Question 8 of 10 These box plots show daily low temperatures for a sample of days in two different towns. Town 15 20 40 45 Town
B 35 40 45 48 TH 5 10 20 45 50 55 80 25 30 35 40 Degrees (F) Which statement is the most appropriate comparison of the centers? A. The median for town A, 15°, is greater than the median for town B, 2. B. The mean for town A, 30°, is less than the mean for town B, 40°. O C. The median temperature for both towns is 40°. D. The median for town A, 30°, is less than the median for town B, 40° no files, links, or anything like thats i just want a straight forward answer please help
1 answer:
You might be interested in
Answer:
The smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.
Step-by-step explanation:
The complete question is:
The mean salary of people living in a certain city is $37,500 with a standard deviation of $2,103. A sample of n people will be selected at random from those living in the city. Find the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income. Round your answer up to the next largest whole number.
Solution:
The (1 - <em>α</em>)% confidence interval for population mean is:
The margin of error for this interval is:
The critical value of <em>z</em> for 90% confidence level is:
<em>z</em> = 1.645
Compute the required sample size as follows:
Thus, the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.