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Probability

A sample of four different tires is randomly selected from a lot containing 44 that are defective. What is the probability that all four of the tires selected are defective?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2138

OTA ID:

102799

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Probability Estimation

Of 1037 people who came in to a blood bank to give blood, 330 of them had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure.

Subject:

Statistics

Topic:

All Topics

Posting ID:

2139

OTA ID:

102827

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Solving a Particular Research Question

1). I am conducting research on microscopic toolmark analysis. If I have a toolmark with 27 striations (lines) of varying spatial relationships (orientations), widths and densities, do I use the combination formula to determine the probablity that another toolmark will by chance have a group of at least eight consecutively matching striations: that is the striae have the same spatial relationship, the same density(shades of gray), and the same width. I have done this calculation with the combination formula to determine the probability of having 8 striae out of 27 from one toolmark matching another set of 8 striae out of 27 in a second toolmark in spatial relationship only. My answer was 1/2... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

2159

OTA ID:

102827

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Determining probability using mean and standard deviation.

A food processing company packages a product that is periodically inspected by the Food and Drug Administration. The FDA has ruled that the company's product may have no more than 2.00 grams of a certain toxic substance in it. Past records of the company show that packages of this product have a mean weight of toxic substance equal to 1.25 grams per package and that the weights are normally distributed around 1.25 grams with a standard deviation of 0.25 gram. What proportion of the individual packages exceed the FDA limit? A team of FDA inspectors is on its way to inspect a random sample of the company's output. The inspectors plan to take preliminary sample of 25 packages. If they f... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

2193

OTA ID:

101438

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Determining a relationship between variables and the correlation coefficient.

A real estate broker hoped to develop an equation that could be used to predict the sales price of homes in a certain suburb. It seemed to him that the most important variables, since all the homes were in pretty much the same locale, were age of house, square feet, and number of bedrooms. _ _ X=7.1 Y=90.7 x=0.4 y=-0.2 Sigma x^2=87.76 Sigma y^2=2481.44 Sigma xy=408.62 Determine the relationship between sales price and age of house and determine the correlation coefficient. Is the age of the house significant factor at alpha=0.05 in determining sales price? Explain What does the fact that the correlation is less than 100% suggest?

Subject:

Statistics

Topic:

All Topics

Posting ID:

2194

OTA ID:

102696

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