The 90% confidence interval is _________, _______________ (round to 2 decimal places) The 95% confidence interval is _________, _______________(round to 2 decimal places) Which interval is wider The 90% confidence interval or 95% confidence interval Interpret the results: A. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% interval and 95% confidence interval B. You can be certain the closing price of the stock was within the 90% confidence interval for approximately 36 of the confidence interval for approximately 38 of the 40 days. C. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval and 95% interval. D. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% bounds of the 90% and 95% confidence intervals.
Section 6.1, please help with TI-84 commands if possible
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals.
From a random sample of 40 business days, the mean closing price of a certain stock was $124.93. Assume the population standard deviation is $11.04.
The 90% confidence interval is _________, _______________ (round to 2 decimal places)
The 95% confidence interval is _________, _______________(round to 2 decimal places)
Which interval is wider
The 90% confidence interval or 95% confidence interval
Interpret the results:
A. You can be 90% confident that the population mean price of the stock is outside the bounds of the 90% interval and 95% confidence interval
B. You can be certain the closing price of the stock was within the 90% confidence interval for approximately 36 of the confidence interval for approximately 38 of the 40 days.
C. You can be 90% confident that the population mean price of the stock is between the bounds of the 90% confidence interval and 95% interval.
D. You can be certain that the population mean price of the stock is either between the lower bounds of the 90% and 95% bounds of the 90% and 95% confidence intervals.
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