Engineering, 12.12.2019 02:31 lizethyyaritza16
Sample size: determine the sample size needed to estimate the density of a new asphalt mix with a precision of 4.0 kg m-3 if the population standard deviation is unknown and the sample standard deviation is assumed to be 8.0 kg m-3 . use a significance level of 0.02. a. what is the confidence level? b. what sample size is estimated using the z distribution? can the z distribution be used? should the t distribution be used? explain. c. what sample size is estimated using the t distribution? document your work in a table, with sample calculations shown below the table.
Answers: 3
Another question on Engineering
Engineering, 03.07.2019 14:10
When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point
Answers: 3
Engineering, 04.07.2019 18:10
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Engineering, 04.07.2019 18:10
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Engineering, 04.07.2019 18:10
Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables
Answers: 1
You know the right answer?
Sample size: determine the sample size needed to estimate the density of a new asphalt mix with a p...
Questions
Mathematics, 29.10.2020 02:50
History, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
Computers and Technology, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
Mathematics, 29.10.2020 02:50
English, 29.10.2020 02:50
History, 29.10.2020 02:50
English, 29.10.2020 02:50
