The accompanying dala gives the results of a survey on the number of hours spent online per week on a certain social networking website. Determine if the mean number of hours spent online per week is the same for males as it is for females. Assume that the population variances are unequalClick the icon to view the social media survey data.Is there sufficient evidence at the 0.05 level of significance that the mean number of hours spent online per week is the same for males as it is for females?Determine the null hypothesis, Ho, and the alternative hypothesis, H₁. Let females be population 1 and males be population 2.Survey dataHoH₁(Type integers or decimals. Do not round.)GenderFemaleHours online/weekGenderHours online/week D4MaleFemale11MaleFemale9MaleFemale8MaleFemale7MaleFemale13MaleFemale2MaleFemale6MaleFemale2MaleFemale6MaleFemale7MakeFemale3MaleFemaleFemaleFemaleFemaleFemaleFemaleFemaleFemale46021337Mole0653T504781458PrintDone- X

The given data for the working hours per week for individuals from both genders is as…

Answered: The accompanying data gives the results…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Which of the three measurements, mean, median, or mode, is the most influenced by an outlier value that is either much higher or lower than the others in the dataset? Explain how you chose your answer in the space provided below.
The tuition and fees (in thousands of dollars) for the top 14 universities in a recent year are listed below. Find the mean, median, and mode of the data, if possible. If any of these measures cannot be found or a measure does not represent the center of the data, explain why. 44 42 39 42 46 44 47 44 44 35 42 46 46 44 Find the mean cost. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. 000 A. The mean cost is 43.2. (Round to one decimal place as needed.) B. There is no mean cost. Does the mean represent the center of the data? A. The mean represents the center. B. The mean does not represent the center because it is the smallest data value. OC. The mean does not represent the center because it is the largest data value. D. The mean does not represent the center because it is not a data value. OE. There is no mean cost.
A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations. The following are the indices measured on a random sample of 16 children attending elementary school in a particular district. 48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57 For the data the mean index is 60.69 and the standard deviation is 8.26. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test: b) H0: c) HA: d) Test Statistic: e) Rejection region: f) Decision in the context of the problem:
A study of new home prices was conducted in a neighborhood of 2000 homes. The median price of a new home is reported to be $172,400 and the mean price is reported to be $196,000. describe the distribution of new home prices, explaining the relationship between the given median and mean. How many new homes cost more than $172,400?
A consumer research group purchased identical items in eight drugstores. The mean cost for the purchased items was $113.49. The mode was $112. Using the empirical relationship among mean, median, and mode, estimate the median and comment on the skewness of the distribution.
Give an example of a set of data that might be better represented by the median than the mean. Explain why.
A psychologist has designed an index to measure the social perspectives of elementary school children. The index is based on ratings of a child’s responses to questions about a set of photographs showing different social situations. The following are the indices measured on a random sample of 16 children attending elementary school in a particular district. 48, 75, 69, 58, 60, 68, 59, 66, 71, 52, 49, 60, 54, 55, 70, 57 For the data the mean index is 60.69 and the standard deviation is 8.26. The confidence interval is 95%, with a level of significance of 0.05. Perform a statistical test to determine if the population mean index is greater than 50. a) Name of hypothesis test: b) H0: c) HA: d) Test Statistic: e) Rejection region: f) Decision in the context of the problem:
A researcher wants to analyse whether there is a relationship between country of origin of International students in Sydney and the suburb they currently live in. Suggest data collection approach for the researcher.
Colleges announce an "average" SAT score for their entering freshmen. Usually the college would like this "average" to be as high as possible. A NewYork Times article noted, "Private colleges that buy lots of top students with merit scholarships prefer the mean, while open-enrollment public instituions like medians." Use what you know about the behavior of means and medians to explain these differences.
If a data set has an even number of observations, the median
Does the mean represent the center of the data?
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