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The height of the water level in mineral water bottles has a mean of 140 mm and a standard deviation of 4 mm. Assume that the height of the water level is normally distributed and water levels in di
Suppose X,Y,and C represent the length, width, and perimeter of a flat rectangular sheet metal part. Note that Xis a normal random variable having a mean of 15 cm and a standard deviation of 1 cm, a
A sample of 21 of 180 funded projects revealed that 19 were valued at $17,680 each and 2 were valued at $20,320 each. From the sample data, estimate the total value of the funding for all the projec
Find z. (Give your answer correct to two decimal places.) Find the p-value. (Give your answer correct to four decimal places.)
A certain office building infrequently experiences power outages. It is known that the probability of a power outage on any given day is 0.005, and power outages are independent of each other.
A seed company advertises that the mean time for planting to harvest for a new variety of zucchini seeds is 45 days. The standard deviation is estimated to be 10.3 day.
A web based software company is interested in estimating the proportion of individuals who use the Firefox browser. In a sample of 200 of individuals, 37 users stated that they used Firefox. Using t
A university with a high water bill is interested in estimating the mean amount of time that students spend in the shower each day. In a sample of 19 students, the average time was 5.09 minutes and
A sanitation department is interested in estimating the mean amount of garbage per bin for all bins in the city. In a random sample of 40 bins, the sample mean amount was 51.4 pounds and the sample
A drug company is studying two drugs, A and B, which are used to dilate the pupils of human eyes during examination. Nine persons were chosen and drug A was randomly applied to one eyes, and drug B
A random variable x has the following probability distrubution.
Estimate the mean and standard deviation of this process. Suppose that parts below the LSL can be reworked, but parts above the USL must be scrapped. Estimate the proportion of scrap and rework prod
You are visiting Las Vegas and would like to come home with more money than you arrived with. Use your knowledge of probability to answer the following questions: (Show all work, not just answers)
Perform the appropriate post hoc comparisons. What do you conclude about this relationship? What is the effect size in this study,
Derive the probability distribution for total losses under Option A. Once again remember that if a fire occurs, the loss will be $1,000.
To use instruments in a shared research lab you first have to ask the lab monitor. She will then walk into the lab to see if the instrument you want to use is available, and if it is, you get to use
In a survey of women in a certain country (ages 20-29), the mean height was 64.5 inches with a standard deviation of 2.91 inches answer the following question about the specified normal distribution
Compute the probability of selling less than 6 properties in one week.
A study of fill volumes is conducted at a food canning factory to determine the level of consistency between the two filling lines, A and B. A random sample of 11 cans taken from line A has a sampl
Create a drawing or plan for a 2 × 3 experimental design that would lend itself to a factorial ANOVA. Identify the independent and dependent variables
Using the Wilcoxon Rank Sum Test, analyze the following data for evidence that population B is different from population A.
An industrial psychologist wishes to study the effect of motivation on sales in a particular firm. 24 new salespersons are randomly divided into two groups of 12. One group is paid an hourly rate an
Do this exercise by hand. A famous brand-name manufacturer wants to know whether people prefer Nibbles or Wribbles. They sample each type of cracker and indicate their like or dislike on a scale fro
If the fracture strength measurements of glass have a standard deviation of 0.4 thousands of pounds per square inch, how many glass fracture strength measurements should be taken if the sample mean
Use this information to determine the minimum sample size that could be used in next year's survey to estimate the mean salary of IMA members to within $2000 with 98% confidence.