A recent study focused on the number of times people 18 to 25 years old and 25to 35 years old send a Twitter message in a day. The sample information issummarized here.Age18 to 2525 to 35Sample Size Sample Mean25233028At the 0.01 significance level, we ask if there is a difference in the mean numberof times people 18 to 25 years old and 25 to 35 years old send a Twittermessage in a day. What is the test statistic for this hypothesis?Multiple Choice2-statistict-statisticp-statisticPopulation StandardDeviation510df-statistic

Two sample z test: A hypothesis test which is used to determine the significance of the two…

Answered: A recent study focused on the number of…

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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Listed below are foot lengths in inches for 11 randomly selected people taken in 1988. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are the statistics representative of the current population of all people? 9.9 10.5 9 9.2 8.9 9.2 8.8 8.9 9.1 9.2 9.9 The range of the sample data is (Type an integer or a decimal. Do no people² inches. inches people.
calculate the standard deviation for the following sample data 2,4,5,5,7,8,9,10,11,12
A sample consists of the following N scores 1,9,8,5,7 calculate the standard deviation
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A credit score is a numerical value between 300 and 850 that measures a person's creditworthiness. Summary statistics and graphical display of credit scores for randomly selected 40 - 59 years old individuals from Texas, Pennsylvania, California, and Florida are shown below. Does average credit score differ by state? Statistics TX PA CA FL FL Sample Size 36 36 36 36 CA Mean 671.7 730.3 710.1 704.8 PA Standard Deviation 42.7 45.6 33.4 38.1 TX 550 600 650 . 1. The above charts show that on average, for this sample, credit scores in ...... 700 750 800 TX PA CA FL (choose one) tend to be lowest, and credit scores in TX PA CA FL (choose one) tend to be highest. 2. Formulate the appropriate hypotheses: Ho: Average credit score differs does not differ (choose one) by state. Ha: Average credit score differs does not differ (choose one) by state. 3. The distributions of the credit scores show quite a bit of variability. Should we be concerned when applying the ANOVA procedure? Why or why not?…
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Based on the data below, answer the following question: What is the mean of Local Tuition (keep 1 decimal place)? What is the mean of Foreign Tuition? (Keep 1 decimal place.) What is the sample standard deviations of the variable Local Tuition? Business School Full-Time Enrollment Students per Faculty Local Tuition ($) Foreign Tuitiion ($) English Test Work Experience Starting Salary ($) 1 Melbourne Business School 200 5 24,420 29,600 No Yes 71,400 2 University of New South Wales (Sydney) 228 4 19,993 32,582 No Yes 65,200 3 Indian Institute of Management (Ahmedabad) 392 5 4,300 4,300 No No 7,100 4 Chinese University of Hong Kong 90 5 11,140 11,140 No No 31,000 5 International University of Japan (Niigata) 126 4 33,060 33,060 Yes No 87,000 6 Asian Institute of Management (Manila) 389 5 7,562 9,000 No Yes 22,800 7 Indian Institute of Management (Bangalore) 380 5 3,935 16,000 No No 7,500 8 National University of Singapore 147 6 6,146 7,170 Yes Yes 43,300 9…
Listed below are the amounts (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are there any outliers, and are they likely to have much of an effect on the measures of variation? 3750505565859017019521925035040017503000
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A recent study focused on the number of times people 18 to 25 years old and 25 to 35 years old send a Twitter message in a day. The sample information is summarized here. Age 18 to 25 25 to 35 Sample Size Sample Mean 25 23 30 28 Population Standard Deviation 5 10