Question

In: Statistics and Probability

Many people find that they spend a lot of time on their smartphones each day without...

Many people find that they spend a lot of time on their smartphones each day without realizing how long they are scrolling through apps or playing games. A researcher wanted to test whether a mindfulness intervention would help people be more aware of how much time they spend on their phones, and if this might lead to decreased time spent on their phones each day. To perform this study, participants used an app that tracks phone usage in minutes the week before the mindfulness intervention, and the week after the intervention. Hypothetical data (in minutes) are provided in the table

before after
160 153
125 124
142 136
187 167

1.) What are the populations in this study?

2.) What is the mean of the Distribution of Means of Difference Scores?

3.) Calculate the t-statistic at a p level of 0.05 and identify the critical t-values

4.) What is the 95 percent Confidence Interval?

Solutions

Expert Solution

Dear student,
I am waiting for your feedback. I have given my 100% to solve your queries. If you satisfied with my answer then please please like this.
Thank You

orchestra answered 1 year ago
Next > < Previous

Related Solutions

Data for the amount of time that Americans spend commuting to work each day creates a...
Data for the amount of time that Americans spend commuting to work each day creates a histogram that has a normal shape. The mean is 35 minutes and the standard deviation is 10 minutes. According to the Empirical Rule, which of the following is not a conclusion that we can make? a. It would be common to find a commuter who takes 43 minutes to commute to work. b. About 5% of commuters take longer than 55 minutes to commute...
A high school student wants to find out how much screen time people spend on their...
A high school student wants to find out how much screen time people spend on their phones. He does a random sample and finds the following data for screen time (in minutes): 195 250 180 175 120 60 300 210 193 135 200 265 Construct and interpret a 95% confidence interval for the mean amount of screen time people have on their phones.  Remember to check all necessary critera.
You may believe that each day, married and unmarried women spend the same amount of time...
You may believe that each day, married and unmarried women spend the same amount of time per week using Facebook. We would like to test this hypothesis. A random sample of 45 married women who use Facebook spent an average of 3.0 hours per week on this social media website. A random sample of 39 unmarried women who regularly use Facebook spent an average of 3.4 hours per week. Assume that the weekly Facebook time for married women has a...
Children of Acklins spend a lot of time playing in the very calm and shallow water....
Children of Acklins spend a lot of time playing in the very calm and shallow water. Another of their favorite pastimes is collecting Styrofoam blocks that wash up on their normally prestine beaches. The children have styrofoam blocks that are 0.75m, 0.50m wide and 0.25m high. Little Johnny has started piling dry sand into blocks that he is pretending is a boat. Determine the (i) depth to which the stryofoam block sinks without any sand (the depth of immersed styrofoam)...
At the time that the ACA was passed, the number of people without health insurance in...
At the time that the ACA was passed, the number of people without health insurance in the United States at any point in time was approximately: Group of answer choices a. 25 million. b. 40 million. c. 50 million. d. 65 million.
The amount of time that people spend at Grover Hot Springs is normally distributed with a...
The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 71 minutes and a standard deviation of 17 minutes. Suppose one person at the hot springs is randomly chosen. Let X = the amount of time that person spent at Grover Hot Springs . Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(Correct,Correct)   b. Find the probability that a randomly selected person...
The amount of time that people spend at Grover Hot Springs is normally distributed with a...
The amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 80 minutes and a standard deviation of 14 minutes. Suppose one person at the hot springs is randomly chosen. Let X = the amount of time that person spent at Grover Hot Springs . Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. Find the probability that a randomly selected person...
Customarily, people tend to spend most of their time indoor at home and in the workplace....
Customarily, people tend to spend most of their time indoor at home and in the workplace. As such, it is essential to improve Indoor Environmental Quality (IEQ) to enhance occupants’ health and wellbeing. Recommend three (3) IEQ aspects including daylighting and rationalise their interrelations with design decisions supported by scientific evidences or means to secure office building users’ comfort, health, and productivity.
19a. (2pts) The Inuit people of Greenland spend most of their day in freezing cold temperatures....
19a. (2pts) The Inuit people of Greenland spend most of their day in freezing cold temperatures. Why would these people express an “uncoupler” protein? __________________________________ ________________________________________________________________________________ 19b. (2pts) Compared to you, do the Inuit people make MORE or LESS ATP for each glucose molecule that they process? _________________________________________________________ ________________________________________________________________________________
If you spend $24.00 on average each day eating fast food, how much will you spend...
If you spend $24.00 on average each day eating fast food, how much will you spend on average each month? Assume 30 days in a month.
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT