Astudy is conducted to see if teenagers drive at faster average speeds than the general population of drivers. the average speed of the driving population is 35 mph. the null hypothesis is h 0: μaverage driving speed of teenagers = 35 mph. what is the alternative hypothesis?

Alternative Hypothesis-

H:  Teenagers' driving speed > 35 mph

Solution:

As per the question:

The purpose of the study is to check that whether the teenagers drive at average speed faster than the general drivers' population.

The mean or average of the population that drives is 35 mph.

Thus

Mean,

The null hypothesis as per the question:

Thus, the alternative hypothesis in order to check teenagers drive at faster average speed than the general population is given as:

H: The average driving speed of the teenagers is higher than 35 mph.

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz