Which of the following graphs represents the solutions of the following systems?
2 answers:
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Answer:
<em>Tim </em><em>will </em><em>get </em><em>£</em><em> </em><em>8</em>
<em>Sam </em><em>will </em><em>get </em><em>£</em><em> </em><em>3</em><em>2</em>
<em>Solution,</em>
<em>let </em><em>the </em><em>ratios </em><em>be </em><em>x </em><em>and </em><em>4</em><em>x</em>
<em></em>
<em>hope </em><em>this </em><em>helps.</em><em>.</em><em>.</em>
<em>Good </em><em>luck</em><em> on</em><em> your</em><em> assignment</em><em>.</em><em>.</em><em>.</em>
Answer:
7. μ=204.9 and σ=5.4968
8. μ=75.9 and σ=0.7136
9. p=0.9452
Step-by-step explanation:
7. - Given that the population mean =204.9 and the standard deviation is 81.90 and the sample size n=222.
-The sample mean,is calculated as:
-The standard deviation, is calculated as:
8. For a random variable X.
-Given a X's population mean is 75.9, standard deviation is 9.6 and a sample size of 181
-#The sample mean, is calculated as:
#The sample standard deviation is calculated as follows:
9. Given the population mean, μ=135.7 and σ=88 and n=59
#We calculate the sample mean;
#Sample standard deviation:
#The sample size, n=59 is at least 30, so we apply Central Limit Theorem:
Hence, the probability of a random sample's mean being greater than 117.4 is 0.9452