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.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

object 2 because all the other ones are wrong