Essay
In a random sample of 26 laptop computers, the mean repair cost was $131 with a standard deviation of $38. Assume the population has a normal distribution. Construct a 95% confidence interval for the population mean, ?. Suppose you did some research on repair costs for laptop computers and found that the standard deviation is 
. Use the normal distribution to construct a 95% confidence interval for the population mean, ?. Compare the results. Round to the nearest cent.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: A local outdoor equipment store is being
Q2: A random sample of 20 electricians is
Q4: Determine the critical value <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB10223/.jpg" alt="Determine
Q5: The general form of a large-sample (1
Q6: Find the t-value.<br>-Let <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB10223/.jpg" alt="Find the
Q7: A simple random sample of size n
Q8: Determine the point estimate of the population
Q9: What is the best point estimate for
Q10: Find the t-value.<br>-Find the t-value such that
Q11: In a random sample of 60 dog