Suppose that 20% of all sharemarket investors are retirees. Suppose a random sample of 25 sharemarket investors
Question:
Suppose that 20% of all sharemarket investors are retirees. Suppose a random sample of 25 sharemarket investors is taken.
(a) What is the probability that exactly 7 are retirees?
(b) What is the probability that 10 or more are retirees?
(c) How many retirees would you expect to find in a random sample of 25 sharemarket investors?
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n 25 p 20 retired from Table A2 PX 7 111 PX 10 1 PX 9 1 9827 0173 Expected Value nP 2520 5 n 20 P 40 mutual funds PX 8 180 PX 6 PX 5 1256 PX 0 000 PX ...View the full answer
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Related Book For 
Business Analytics And Statistics
ISBN: 9780730363330
1st Edition
Authors: Ken Black, John Asafu Adjaye, Paul Burke, Nelson Perera, Carl Sherwood, Saleh A. Wasimi
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