Answer:
The 95% confidence interval for the population mean commute time is between 29.33 minutes and 32.67 minutes.
Step-by-step explanation:
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 37 - 1 = 36
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 36 degrees of freedom(y-axis) and a confidence level of . So we have T = 2.0262
The margin of error is:
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 31 - 1.67 = 29.33 minutes
The upper end of the interval is the sample mean added to M. So it is 31 + 1.67 = 32.67 minutes.
The 95% confidence interval for the population mean commute time is between 29.33 minutes and 32.67 minutes.
Answer:
understandable
Step-by-step explanation:
Answer:
b. SAS
Step-by-step explanation:
SAS stands for Side Angle Side
The first Side being AB or BC
The Angle being ∡ABD and ∡CBD
And the last Side being BD
In order to simplify the expression (b+11)2b, we need to use the concept of distributive property.
Distributive property:
The distributive property of multiplication over addition can be used when you multiply a number by a sum.
Our expression is:
2b(b+11)
Applying distributive property here :
Answer:
The range of acceptable values will be 15.85 oz to 16.15 oz
<h3>Error and allowances</h3>
Given the following information
The measure of the company's box = 16-oz
If the discrepancy in weight is more than 0.15 oz, the range of acceptable values will be given as:
Higher limit = 16 + 0.15 = 16.15oz
Lower limit = 16 - 0.15 = 15.85-oz
Hence the range of acceptable values will be 15.85 oz to 16.15 oz
Learn more on error and allowances here: brainly.com/question/11472659