marginal distributions of X and Y.
Q: Suppose that a variable of a population has a reverse-J-shaped distribution and that two simple…
A: Given variable of a population has a reverse J- shaped distribution. Any sample distribution will be…
Q: ume that x has a normal distribution with a-26%. A random sample of 17 Australian bank has a sample…
A: The question is about hypothesis testingGiven :Population mean dividend yield ( ) = 6.5 %…
Q: What is the standard deviation of the time spent with a patient? What is the likelihood that the…
A: The standard deviation of the time spent with a patient can be calculated as: Thus, the standard…
Q: If the range of X is the set {0,1,2,3,4} and given that each outcomes are equally like to occur,…
A:
Q: Weights of watsathingies are normally distributed with mean u 14 kg and variance o² = 4. Find the…
A: From the given information, Consider, X be the random variable that the denotes weight…
Q: = Two random variables X, Y have variances Var(X) = 2 and Var(Y): = 8. respectively. If the…
A: The values of Var(X) is 2, Var(Y) is 8 and ρxy is 1/3.
Q: Q5. Talk times of cellphones are described by the normal distribution with mean time 24 hours and…
A: X= Talk time on cell phone.Population mean :μ=24hoursStandard deviation :σ2=2σ=2Here we need, P (…
Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…
A:
Q: Emissions of nitrogen oxides, which are major constituents of smog, can be modeled using a normal…
A:
Q: Suppose a professor uses a normal distribution to assign grades in her math class. • She assigns an…
A: Given: z score Grade >2.2 A <-2 F 0.9 < z<2 B -1 < z< -0.8 D
Q: Suppose that the random variable X has a normal distribution with mean 0 and variance 800. What is…
A: given the random variable X follows normal distribution mean(μ) =0variance =800we know the formula…
Q: A sample of final exam scores is normally distributed with a mean equal to 20 and a variance equal…
A:
Q: Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…
A: Answer Given The population mean= 4.78This is left-tailed test.
Q: Carboxyhemoglobin is formed when hemoglobin is exposed to carbon monoxide. Heavy smokers tend to…
A: Part a: From the given data we have: S.No. X x-xbar 1 9.1 2.1025 2 9.8 0.5625 3 10.6…
Q: A researcher wants to know if there is a difference between the mean amount of sleep that people get…
A: The following table regarding mean amount of sleep is given. Unemployed Part Time Worker Full…
Q: Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic…
A: (i) Use TI-83 plus Calculator to obtain the values of sample mean and the standard deviation.…
Q: The number of traffic accidents on a section of the M4 freeway during peak flow periods follows a…
A: The provided information is as follows:The number of traffic accidents on a section of the M4…
Q: (a) 60% of the distribution below it, (b) 75% of the distribution below it, (c) 80% of the…
A: standard normal distribution Z~N(0,1) we have to find value of z such that (a) 60% of the…
Q: A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of…
A:
Q: Of all customers purchasing automatic garage-door openers, 57% purchase a chain-driven model. Let X…
A:
Q: Suppose we take a sample of size 30 from a geometrical distribution 200 times. Draw a graph of the…
A: Given that a sample of size 30 is taken from a geometrical distribution 200 times.
Q: Let x be a random variable representing dividend yield of Australian bank stocks. We may assume that…
A:
The joint distribution of two random variables X and Y is tabulated below. Complete the table by completing the marginal distributions of X and Y.
Step by step
Solved in 2 steps with 2 images
- Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic millimeter of whole blood. Then x has a distribution that is approximately normal. For the population of healthy female adults, suppose the mean of the x distribution is about 4.78. Suppose that a female patient has taken six laboratory blood tests over the past several months and that the RBC count data sent to the patient's doctor are as follows. 4.9 4.2 4.5 4.1 4.4 4.3 (i) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.) x = s = (ii) Do the given data indicate that the population mean RBC count for this patient is lower than 4.78? Use ? = 0.05. (a) What is the level of significance?State the null and alternate hypotheses. H0: ? < 4.78; H1: ? = 4.78H0: ? = 4.78; H1: ? ≠ 4.78 H0: ? = 4.78; H1: ? < 4.78H0: ? = 4.78; H1: ? > 4.78H0: ? > 4.78; H1: ? = 4.78 (b) What sampling…A researcher wants to know if there is a difference between the mean amount of sleep that people get for various types of employment status. The table below shows data that was collected from a survey. Full Time Worker Part Time Worker Unemployed 6 6 7 5 6 7 8 9 9 7 6 8 8 8 8 8 8 8 6 6 8 8 7 6 9 Assume that all distributions are normal, the three population standard deviations are all the same, and the data was collected independently and randomly. Use a level of significance of α=0.01α=0.01.H0: μ1=μ2=μ3H0: μ1=μ2=μ3H1:H1: At least two of the means differ from each other. For this study, we should use Select an answer 2-PropZTest 2-PropZInt 1-PropZInt 2-SampTInt 1-PropZTest T-Test χ²-Test ANOVA χ²GOF-Test TInterval 2-SampTTest The test-statistic for this data = (Please show your answer to 3 decimal places.) The p-value for this sample = (Please show your answer to 4 decimal places.) The p-value is Select an answer less than (or equal to) alpha greater…What position in the distribution corresponds to a z-score of z = +2.00?
- Service time for a customer coming through a checkout counter in a retail store is a random variable with the mean of 4.0 minutes and standard deviation of 2.0 minutes. Suppose that the distribution of service time is fairly close to a normal distribution. Suppose there are two counters in a store, n₁ = 46 customers in the first line and n₂ = 52 customers in the second line. Find the probability that the difference between the mean service time for the shorter line X₁ and the mean service time for the longer one X₂ is more than 0.3 minutes. Assume that the service times for each customer can be regarded as independent random variables. Round your answer to two decimal places (e.g. 98.76). P = !Let x be a random variable that represents red blood cell count (RBC) in millions of cells per cubic millimeter of whole blood. Then x has a distribution that is approximately normal. For the population of healthy female adults, suppose the mean of the x distribution is about 4.64. Suppose that a female patient has taken six laboratory blood tests over the past several months and that the RBC count data sent to the patient's doctor are as follows. 4.9 4.2 4.5 4.1 4.4 4.3 (1) Use a calculator with sample mean and standard deviation keys to find x and s. (Round your answers to two decimal places.) x=| S= (ii) Do the given data indicate that the population mean RBC count for this patient is lower than 4.64? Use a = 0.05. (a) What is the level of significance? State the null and alternate hypotheses. Ο Hg: μ= 4.64; H1: μ 4.64 Ο Ηρ: μ> 4.64; H1: μ = 4.64 Ho: u = 4.64; H1: u * 4.64 (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. O…Suppose that the probability that a patient admitted in a hospital is diagnosedwith a certain type of cancer is 0.03. Suppose that on a given day 10 patients areadmitted and X denotes the number of patients diagnosed with this type of cancer.Determine the probability distribution of the random variable X. Find the meanand the variance of X