Find the mean E(x) using the following the pmf p(X=x)=(12/(4^x)), x=2,3,4,5,6,....infinity
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Find the mean E(x) using the following the pmf
p(X=x)=(12/(4^x)), x=2,3,4,5,6,....infinity
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- A random sample of 25 tires gave the average life as 38000 km and S.D. as 5000 km. Can it be concluded that the sample is drawn from a population with a mean life of 40000 km?The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the production lot every week. The records show that, when there is no malfunction, the defect rate in the manufacturing process (due to imperfections in the material used) is 1% . When 1.25% or more of the light bulbs in the sample of 4400 are defective, the control unit calls repair technicians for service. Answer the following. (If necessary, consult a list of formulas.) (a)Find the mean of p, where pis the proportion of defective light bulbs in a sample of 4400when there is no malfunction. (b)Find the standard deviation of p . (c)Compute an approximation for P≥p0.0125 , which is the probability that the service technicians will be called even though the system is functioning properly. Round your answer to four decimal places.Solve its from frequency distribution
- Please show how to do this using PH STAT, not sure how to set up dummy variables. ThxThe control department of a light bulb manufacturer randomly picks 4400 light bulbs from the production lot every week. The records show that, when there is no malfunction, the defect rate in the manufacturing process (due to imperfections in the material used) is 1%. When 1.25% or more of the light bulbs in the sample of 4400 are defective, the control unit calls repair technicians for service. Answer the following. (If necessary, consult a list of formulas.) (a)Find the mean of p, where p is the proportion of defective light bulbs in a sample of 4400 when there is no malfunction. (b)Find the standard deviation of p. (c)Compute an approximation for P≥p0.0125, which is the probability that the service technicians will be called even though the system is functioning properly. Round your answer to four decimal places.The variation of Y around its mean can be decomposed into which two parts?
- Find the linear correlation coefficient for stride length versus speed of an adult man inTable 12.8a. Round your result to the nearest hundredth.Suppose body temperature is normally distributed with mean of 98.30°F and a standard deviation of 0.76°F. Using these parameters, how often would you expect to measure a body temperature above 100°F?For SRSWOR (N,n), find the ratio estimator of population mean. Show that the estimator is biased.
- Assuming that mean annual temperature uniformly distributed between 100C and 180C, calculate the average annual mean temperature.Suppose we observe 30 cases of colon cancer over 35,000 person-years among women ages 50–54. Provide a point estimate and 95% CI for the incidence rate of colon cancer in this age-gender groupsuppose that the mean time for a certain car to go from 0 to 60 miles per hour was 8.6 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer than 8.6 secons. What would you use for the alternative hypothesis?