How Different? For this discussion, you will compare a group of acquaintances to the population in...
How Different? For this discussion, you will compare a group of acquaintances to the population in regards to social media use. Consider the following: Analyzes of national data have suggested that the adult population uses social media an average of 3 hours per day, with a standard deviation of 1 hour. Develop a main response in which you address the following: Ask a group of friends (or other acquaintances) how many hours they spent on social media the previous day. Calculate the mean for this group (this is your sample mean). Use this value, along with the population mean and standard deviation provided above, to conduct a one-sample z-test. Share your z-test and the results on the discussion board. Explain whether or not the difference between your sample and the population is statistically significant. Discuss some reasons for this significant difference or lack thereof.
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How Different? For this discussion, you will compare a group of
acquaintances to the population in...
1) Timothy has finished calculating a z-test. Now he turns to the table of z-scores to...
1) Timothy has finished calculating a z-test. Now he turns to the table of z-scores to find the: a) Critical value b) Test value c) calculated value d) obtained value 2) Joyce has calculated a Z-test with an alpha set to .05. She calculates a z-value of 6.36. What can she conclude? a) none of these b) reject the null hypothesis c) fail to reject the null hypothesis d) the result is too close to call 3) In order to...
A random sample of n - 16 scores is selecdted from a normal population with a...
A random sample of n - 16 scores is selecdted from a normal population with a mean of p - 50. After atreatment is administered to the individuals in the sample, the sample mean is found to be M -54 If the population standard deviation is σ-8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α-.05. (Hint: Recall that the critical value for a two-tailed test with α-.05 is...
In a study done in 2015, it was estimated that about 45% of the world’s population...
In a study done in 2015, it was estimated that about 45% of the world’s population used some form of online social media. The average time spent per day by social media users was found to be 2.49 hours per day, with a standard deviation of 0.515 hours. Assume the distribution of this data to be normal. a) What is the probability that a randomly chosen social media user spends more than 3.00 hours per day on social media? b)...
Compare the different Genders of subjects in the Psych_Data.xlsx data set to determine if there is...
Compare the different Genders of subjects in
the Psych_Data.xlsx data set to determine if there is a
statistically significant difference in the mean
Anxiety Scores (anx_score) between the different
gender groups. Be sure to state the type of test, state the Ho and
Ha, include all relevant Excel results and plots, and write final
conclusions for the full results of the test in context. Be sure
that your final conclusions are written in common terms for an
average person to...
PLEASE HELP! Z-test or T-test? Give a full explanation please! A researcher wants to compare the...
PLEASE HELP! Z-test or T-test? Give a full explanation please! A researcher wants to compare the email use of the employees at one company to the corresponding population. Data is collected on the number of emails received by the company's employees. It will be necessary to use this sample data, as well as population data to determine if there is a significant difference between both. Population Mean number of emails: 25 Standard deviation: 3 Sample Mean number of emails: 20...
A random sample of 46 college students reported the number of hours per day they typically...
A random sample of 46 college students reported the number of hours per day they typically spend on social media. Their sample mean is, M = 2.61, and their standard deviation is, s = 1.02. What is the point estimate of the mean time spent per day on social media for the population of college students?
In hypothesis testing for a population mean, the term "significant difference" implies a: A) difference between...
In hypothesis testing for a population mean, the term "significant difference" implies a: A) difference between the sample mean and the hypothesized population mean that leads to the rejection of the null hypothesis. B) difference between the test statistic and the critical region. C) difference between the one-sided test and the two-sided test. D) difference between the sample standard deviation and the population standard deviation.
A random sample of 49 measurements from a population with population standard deviation o 3 had...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
Notation for hypothesis tests about a population mean Suppose you are conducting a study about how...
Notation for hypothesis tests about a population mean Suppose you are conducting a study about how the average US worker spends time over the course of a workday. You are interested in how much time workers spend per day on personal calls, emails, and social networking websites, as well as how much time they spend socializing with coworkers versus actually working. The most recent census provides data for the entire population of US workers on variables such as travel time...
on 6 A sample n.25 is selected from a population with mean, u = 50, 0=...
on 6 A sample n.25 is selected from a population with mean, u = 50, 0= 10, a researcher calculated the sample mean, M - 55. Assuming the researcher was performing a two-tailed test, is the sample mean significantly different from the population mean? For the test, a -.05. ed out of Select one: O a.p=0.4938, no difference between the sample mean and the population mean O b.p = 0.0062, significant difference between the sample mean and the population mean...
A random sample of n - 16 scores is selecdted from a normal population with a mean of p - 50. After atreatment is administered to the individuals in the sample, the sample mean is found to be M -54 If the population standard deviation is σ-8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α-.05. (Hint: Recall that the critical value for a two-tailed test with α-.05 is...
Compare the different Genders of subjects in
the Psych_Data.xlsx data set to determine if there is a
statistically significant difference in the mean
Anxiety Scores (anx_score) between the different
gender groups. Be sure to state the type of test, state the Ho and
Ha, include all relevant Excel results and plots, and write final
conclusions for the full results of the test in context. Be sure
that your final conclusions are written in common terms for an
average person to...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
on 6 A sample n.25 is selected from a population with mean, u = 50, 0= 10, a researcher calculated the sample mean, M - 55. Assuming the researcher was performing a two-tailed test, is the sample mean significantly different from the population mean? For the test, a -.05. ed out of Select one: O a.p=0.4938, no difference between the sample mean and the population mean O b.p = 0.0062, significant difference between the sample mean and the population mean...
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