i). Determine the interval estimate of the population mean with 99% confidence.
ii). Determine the 95% confidence interval estimate of the population mean with sample size as 300.
i). Estimate the probability that a randomly selected adult Australian will play spots more than 5 hours a day
ii). Probability that if 4 person are randomly selected, their average numbers of hours spending on playing sports more than 5 hours per day
iii). Probability that of 4 adult Australians are randomly selected that all 4 will play sports more than 5 hour a day…….
The question has projected a normal distribution of the time that a teenager spends over the internet
Standard Deviation = 1.5 hours
Sample size = 100 individuals
Mean = 6.5 hours
Calculation of the standard error of mean:
The estimation of Interval Estimates:
= Mean – (Reliability Coefficient*SEM) to Mean + (Reliability Coefficient*SEM)
Confidence is 2.575 at reliability coefficient 99%