? b. What would the t value be if there were only 6 participants in each group? Would the scores be significant at the .05 level? Solution A) Formulating the null and alternative hypotheses, Ho: u1 - u2 = 0 Ha: u1 - u2 =/ 0 At level of significance = 0.05 As we can see, this is a two tailed test. Calculating the means of each group, X1 = 75 X2 = 86 Calculating the standard deviations of each group, s1 = 10.95445115 s2 = 10 Thus, the standard error of their difference is, by using sD = sqrt(s1^2/n1 + s2^2/n2): n1 = sample size of group 1 = 12 n2 = sample size of group 2 = 12 Thus, df = n1 + n2 - 2 = 22 Also, sD = 4.281744193 Thus, the t statistic will be t = [X1 - X2 - uD]/sD = -2.569046516 [ANSWER, T VALUE] ******************************** b) Calculating the means of each group, X1 = 75 X2 = 86 Calculating the standard deviations of each group, s1 = 10.95445115 s2 = 10 Thus, the standard error of their difference is, by using sD = sqrt(s1^2/n1 + s2^2/n2): n1 = sample size of group 1 = 6 n2 = sample size of group 2 = 6 Also, sD = 6.055300708 Thus, the t statistic will be t = [X1 - X2 - uD]/sD = -1.816590212 [ANSWER] For part A, the P value is p = 0.01750305 For part B, the P value is p = 0.099328388 Hence, Part A would be significant, but part B wouldn\'t. [ANSWER] ********************************** ***************************************************** Hi! If you use another method/formula in calculating the degrees of freedom in this t-test, please resubmit this question together with the formula/method you use in determining the degrees of freedom. That way we can continue helping you! Thanks! ********************************************.

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Which of the following developments have not helped to increase the importance of packaging cover time Which stage is the most costly one? In which stage are criteria such as adequacy of the technical - financial -manpower resources of the company and suitability to company objectives and mission are used to evaluate new product Which stage involves a feasibility study Which stage is most appropriate for \"informative\" advertising? At which stage should management make a choice between skimming and penetration In which stage is \"rejuvenation\" most likely to occur (if h does)? At which stage is heaviest price competition most likely to occur? Which stage is the right time for starting to plan a new product introduction? At which stage should product differentiation be at its lowest level? At which stage do profits reach their highest level? A small confectionery (tath, Sekerleme, recel) manufacturer markets its jams and jel an agreed upon price every year provided that the label is changed into \"\"Sultan Ha following would be true Solution (8) (a) Need for better packaging has nothing to do with economic crises - the crises can impact the purchase decision with or without better & more attractive packaging. (9) (C) Concept development & testing is costliest because if the prototype developed fails, entire cost incurred goes waste. (10) (B) These are tested at Screening stage for suitability of ideas generated. (11) (D) It involves technical, economic & business feasibility analysis. (12) (A) (13) (B) (14) (D) (15) (C) (16) (C) (17) (A) (18) (B) (19) Question is partially visible & can\'t be answered properly..

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