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Q1) Create confidence interval for population mean µ
C= 0.98, Xbar=607, s=0.9, and n=51
A 98% confidence interval for µ is ?
Q2) Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
A biologist reports confidence interval of (2.5,3.9) when estimating mean height(in centimetres of sample of seedlings.
Estimated margin of error is ?
Sample mean is ?
Q3) Determine the critical value zc essential to form confidence interval at the level of confidence shown below
c-=0.96
zc = ?
Q4) Determine the margin of error for given values of c,s,and n
C = 0.90, s= 2.8 , n=36
E= ?
Either summarize your design or give an appropriate layout with table.
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Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
Consider a four digit uniform random number generator; as in each of the 10,000 values 0.0000 through 9999 is equally likely. Find the mean and variance of the values produced by such a random number generator.
A certain airplane has two independent alternators to provide electrical power.
Is there evidence to suggest that the training course helps out sales people?
A bag contains 5 blue balls and 8 purple balls. If 3 balls are chosen randomly and without replacement, form the bag. Let x be the number of blue balls obtained. Then x has a distribution.
Can we conclude that the mean time for a game is less than 3.50 hours? Use the .05 significance level.
What happens to the boundaries for the critical regions?
Use analysis of variance to test any differences in mean glue strengths.
Find out the correlation among the two variables in the regression. A simple linear regression produced the following computer output.
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