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Question:
(a) Packs of food have weights that are distributed with standard deviation 2.3 g. A random sample of 200 packets is taken. The mean weight of this sample is found to be 99.2 g. Calculate a 99% confidence interval for the population mean weight.
(b) Insects stick to a wall at random points. The mean number of insects is 2 per square metre. A wall with area 25 m2 is painted with a new type of paint which the manufacturer claims is insect repellent. It is found that 29 insects stick to this wall.
Use a suitable approximation to test the manufacturer's claim at the 1% significance level. Take the null hypothesis to be µ = 50, where µ is the population mean.
(c) Bottles of liquor are stacked in racks of 12. The weights of these bottles are normally distributed with mean 1.2 Kg and standard deviation 0.055 Kg. The weights of empty racks are normally distributed with mean 2 Kg and standard deviation 0.295 Kg.
(i) Show that the total weight of a full rack of 12 bottles of liquor follow a normal distribution with mean 16.4 Kg and variance 0.123.
(ii) Find the probability that the total weight of a full rack of 12 bottles of liquor is between 16.5 Kg and 17 Kg.
(iii) Two bottles of liquor are chosen at random. Find the probability that they differ in weight by less than 0.04 Kg.
Bonds payable The face worth of bonds issued and honorary. In the case of zero-coupon bonds, however, and the only and the accreted value of the tie is reported as bonds owed on t
How would you journalize this transaction? Purchased used truck for $6,240, paying $3,120 cash and the balance on account.
1. Penny Pincher, Inc. had a contribution margin of $33,000 on sales of $50,000 and had fixed costs of $18,000. Calculate its break-even point in sales dollars. 2. Krueger Company
a manufacturer claims that 60% of beer drinkers perfer his beer. A query with 30 beer drinkers selected at random showed that 16 of them prefer this brand.(a.)Does the evidence sup
It is a numerical average, as equal to the sum of terms in a given series divided by the number of terms in that series is the mean which is also called the expected value.
The square of the sample correlation coefficient is typically denoted r2 and called the coefficient of determination. It estimates the fraction of the variance in Y that is explain
uses of time series with example
Impact of government regulation on managerial Decision making Impact of government regulation on managerial Decision making how methods of control can influence market prices.
need to understand bank recon...
Use of Assets A potential upcoming financial advantage acquired or managed by a particular business due to past purchases or activities. These financial options can be concrete or
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