Question

1.A technician in a testing facility tests the tensile strength of steel rebar from various suppliers that it is considering using. The tensile strength (in MPa) is the maximum stress that a material can withstand while being stretched or pulled without breaking. Let X = the tensile strength of steel rebar sample (in MPa). What type of random variable is this?

a.Discrete

b.It can be either

c.Continuous

d.There is not enough information to determine

2.Dr. Root would like to understand which topics are most confusing to students so she looks at the Canvas analytics to see how many times students view each class video. The Canvas dashboard reports how many times students have viewed any part of a video (that is, even if a student only watches the first 0:30 of a video, Canvas counts this as a view). Let X = number of times students have viewed a video. What type of random variable is this?

a.Continuous

b.There is not enough information to determine

c.Discrete

d.it can be either

3.Nest, a company that produces thermostats, tracks residential energy consumption and reports to users how many days they used their heat or cooling in a given month. Let X = the number of days a user used their heat in a given month. What type of random variable is this?

a.Continuous

b.There is not enough information to determine

c.Discrete

d.it can be either

4.With the increased prevalence of people working from their homes, an internet service provider is concerned with the download speeds for its customers. Let X = download speed (in KBps) of a randomly selected user. What type of random variable is this?

a.Continuous

b.There is not enough information to determine

c.Discrete

d.it can be either

Answer 1

son: Discrete 4 Continuous random variable! A discrete random variable while a conti all values in whose value is obtained random variable of members. by coun inting, x takes given interval © continuous (Tensile strength) © 2 Discrete ( No of times student have viewed a vedio) 3 Discrete ( No of days given month 4 Discrete #