xRate of return yRate of Return Date -4.75 7.65 Month 1 Month 2 Month 3 Month 4 -4.76 5.34 12.09 -2.98 6.98 9.65 Calculate the covariance per month between the two companies. Show all your working.
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- In a certain city, the daily consumption of electricpower in millions of kilowatt-hours can be treated as arandom variable having a gamma distribution with α = 3and β = 2. If the power plant of this city has a daily capacity of 12 million kilowatt-hours, what is the prob-ability that this power supply will be inadequate on any given day?From past records a firm has noted that the average time its employees take for tea break is 15 minutes , with variance 4 minutes. A new employee joins the firm and over 50 tea breaks he has been observed to take an average time of 17 minutes. Should the manager caution him about taking too long a time over his tea break ?