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Construct a histogram to represent these data. What do you see in the graph that might be helpful to the production (and sales) people?
what are the mean and standard deviation for the population of products produced with this process?
Consider the following samping scheme. Find the probability of selection pi for each unit i and what is the sampling distribution of t hat = 8*ybar.
Compute the mean, variance, and standard deviation for the population. What percentage of these provinces has average per capita energy consumption within +/- 1, +/- 2 and +/- 3standard deviation of
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y:
Find the value of the test statistic z using z = ^p-P ^pq/n. The claim is that the proportion of drowning deaths of children attributable to beaches is more than 0.25, and the sample statistics incl
While it will result in a weaker comparison, you determine that you are still able to compare pre-test vs. post-test scores; you will use a between-subjects design rather than a within-subjects desi
A Tamiami shearing machine is producing 10 percent defective pieces, which is abnormally high. The quality control engineer has been checking the output by almost continuous sampling since the abnor
ledolter and hogg report that two different fabrics say x and y are compared on a martindate were tester that can compare two materials in a sigle run, the weights losses from seven runs are as foll
Suppose you randomly choose a sample of 30 observations from a normal distribution. You then use those observations to estimate the mean of the population.
The circumferences of battery posts in a nickel-cadmium battery are Weibull distributed with location parameter v = 3.25 centimeters, shape parameter β=1/3, and scale parameter α=0.005 ce
A standard deviation of 10 work-days. To be 99% sure that we will not be late in completing the project, what is the requested completion time in work-days?
what is the approximate probability that in a random sample of 1000 individuals who have purchased fries at McDonald's,
Suppose 40% of a student population possess works part-time. If a random sample of size 300 is drawn from the population, what is the probability that 44% or fewer of the samples works part-time?
The weight of a .5 cubic yard bag of landscape mulch is normally distributed with a mean of 40 pounds and a standard deviation of 1. What is the probability that a bag will weigh more than 40 pounds
What is the probability that a ramdomly selected bulb would last few than 1100 hours? Would you show me step by step on how to figure out the answer?
What decision should be made based on the minimax regret criterion?
Compare the mean for the heights of males and the mean of the heights of females in the following data. Compare the values and explain what can be concluded based on the numbers.
you want to estimate the proportion of customers who are satisfied with their supermarket ay level of confidence of .92 and within .025 of the true value. How large of a sample is needed?
A certain population has a mean of 479 and a standard deviation of 33. Many samples of size 42 are randomly selected. What value would you expect to find for the mean of all these sample means?
If a study had a result of F(2, 147)=4.56, p=0.003, how many groups were in the study, and what was the sample size?
The concentration of a solution is measured six times by one operator using the same instrument. She obtains the following data: 63.2, 67.1, 65.8, 64.0, 65.1, and 65.3 (grams per liter).
If a random sample of 31 is taken, what is the probability that the sample of kindergarten children has a mean height of less than 39.8 inches?
A population of N = 6 scores has SX = 12 and SX2 = 54. What is the value of SS for this population?
Construct a 99% confidence interval estimate of the population mean difference between the actual length of the steel part and the specified length of the steel part?