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Testing the null hypothesis using a single-sample test

A cereal company claims that the average weight of its cereal packages is 14 ounces. Eight packages are tested and the weights given below are measured. Test the claim at α=.0.01 14.6, 13.8, 14.1, 13.7, 14.0, 14.4, 13.6, 14.2

Subject:

Statistics

Topic:

All Topics

Posting ID:

3255

OTA ID:

101202

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Determining the percentage from a sample using margin of error and a confidence level.

A survey of shoppers is planned to determine what percentage use credit cards. The required margin of error is 0.02 at 95% confidence. What is the minimum sample size required to assure that your sample proportion "p" will be within the required margin of error around the population "p".

Subject:

Statistics

Topic:

All Topics

Posting ID:

3272

OTA ID:

103058

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Testing the claim.

A company claims that the weight of the cereal in one of its packages is at least 14 oz. Eight packages are tested and the weights given below are measured. Test the claim at a = 0.01. 14.6, 13.8, 14.1, 13.7, 14.0, 14.4, 13.6, 14.2

Subject:

Statistics

Topic:

All Topics

Posting ID:

3309

OTA ID:

103058

View Details $1.99 Download Add to Cart

Finding Minimum Sample Size

A survey of shoppers is planned to determine what percentage use credit cards. Prior surveys suggest that 59% use credit cards. The required margin of error is 0.02 at 95% confidence. What is the minimum sample size required to assure that your sample proportion "p" will be within the required margin of error, around the population proportion "p". What I got for the answer was: p = x/n = 59/100 = .59 q = 1-p = .41 E (margin of error) = .02 a = .05 n = [ (z .025)squared X (.59) (.41) ] / E squared = 1.96 squared X (.59) (.41) / .02 squared = 2323.2076 (minimum sample size required. However, prior comments I have seen on this problem use 1.645 for the z value, when a = .05, ... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

3326

OTA ID:

101327

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Understanding how to calculate statistical significance.

How do I calculate statistical significance. I conducted an observation in a classroom (1/2 per day (specific time), 5 consecutive days, 12 students in class) to determine the number of times a specific target behaviour occurred (frequency count). The following week I observed one specific student in the class (1/2 hour per day (specific time), 5 days) to obtain a frequency count of his/her target behavior. How do I determine if the individual students behavior is one or more standard deviations above the classroom mean for the target behavior. Classroom: Frequency Count Day: Total Occurrences 1) 2 2) ... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

3364

OTA ID:

103139

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