Calculate 95 percent confidence intervals for the means of the following set of numbers: 15.9, 18, 10, 14, 23. 14. 11.15.

Twenty car salespeople were sampled to see how many cars they sold in a month; the following data was obtained: 18, 18, 23, 17, 22, 23, 24, 25, 21, 17, 14, 14, 27, 16, 21, 25, 19, 28, 18, 22 Construct a 88% confidence interval for the mean number of cars sold per month by the population of car salespeople. S = || Margine of Error: E = cars We are 88% confident that, on average, car salespeople sell between and cars per month. Question Help: D Post to forum

What prerequisites should students have the knowledge of before calculating the confidence intervals for two population means?

A random sample of 100 m&m's produced 17 green m&m's.  What is the point estimate for the population proportion of green m&m's?  Construct the 95% confidence interval for the true proportion of green m&m's

There is a sample of 30 people and their shower times. What is the 95% confidence interval when sample mean is 23.50 minutes and standard deviation is 9.69 minutes?

An auditor takes a random sample of 880880 invoices from the 9510 invoices relating to the activities of a company in 2019. The sample mean value of the sampled invoices was £126 and the sample standard deviation was £58. Find a 99% confidence interval for the mean value of all the invoices for 2019. Round to 3 decimal places The records of the company states that the total income from the 9510 invoices was £1150710. The auditor's sample evidence does not support this stated total. True or false?  What is the probability, rounded to 3 decimal places, that the company's income does not exceed the value in the records?

Twenty-five fast-food restaurant hourly employees were surveyed to see how many hours they worked per week, on average. The following data was obtained:31, 43, 33, 20, 46, 52, 34, 26, 30, 40, 28, 44, 3, 46, 51, 43, 24, 31, 37, 55, 41, 42, 38, 24, 28Construct a 99% confidence interval for the mean number of hours per week that the population of fast-food restaurant employees work.xˉ=s=α2=tα2=Margin of Error: E=We are 99% confident that fast-food restaurant hourly employees, on average, work between___ hours and  ___hours per week.

In order to estimate the percentage of adults who file their taxes at least two weeks be deadline, a 99% confidence interval is constructed. The interval ends up being from 0.756 to 0.864. Which of the following could be a 90% confidence interval for the same sample data? I. 0.749 to 0.871 II. 0.776 to 0.844 III. 0.765 to 0.875 IV. 0.799 to 0.841 OI only OIV only None of the answer options are reasonable 90% confidence intervals. III only O II only

The number of unhealthy days based on the AQI (air quality index) for a random sample of metropolitan areas is shown. Construct an 80% confidence interval based on the data. Assume the variable is normally distributed. 23, 21, 14, 5, 40, 61, 39, 1, 0, 16

Suppose that a garage samples 21 customers. They find the average time for there oil change is 4,305 miles. Find a 90% confidence interval of the true mean, if the population standard deviation is 1,151. What is the upper bound of the confidence interval? (round to the correct integer)