Is your favorite TV program often interrupted by advertising? CNBC presented statistics
on the average number of programming minutes in a half-hour sitcom (CNBC, February
23, 2006). The following data (in minutes) are representative of their findings.

21.0621.6623.8221.5220.0222.3723.36 22.2421.2320.321.9122.222.1923.4420 .6223.8621.5223.1421.222.34
21.06
21.66
23.82
21.52
20.02
22.37
23.36


22.24
21.23
20.3
21.91
22.2
22.19
23.44


20.62
23.86
21.52
23.14
21.2
22.34


Assume the population is approximately normal. Provide a point estimate and a 95% confidence
interval for the mean number of programming minutes during a half-hour television
sitcom.

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: