Answered: The hospital records show that 75% of…

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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The expected life of a certain component in a mechanism is treated as a random variable having a gamma distribution with a = 3 and ß = 2. The average expected life of such component is 12 months, what is the probability that this component can have a greater than average expected life?
Each year, more than 2 million people in the United States become infected with bacteria that are resistant to antibiotics. In particular, the Centers of Disease Control and Prevention have launched studies of drug-resistant gonorrhea.† Suppose that, of 189 cases tested in a certain state, 12 were found to be drug-resistant. Suppose also that, of 429 cases tested in another state, 8 were found to be drug-resistant. Do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance. (Let p1 = the population proportion of drug-resistant cases in the first state, and let p2 = the population proportion of drug resistant cases in the second state.) State the null and alternative hypotheses. (Enter != for ≠ as needed.) H0: ______ Ha: ______ Find the value of the test statistic. (Round your answer to two decimal places.) = What is the p-value? (Round your answer to four decimal places.) p-value =…
When the Titanic sank, passenger survival rates were recorded along with additional information like their name, what class ticket they had, their age, and whether or not they had children. Some of these factors may predict whether or not a passenger was likely to survive the accident. The data set "Titanic survival.jasp" contains actual recorded data from the event. Using the variables "Class" and "Survived", conduct a Chi-Square Test for Independence, at alpha = 0.05, to see if a passengers ticket class (first, second, or third class) is significantly associated with their survival rates. Identify the correct value for df. A. 2 B. 1309 C. 4 D. 127
In a genetics experiment on peas, one sample of offspring contained 433 green peas and 121 yellow peas. Based on those results, estimate the probability of getting an offspring pea that is green. Is the result reasonably close to the value of 3/4 that was expected?
To find out whether a new serum will arrest leukemia, 9 mice, all with an advanced stage of the disease are selected. Five mice receive the treatment and 4 do not. Survival times. In years, from the time the experiment commenced are as follows: Treatment 2.1//5.3/1.4/14.6/7 0.9 No Treatment 1.9// 0.5/7 2.8/7 3.1 At the 0.05 level of significance, determine t table. Blank 1 Determine the pooled standard deviation in two decimal places. Blank 2 Determine the t calculated in two decimal places. Blank 3 can the serum be said to be effective? yes or no. Blank 4 Assume the two populations to be normally distributed with equal variances. Blank 1 Add your answer Blank 2 Blank 3 Blank 4 Add your answer Add your answer Add your answer
In a quick audit of the tiered deployment of the Covid-19 vaccines in the state of California, the probability that a person has received a vaccine shot given that the person is elderly is 70 percent, whereas the probability that a person has received a vaccine shot given that the person is not elderly is 2 percent.? The proportion of Californians who are elderly is 0.111. Compute the probability that a person is elderly given that the person has received a vaccine shot.
It is known that roughly 2/3 of all human beings have a dominant right foot or eye. Is there also right-sided dominance in kissing behavior? An article reported that in a random sample of 112 kissing couples, both people in 69 of the couples tended to lean more to the right than to the left. (Use α = 0.05.) USE SALT (a) If 2/3 of all kissing couples exhibit this right-leaning behavior, what is the probability that the number in a sample of 112 who do so differs from the expected value by at least as much as what was actually observed? (Round your answer to four decimal places.) (b) Does the result of the experiment suggest that the 2/3 figure is implausible for kissing behavior? State the appropriate null and alternative hypotheses. Ho: P = 2/3 H₂: P ≤ 2/3 Ho: P = 2/3 H₂: P > 2/3 O Ho: P = 2/3 H₂: P < 2/3 ⒸH₁: P = 2/3 H₂:P # 2/3 Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) P-value =
Hutchinson-Gilford progeria syndrome is a rare genetic condition that produces rapid aging in children. In individuals with this syndrome, cardiovascular disease is a common cause of death in the teenage years. A clinical study examined the effect of treatment with the drug lonafarnib on a number of physiological outcomes. The researchers measured the pulse wave velocity (PWV) of 18 children diagnosed with progeria and recruited worldwide. The study reports that the mean PWV of 18 children diagnosed with progeria is 12.44 m/s, and the standard deviation is 3.638 m/s. Assuming that PWV is normally distributed, is there significant evidence that the mean PWV of children with progeria is abnormally high (i.e. greater than 6.6 m/s)? Let � (pronounced as "mu") be the true mean PWV of children with progeria. What are the two competing hypotheses? ["", "", "", ""] What is the test statistic? ["", "", "", ""] What is the p value? ["", "", "", ""] What is the rejection…
It is known that 98% of mice inoculated with a serum are protected from a certain disease. Suppose a shipment of 100 mice arrived in a laboratory. If these mice were supposed to have been inoculated, what is the expected number of mice that will contract the disease? Suppose that 35 of these mice contracted the disease, approximate the chance of this happening if it is true that the mice have already been inoculated. Assume independence.

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The hospital records show that 75% of patients suffered from COVID-19 dies. What is the probability that 4 out of 6 randomly selected patients will recover?