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Question:
(a) Suppose that 100 tires made by Bridgestone last on average 21,819 miles with a standard deviation of 1,295 miles. Test the null hypothesis µ = 22, 000 miles against the alternative hypothesis µ < 22, 000 miles at the 5% level of con?dence.
(b) It is decided that H0 is rejected if the sample mean is less than 21,819. Using the same information in part (a) above, except for the 5% level of con?dence, calculate
(i) P(H0 is accepted | H1 is true with µ = 21, 500).(ii) the power of the test.
(c) The results of 100 students who have taken part in examinations on Probability and Statistics during the past few years can be summarised as follows. Out of 42 males, 30 have passed and out of 58 females, only 34 have passed. Test at the 5% signi?cance level whether there is a relationship between gender and success in modules of Probability and Statistics.
X purchased a machinery on instalment system for rs.27300 to be paid as follows. on delivery rs.8000, at the end of first year rs.7600, at the end of second years.6000, at the end
define standard deviation. their purpose,uses,advantages nd disadvantages,examples ,formula for grouped and ungrouped.
Base year price 10,12,18,20 and quantity 49,25,10,5 respectively. current yr quantity 50,20,12& 2
uses of time series
I have four assignments that are due tomorrow. Can you help?
Discrete Standard Deviation For calculating standard deviation in discrete series any of the following methods may be applied (1) Actual mean method. (2) Assumed mean method. (
Distinguish between primary and secondary data. What are the methods of collecting primary data?
A car moves with constant velocity along a straight road. Its position is x1 = 0m at t1 = 0 seconds and is x2 = 56 m at t2 = 5.0 s. what is the cars position at t=2.5 seconds and
Suppose an individual has a lifetime earnings profile and expects to live for 4 Periods: Earnings in Period 1: $30 Earnings in Period 2: $60
what is the relationship of cost accounting to financial and management accounting?
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