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MINI CASE 5.6
By breaking down the figures into their constituent parts and stacking the graphs you can see how things have changed over time and, in this example, how they might change in the future both in overall figures and the numbers in each group. This has been done below by the Institute of Grocery Distribution for the UK population growth.
The UK population is increasing
? The UK population is expected to grow to 71 million people by 2031.
? Growth between 2008 and 2031 is expected to be at a greater rate in England (17 per cent to 60.1 million) than in the other countries making up the UK.
? The population in Wales is expected to grow at 11 per cent to 3.3 million. Northern Ireland population is expected to grow by 13 per cent to 2 million, while Scotland expects slower growth of 7 per cent to give a population in 2031 of 5.5 million.
A 2005 survey of Internet users reported that 22% downloaded music onto their computers. The ?ling of lawsuits by the recording industry may be a reason why this percent has decreased from the estimate of 29% from a survey taken two years before.
Service times are exponentially distributed and average 24 per hour. Customers that arrive when all seats are taken do not enter the diner. The probability that there are no customers in the diner is?
Use the decision rule associated with part (a) and a range of selected assumed values for µ in constructing the power curve for the test.
What is the probability that the sample proportion is less than 0.5? What is the upper limit of the sample proportion such that only 3%of the time the sample proportion would exceed this value
Explain the purpose of the critical value in a hypothesis test, how do you find the critical value and what purpose does it play?
1. in a well known quiz show the contestant is asked to choose between door number 1 door number 2 and door
In a three-digit lottery, each of the three digits is supposed to have the same probability of occurrence (counting initial blanks as zeros, e.g., 32 is treated as 032). Calculate the Chi-square test statistic, degrees of freedom and the p-value
The Internal Revenue Service (IRS) provides a toll-free help line for taxpayers to call in and get answers to questions as they prepare their tax returns.
If one of these respondents is randomly selected, what is the probability of getting someone who has been in a car accident?
Civilization is a way of doing business? Using the examples that we have learnt thus far, answer these questions. 1. What were the main types of business (economic activity) in the Ancient world?
managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line
A woman sells an average of 300 books per month, with a standard deviation of 50. Over the next ten years, how many months will she sell more than 375 books?
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