The Next Questions Are Based on the Following Information

question 113

Essay

The Next Questions Are Based On The Following Information:
Research and development has designed a ball point pen so that the true average writing lifetime under controlled conditions (involving the use of a writing machine)is at least 12 hours.A random sample of 18 pens is selected,the writing lifetime of each is determined,and a normal probability plot of the resulting data supports the use of a one-sample t test.
-A company produces electrical devices operated by a thermostatic control.According to the engineering specifications,the standard deviation of the temperature at which these controls actually operate should not exceed 2.0 degrees Fahrenheit.For a random sample of 25 of these controls,the sample standard deviation of operating temperatures was 2.36 degrees Fahrenheit.Stating any assumptions you need to make,test at the 5% level the null hypothesis that the population standard deviation is at most 2.0 against the alternative that is bigger.

Recognize the role of cohesion and adhesion in water transport through plant tissues.

Describe the process of transpiration and its impact on plant water transport.

Explain how the pressure-flow model describes sugar movement in phloem.

Understand the distinction between different types of wood and their growth patterns.