Question: please explain Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.0 minutes. Assume the standard deviation

please explain

Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.0 minutes. Assume the standard deviation is o = 8.0 minutes. Suppose that a simple random sample of 104 visits was selected this year and has a sample mean of x = 19.0 minutes. A social scientist is interested to know whether the mean time of Facebook visits has decreased. Use the a = 0.01 level of significance and the P-value method with the TI-84 calculator. (a) State the appropriate null and alternate hypotheses. (b) Compute the P-value. (c) State a conclusion. Use the a = 0.01 level of significance

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Please explain Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 19.9 minutes. Assume the standard deviation is o = 6.0 minutes. Suppose that a simple random...

Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.8 minutes. Assume the standard deviation is o = 8.0 minutes. Suppose that a simple random sample of 107...

Coffee: The National Coffee Association reported that 61% of U.S. adults drink coffee daily. A random sample of 250 U.S. adults is selected. Round your answers to at least four decimal places as...

Facebook : A study showed that two years ago, the mean time spent per visit to Facebook was 20.0 minutes. Assume the standard deviation is =8.0 minutes. Suppose that a simple random sample of 104...

Can someone please help me on this problem? Thank you! Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.0 minutes. Assume the standard deviation is o -...

Facebook: A study showed that two years ago, the mean time spent per visit to Facebook was 20.8 minutes. Assume the standard deviation is 6 = 8.0 minutes. Suppose that a simple random sample of 107...

Find the critical value(s). Round the answer(s) to three decimal places, if necessary. If there is more than one critical value, separate them with commas. Critical value(s): C] Facebook: A study...

Facebook A study showed that two years ago the mean time spent per visit to Facebook was 20 8 minutes Assume the standard deviation is a 8 0 minutes Suppose that a simple random sample of 105 visits...

A combination lock has 50 numbers on it. To open it, you turn counterclockwise to a number, then rotate clockwise to a second number, and then counterclockwise to the third number. Repetitions are...

Consider the parabola at right: a. Graph the parabola on your calculator. What two functions did you use? b. Combine both functions from 6a using notation to create a single relation. Square both...

8. Describe the growth of the economic role of the federal government since the 1930s.

A restaurant orders supplies every 3 days. The lead time for deliveries is 4 days. Demand for butter averages 12 pounds per day with a standard deviation of 1.5 pounds. The holding cost for butter is...

1. Discuss the following statements: a) Local links generate collective behaviours. b) An unfamiliar system will be described as chaotic by the ignorant. c) When we see that something is happening,...

2. In this chapter, the reader should reflect on the following concepts: Linear relationships, circular relationships, patterns, critical variables and sociological laws.

2. As your starting point, take a situation at your workplace that often recurs, and answer the following questions: (a) Which elements are included? (b) How are the elements related to each other?...