Answer:
i. A bar graph is an appropriate display.
ii. A bar graph is appropriate because the frequencies are given.
Step-by-step explanation:
A bar graph is a graphical method that can be used to present an information from a sample of data. It requires drawing of bars of equal width and distance with respect to the information given.
While a pie chart is a method that requires presenting information in a circular chart with respect to each data in sectors of different central angles.
For the given question, the most appropriate method to use is the bar graph with respect to the given information. Thus, the statements that are correct about the data in the table are:
i. A bar graph is an appropriate display.
ii. A bar graph is appropriate because the frequencies are given.
Answer:
For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:
Null hypothesis: ![p =0.2](https://tex.z-dn.net/?f=%20p%20%3D0.2)
Alternative hypothesis: ![p >0.2](https://tex.z-dn.net/?f=p%20%3E0.2)
And for this case we should use a righ tail test based on the alternative hypothesis.
Step-by-step explanation:
Previous concepts
A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".
The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".
The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".
Solution to the problem
For this case we want to test if in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone (alternative hypothesis) and the complement would be the the null hypothesis. So then the system of hypothesis are:
Null hypothesis: ![p =0.2](https://tex.z-dn.net/?f=%20p%20%3D0.2)
Alternative hypothesis: ![p >0.2](https://tex.z-dn.net/?f=p%20%3E0.2)
And for this case we should use a righ tail test based on the alternative hypothesis.
Answer:
4
Step-by-step explanation:
A carpenter uses 4 nails to install each shelve
Convert it into an improper fraction. Find your common denominator then subtract. If this doesn’t help let me know.
Answer:
it's to late I'm sorry I couldn't make it in time