1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
svetlana [45]
3 years ago
5

We want to have a survey and ask people working for IT companies if they prefer Skype to mobile phones for making calls. We want

to show that in IT companies more than 20% of employees prefer to use Skype rather than a mobile phone. The null hypothesis is H0:p=0.2H0:p=0.2. State the alternative hypothesis and find out if we should use a left-tail, a right-tail or a two-tailed test to support the alternative hypothesis.
Mathematics
1 answer:
weqwewe [10]3 years ago
6 0

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

Alternative hypothesis: p >0.2

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

Alternative hypothesis: p >0.2

And for this case we should use a righ tail test based on the alternative hypothesis.

You might be interested in
the distance in feet that Karina swims in a race is represent by 8d - 8, where d is the distance for each lap.What is an express
sergij07 [2.7K]

Answer:    The equivalent expression for  is  

Step-by-step explanation:

The distance in feet that Karina swims in a race is represented by 4d - 4, where is d is the distance for each lap.

To get equivalent expression we factor the expression 4d-4

Greatest common factor is 4

Factor out 4 from the expression 4d-4

when we factor out 4, we divide each term by 4

The equivalent expression for  is

Step-by-step explanation:

4 0
3 years ago
Find the missing number: 70, 102, ?, 178, 222
irakobra [83]

Answer:

138

Step-by-step explanation:

70 + 32 = 102

102 + 36 = 138

138 + 40 = 178

178 + 44 = 222

4 0
3 years ago
What is 100 divided by 80
Molodets [167]
10/8 or 5/4 or 1 1/4 or 1.25 or 125 percent.
3 0
3 years ago
Read 2 more answers
Help ASAP please!!!
Flura [38]
D all the above. I had this question also
7 0
3 years ago
Which of the following are irrational numbers?<br><br> 3.14<br> √ 5<br> 0.3333<br> √ -4<br> 1/9
Galina-37 [17]

Answer:

√ -4

Step-by-step explanation:

all square roots of negative numbers are irrational

6 0
3 years ago
Other questions:
  • Use a table of function values to approximate an x-value in which the exponential function exceeds the polynomial function. f(x)
    9·2 answers
  • Is this correct?<br><br> Help
    9·2 answers
  • Solve and check: 1 x + 3 = x + 10 x − 2 From least to greatest, the solutions are x = and x = .
    9·2 answers
  • If a median, an altitude, and an angle bisector are the same segment in a triangle, the triangle is scalene
    14·1 answer
  • An elephant walks into a store and buys 9 bags of peanuts for the same price. He also decides he wants to buy a hat for $6.35. I
    10·2 answers
  • What equation models the data in the table if d = number of days and c = cost?
    10·1 answer
  • Find the lateral surface area of this
    5·2 answers
  • Graph this line using the slope and intercept <br> -8x+2 Show graph too
    5·1 answer
  • The perimeter of a rectangular
    10·1 answer
  • Help please and ill mark you brainliest :)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!