Multiple Choice
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week.Based on a simple random sample,they surveyed 144 students.The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours.What is the probability that average student study time is between 18 and 22 hours?
A) 0.9640
B) 0.0160
C) 0.0360
D) 0.9840
Correct Answer:
Verified
Correct Answer:
Verified
Q8: The mean of all possible sample means
Q8: Suppose we select every fifth invoice in
Q10: An estimate of the population mean based
Q14: Sampling a population is often necessary because
Q15: Based on the central limit theorem,sampling error
Q16: If a population is not normally distributed,the
Q62: Sampling from a population may be preferred,
Q63: Based on the central limit theorem, sampling
Q70: The mean of all possible sample means
Q102: A statewide sample survey is to be