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Hypothesis testing.

How do I decide on formulas for Ho hypothesis? The manager of a paint supply store wants to determine whether the amount of paint contained in 1 gallon cans purchased from a nationally known manufacturer actually averages 1 gallon. It is known from the manufacturer's specifications that the standard deviation of the amount of paint is equal to 0.02 gallons. A random sample of 50 cans is selected and the mean amount of paint per 1 gallon can is found to be 0.995 gallons. State the null and alternative hypotheses Is there evidence that the mean amount is different from 1.0 gall (use alpha =0.01) Set up a 99% confidence interval estimate of the population average amount of pain... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

5031

OTA ID:

102454

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Hypothesis

The quality-control manager at a lightbulb factory needs to determine whether the mean life of a large shipment of lightbulbs is equal to the specified value of 375 hours. The process standard deviation is known to be 100 hours. A random sample of 64 lightbulbs indicates a sample mean life of 350 hours a. State the null and alternative hypothesis b. At the 0.05 level of significance is there evidence that the mean life is different from 375 hours? 95% confidence interval Ho: light bulbs = 375 hours Ho: light bulbs < 375 N=64 xbar=350 M+375 Std dev =64 350-375=-25 std dev divided by the sqr rt of N is 12.5 -25/12.5 is -2 look up on Z table is.0228 Is this correct not sure what to d... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

5039

OTA ID:

101733

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Statistics Multiple choice

MOVED TO STATISTICS BASED ON OTA FEEDBACK. In the following multiple-choice questions, circle the correct answer and give 1-3 line defense for your choice:

Subject:

Statistics

Topic:

All Topics

Posting ID:

5043

OTA ID:

103060

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For the following set of data determine whether it is appropriate to perform Factor analysis (check all necessary statistical tests, and residuals.)

For the following set of data determine whether it is appropriate to perform Factor analysis (check all necessary statistical tests, and residuals.)

Subject:

Statistics

Topic:

All Topics

Posting ID:

5048

OTA ID:

102607

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statistics

The time taken to install bumpers on cars passing through a particular assembly line is normally distributed with mean time u=2.00 minutes and standard deviation =36 minutes. A sample on n=100 is obtained and a mean bumper installation time X-bar will be calculated. 1. Find the value of standard deviation X bar. Determine the probability that Xbar will 2. Lie between 2.07 and 1.93 3. Exceed 1.98 minutes 4. Fall below 1.94 5. Lie between 2.02 and 2.08 6. Fall above 2.05 I am having problems solving these for the question, I have 0.27 and then I subtracted 0.27 from 2.0 and then divided 0.27 from the total of each side and came up with 6.94 and -5.68 with a probabillity of 1.26. ... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

5054

OTA ID:

101733

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