Reply With Quotesta301 idea solution fall January 2012
Need solution urgently-sta301
Question 1: Marks: 7 + 3 = 10View more random threads:
a) A General Incorporated Mill’s packing machinery is known to pour dry cereal into economy size boxes with a standard deviation of 0.6 ounce. The two samples, taken from two machines, yield the following information:
Machine A Machine B
n1=21 n2=15
X1=21.9 X2=18.7
Assume the Machine-A is N(u1,0.36) and Machine-B is N(u2,0.36) , construct the 95.44% confidence interval estimate for .
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b) Why we call the standard deviation of sampling distribution of a statistic as the standard error of the statistic?
Question 2: Marks: 10
A random sample of 100 recorded deaths in an urban city during the past year showed an average life span of 71.8 years, with a standard deviation of 8.9 years. Does this seem to indicate that the average life span today is greater than the 70 years? (Use a 0.05 level of significance.)
Question 3: Marks: 10
A population consist of N = 4 numbers 1, 3, 4 and 5. Find the proportion of odd numbers in ALL possible samples of size n = 3 drawn without replacement by using the rule of combination.
Also construct the sampling distribution of the proportion of odd numbers and find mean and variance of the sampling distribution.
sta301 idea solution fall January 2012
sta301 idea solution fall January 2012
ttest requires lesson 40-41.while the assignment is subjected to lectures 31-37
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