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Testing the claim.

A random sample of 15 women yielded a mean pulse rate of 74.5 beats/minute with a standard deviation of 9.6. A random sample of 12 men yielded a mean pulse rate of 76.0 beats/minute with a standard deviation of 8.7. Test the claim that pulse rates for men and women are the same. Use V = 0.01. Use the traditional methods for testing hypotheses and show the results of all steps in the process.

Subject:

Statistics

Topic:

All Topics

Posting ID:

3129

OTA ID:

102454

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Determining the minimum sample size using a confidence level and a margin of error.

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". Use the traditional methods for testing hypotheses and show the results of all steps in the process.

Subject:

Statistics

Topic:

All Topics

Posting ID:

3130

OTA ID:

103058

View Details $1.99 Download Add to Cart

TEST THE CLAIM

A random sample of 15 women yielded a mean pulse rate of 74.5 beats per minute, with a standard deviation of 9.6. A random sample of 12 men yielded a mean pulse rate of 76.0 beats per minute, with a standard deviation of 8.7. Test the claim that pulse rates for men and women are the same. Use a=.01. I came up with C.R, values of z < -3.106 and z > 3.106, by using -t 11, .005 and +t 11, .005. I came up with a t value of -.5973, and P-Value of .5406 My null hypothesis is M=74.5 and alternative is M (does NOT equal) 74.5 I ended up rejecting the Null Hypothesis and concluded that the pulse rates are not the same for men and women. Am I doing this right?

Subject:

Statistics

Topic:

All Topics

Posting ID:

3239

OTA ID:

101202

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A cereal company claims that the weight of the cereal in one of the packages is at least 14 ounces.

A cereal company claims that the weight of the cereal in one of the packages is at least 14 ounces. 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 I have my null hypothesis as M (greater than or equal to) 14.0, and alternative hypothesis as M < 14.0 a=0.01 z = z > z.01 = .5000 - .0100 = .4900 ( Table A-2 indicates a value of 2.33) x-m / s / sqroot of n = (14.05-14.0)/ (.105)/sqroot of 8 = 1.347 Am I doing this right? Do I have my null hypothesis correct? If not, please demonstrate.

Subject:

Statistics

Topic:

All Topics

Posting ID:

3245

OTA ID:

103058

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A common problem in inferential statistics is constructing a confidence interval.

The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years. 1. Construct a 95% confidence level. 2. Now do the same thing with 80% confidence level.

Subject:

Statistics

Topic:

All Topics

Posting ID:

3246

OTA ID:

101202

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