Suppose, X-Binom(m.0) and 8- Beta (a, B), then E(X) is equals to, b) d) maß aß ma α+ B me Answer B € D
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- If a 95% CI for mu is (1.05, 3.95) when sigma is known a Ztest at alpha=0.05 with a Null hypothesis: mu=1 would reject the Alternative hypothesis True or FalseA research center claims that that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 1200 adults in that country, 33% say that would travel into space on a commercial flight if they could afford it. At alpa= 0.05, isthere enough evidence to reject the research centers claim complete parts a through d belowIn a clinical study, a random sample of 540 participants agree to have their blood drawn, which is to be examined for the presence of antibodies against a certain contagious disease. It is found in 22% of the blood samples, which experimenters hope to extrapolate to the general population. From this random sample, 10 participants' blood samples are selected at random. If X is the number of samples out of the 10 who have these antibodies, what can we say about X? A. The sample size is not large enough for us to approximate X using a normal distribution B.The expected value of X is 22 C. X can be approximated using a normal distribution in lieu of a binomial distribution D. X has a sampling distribution that is normal
- If the p value is > alpha , what does this mean ? - it proves the Ho is true , with beta error possible - it proves the Ha is true , with alpha error possible - there is sufficient evidence to conclude Ha May be true , with alpha error possible - there is sufficient evidence to conclude that Ho May be true , with beta error possibleA research center claims that at least 22 % of adults in a certain country think that their taxes will be audited. In a random sample of 1000 adults in that country in a recent year, 19 % say they are concerned that their taxes will be audited. At alpha equals0.10 , is there enough evidence to reject the center's claim? Complete parts (a) through (e) below.If X1, X2, ... , Xn constitute a random sample of size n from an exponential population, show that X is a consis-tent estimator of the parameter θ.
- A certain company produces fidget spinners with ball bearings made of either plastic or metal. Under standard testing conditions, fidget spinners from this company with plastic bearings spin for an average of 2.7 minutes, while those from this company with metal bearings spin for an average of 4.2 minutes. A random sample of three fidget spinners with plastic bearings is selected from company stock, and each is spun one time under the same standard conditions; let x¯1x¯1 represent the average spinning time for these three spinners. A random sample of seven fidget spinners with metal bearings is selected from company stock, and each is likewise spun one time under standard conditions; let x¯2x¯2 represent the average spinning time for these seven spinners. What is the mean μ(x¯1−x¯2)μ(x¯1−x¯2) of the sampling distribution of the difference in sample means x¯1−x¯2x¯1−x¯2 ? 3(2.7)−7(4.2)=−21.33(2.7)−7(4.2)=−21.3 A 3−7=−43−7=−4 B 2.7−4.2=−1.52.7−4.2=−1.5 C…A commonly cited study says that 49% of students study less than 5 hours per week. A researcher does not think this is accurate and wants to show that the percentage of students that study less than 5 hours per week is not equal to 49%. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter p.If X1, X2, ... , Xn constitute a random sample of size nfrom a geometric population, show that Y = X1 + X2 +···+ Xn is a sufficient estimator of the parameter θ.
- A study reported on the results of an experiment designed to compare treating cancer patients with chemotherapy only to treatment with a combination of chemotherapy and radiation. Of the 154 individuals who received chemotherapy only treatment, 75 survived for at least 15 years, whereas 97 of the 162 patients who received the hybrid treatment survived at least that long. Using frequentist approach, which of the two approach is more effective for the alpha = 0.05. Key in the p-value of the that is higher than the other. include the conclusion in the paper.In a clinical trial, 2828 out of 887887 patients taking a prescription drug daily complained of flulike symptoms. Suppose that it is known that 2.62.6% of patients taking competing drugs complain of flulike symptoms. Is there sufficient evidence to conclude that more than 2.62.6% of this drug's users experience flulike symptoms as a side effect at the alpha equals 0.05α=0.05 level of significance?Because np 0 left parenthesis 1 minus p 0 right parenthesisnp01−p0equals= nothing▼ 10, the sample size is ▼less thanless than greater thangreater than 5% of the population size, and the sample ▼can be reasonably assumed to be random, is given to be random, is given to not be random, cannot be reasonably assumed to be random, the requirements for testing the hypothesis ▼are not are satisfied.(Round to one decimal place as needed.)Enter your answer in the answer box and then click Check Answer.In a toy shop ,2% of the toys are defective.If a boy selects 4 toys randomly ,find the probabiility of getting atleast one of the toys defective .
