Answer to Question #139994 in Statistics and Probability for Manqoba Gebashe

Question

A research firm conducted a survey to determine the mean amount of money smokers spend on cigarettes during a day. A sample of 100 smokers revealed that the sample mean is N$ 5.24 and sample standard deviation is N$ 2.18 Assume that the sample was drawn from a normal population.

2.1) Find the point estimate of the population mean (2)

2.2) Determine the lower limit of the 95% confidence interval for estimating the unknown population mean. (5)

2.3) Determine the upper limit of the 95% confidence interval for estimating the unknown population mean. (3)

2.4) Find the width of the 95% confidence interval for estimating the unknown population mean (2)

2.5) Use the data provided above to test a claim at a 1 % Level of Significance that the unknown population mean of spending amount on cigarettes is N$ 5.00 (8)

Answer 1

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