Multiple Choice
A psychologist is collecting data on the time it takes to learn a certain task.For 50 randomly selected adult subjects,the sample mean is 16.40 minutes and the sample standard deviation is 4.00 minutes.The 95% confidence interval for the mean time required by all adults to learn the task would be _____.
A) [8.56,24.24]
B) [15.47,17.33]
C) [16.24,16.56]
D) [15.26,17.54]
E) [17.12,48.48]
Correct Answer:
Verified
Correct Answer:
Verified
Q1: In a poll of 1,004 adults,934 indicated
Q2: For a fixed sample size and
Q4: What sample size is needed to obtain
Q5: As the standard deviation decreases,the width of
Q6: The weight of a product is
Q7: As the significance level,? increases,the width of
Q9: When the level of confidence and
Q10: A sample of 2,000 people yielded
Q11: A marketing research company surveyed grocery
Q34: What is a 95 percent confidence