Let Y₁, Y₂, Y3, Y₁, Ys be a random sample of size 5 from a standard normal population. Find the moment generating function of the statistic: X=2Y₁² +Y₂² + 3Y3² +Y₂² +4Y5²
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Given Y1,Y2,Y3,Y4, Y5 is a random sample of size 5 from a standard normal population. Here we should find the Moment generating function of the statistic that is the MGF of X.
Please find the explanation below. Thank you.
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- The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9060 observations, the sample mean interval was x1 = 62.4 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 24,755 observations, the sample mean time interval was x2 = 70.8 minutes. Historical data suggest that σ1 = 8.07 minutes and σ2 = 12.20 minutes. Let μ1 be the population mean of x1 and let μ2 be the population mean of x2. (a) Compute a 99% confidence interval for μ1 – μ2. (Use 2 decimal places.) lower limit upper limitLet X be the random variable representing the systolic bloodpressure (mmHG) in healthy adults. It is known that X ∼ N(112, 100).Compute a threshold for the highest 6% of blood pressures.The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9060 observations, the sample mean interval was x1 = 62.4 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 24,638 observations, the sample mean time interval was x2 = 70.8 minutes. Historical data suggest that σ1 = 8.07 minutes and σ2 = 11.57 minutes. Let μ1 be the population mean of x1 and let μ2 be the population mean of x2. (a) Compute a 90% confidence interval for μ1 – μ2. (Use 2 decimal places.) lower limit upper limit
- The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9240 observations, the sample mean interval was x1 = 63.6 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 24,170 observations, the sample mean time interval was x2 = 69.2 minutes. Historical data suggest that σ1 = 8.00 minutes and σ2 = 12.62 minutes. Let μ1 be the population mean of x1 and let μ2 be the population mean of x2. (a) Compute a 99% confidence interval for μ1 – μ2. (Use 2 decimal places.) lower limit upper limitLet X1 and X2 are each independent Bernoulli random variable with probability of success p=0.2 and Y= X1 -3 X22. Compute the expected value of Y. Let X1 and X2 are each independent Exponential random variable with mean 5 and Y= X1 -3 X2 then Compute the value of variance of Y. Let X has Poisson distribution with mean 10. Compute correlation between X and -Let n be a random sample from the exp(0) Show that X is a sufficient statistic for
- The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x1 be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9180 observations, the sample mean interval was x1 = 62.6 minutes. Let x2 be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 24,872 observations, the sample mean time interval was x2 = 70.0 minutes. Historical data suggest that σ1 = 8.91 minutes and σ2 = 11.78 minutes. Let μ1 be the population mean of x1 and let μ2 be the population mean of x2. (a) Compute a 95% confidence interval for μ1 – μ2. (Use 2 decimal places.) lower limit upper limit (b) Comment on the meaning of the confidence interval in the context of this problem. Does the interval consist of positive numbers only? negative numbers only? a mix of positive and…Let X1, X2,..., Xn be a random sample of size n > 3 from a normal distribution with unknown mean μ and known variance equal to 2. Show that is an unbiased estimator of μ and compute its variance. pThe table below shows the number of hours per day 11 patients suffered from headaches before and after 7 weeks of soft tissue therapy. At x = 0.01, is there enough evidence to conclude that soft tissue therapy helps to reduce the length of time patients suffer from headaches? Assume the samples are random and dependent, and the population is normally distributed. Complete parts (a) through (f). Patient 8 9 10 11 Q 1 Daily headache hours (before) 2.3 3.4 3.3 2.6 1.8 Daily headache hours (after) 1.8 2.7 1.8 1.6 1.9 1.9 1.2 2.5 2.2 2.0 1.1 2 3 4 5 6 7 4.1 3.2 3.5 2.4 3.7 2.6 C (a) Identify the claim and state Ho and Ha The claim is "The therapy the length of time patients suffer from headaches." Let μd be the hypothesized mean of the patients' daily headache hours before therapy minus their daily headache hours after it. State Ho and H₂. Choose the correct answer below. OA. Ho: Hd=d O C. Ho: Hd ≤0 OB. Ho. Họ sở Ha: Hd >d Ha: Hdd Ha: Hd>0 OD. Ho: Hd #d Ha:Hd=d O E. Ho: Hd zd Ha: Hd 3.169…