Mathematics, 27.11.2019 20:31 snoopy112007
18. a simple random sample of size n is drawn from a population that is normally distributed. the sample mean, x, is found to be 50, and the sample standard deviation, s, is found to be 8. (a) construct a 98% confidence interval for m if the sample size, n, is 20. (b) construct a 98% confidence interval for m if the sample size, n, is 15. how does decreasing the sample size affect the margin of error, e? (c) construct a 95% confidence interval for m if the sample size, n, is 20. compare the results to those obtained in part (a). how does decreasing the level of confidence affect the margin of error, e? (d) could we have computed the confidence intervals in parts (a)–(c) if the population had not been normally distributed? why?
Answers: 1
Mathematics, 21.06.2019 16:00
Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?
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Mathematics, 21.06.2019 16:30
International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?
Answers: 2
18. a simple random sample of size n is drawn from a population that is normally distributed. the sa...
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