A pharmaceutical company claims that they have a new drug that will significantly reduce the averagerecovery time for a particular operation. Until now the mean recovery time has been 21.7 hours. The next22 patients having this operation at a large teaching hospital are treated with the new drug and the averagerecovery time for these patients is found to be 20.3 hours with a standard deviation of 3.47 hours. Do thedata support the pharmaceutical company's claim? Test the appropriate hypothesis at a =0.10.(a). The null and alternative hypotheses areНо: р — 21.7Ha: µ > 21.7O Ho : µ = 20.3На:д < 20.3Но: р — 21.7На:и < 21.7O Ho : = 20.3Ha:ã < 20.3

The claim is that the new drug will significantly reduce the average recovery time for a particular…

Answered: (a). The null and alternative…

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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ol 106. Use the two scenarios presented in Figure 7.12 to answer the following question about the two sources of variability in ANOVA. 3.5 3.0 2.5 2.0 1.5 (i) HA: P₁ P2 ‡ P3 (iii) HA not all proportions are equal to this po 1.0 Figure 7.12: Within vs Between Variability in ANOVA onnisth Scenario A L (d) Recall that, O 2 H 3 2.05 2.10 2.15 2.20 2.25 2.30 2.35 (ii) Ho: M₁ M₂ = μ3 sans are (iv) HA: not all means are equal 720 qeaoluet alt sot mol 4 mobor 2924 (6) 2 3 4 gob za aim onbala (1) di batt (9) w-qodt fonqtotal bac o2 (6) (Troy ote12. (0) (a) Which scenario provides stronger evidence that the difference in factor level means represents true differences in the population means? Explain why in your own words. Scenario B 1 = stogol 05 O 1 oftaltete fest out of sulav gris I (b) Which scenario exhibits more variability within each factor level? Is this measured by SSError or SSFactor? Agulow (c) Which scenario exhibits more variability between each factor level? Is this measured by…
Past research has indicated that the average age of death row inmates is 41 years old. researcher would like to determine if the average age has changed. She randomly selects 50 death row inma s and ds their average age to be 37 years old. The hypothesis the statistician wants to test is: a. Ho: µ=37 vs_ Ha: µ ± 41. b. Ho: µ=41 vs Ha: µ< 41. Ho: u = 41 vs. H: u 41 d. Ho: µ=37 vs_Ha: µ< 41. C. 2. If a player at a casino is playing roulette and betting on red, there is a 18 / 38 or 0.474 chance that he will win on any spin of the roulette wheel. If we take a random sample of 300 players betting on red, then p is the proportion of times that the player wins. What is the mean of the sampling distribution of p? t' a. b. What is the standard deviation (os) of the sampling distribution of p? c. If repeated samples of 300 players are taken, what would be the range of the sample proportion of players victories according to the 95 part of the 68-95-99.7 rule" pts) 3. The z statistic for a…
Answer the following True or False: If a researcher wants to test the claim that more than 25% of all students purchased their textbook online, then the null and alternative hypotheses are Ho: u = 0.25 and Ha: u >'0.25. true O false
Given the following information: P(A) = 0.4, P(B) = 0.3, P(C)= 0.5, P(AOB)= 0.12, P(BOC)= 0.13, P(AnC) = 0.11, P(A^BoC)=0.05. The value of P((Bn©)|Ā) is 20 13 15 41 49 41 60
11. A hypothesis test is conducted with H0 : µ = 46 vs. Ha: µ ≠ 46. The hypothesis test sample finds x̅ = 47.2, s = 5, and n = 81. The tail area in this test is P =
50% of students entering four-year colleges receive a degree within six years. Is this percent different from for students who play intramural sports? 117 of the 239 students who played intramural sports received a degree within six years. What can be concluded at the level of significance of αα = 0.05? The null and alternative hypotheses would be: Ho: ? μ p Correct Select an answer = < ≠ > Correct (please enter a decimal) H1: ? p μ Correct Select an answer < ≠ = > Correct (Please enter a decimal) The test statistic ? z t Correct = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)
Answers: 1. a) χ2 = 4.112, do not reject H0: gender and age of contracting the disease are independent; b) χ2 = 14.03, reject H0: the data do not support the researcher's beliefs; Answer back quickly plz c) χ2 = 2.068, do not reject H0: it appears that this belief is not supported (there is no evidence to suggest that the belief is correct).
Question 10
If a treatment is expected to decrease scores in a population with µ= 30, then the alternative hypothesis is µ ≤ 30. True or false?
For each situation, state the null and alternative hypotheses: (Type "mu" for the symbol μμ , e.g. mu >> 1 for the mean is greater than 1, mu << 1 for the mean is less than 1, mu not = 1 for the mean is not equal to 1. Please do not include units such as "mm" or "$" in your answer.) (a) The diameter of a spindle in a small motor is supposed to be 5.2 millimeters (mm) with a standard deviation of 0.15 mm. If the spindle is either too small or too large, the motor will not work properly. The manufacturer measures the diameter in a sample of 13 spindles to determine whether the mean diameter has moved away from the required measurement. Suppose the sample has an average diameter of 5.34 mm.H0 : Ha : (b) Harry thinks that prices in Caldwell are lower than the rest of the country. He reads that the nationwide average price of a certain brand of laundry detergent is $17.55 with standard deviation $0.72. He takes a sample from 4 local Caldwell stores and finds the average…

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(a). The null and alternative hypotheses are Но: 3D 21.7 Ha:µ > 21.7 Ho:µ = 20.3 Но: %| На: д < 20.3 Ο H0: μ =21.7 Ha:µ < 21.7 Ho :ã = 20.3 Ha:ã < 20.3