In a school district with three middle schools, a random sample of 400 middle schoolers was selected andasked which sport they preferred. The results are recorded below.NorthCentralSouthBasketball Baseball Soccer Football172618312489733722306724Use a 5% level of significance to test whether the preferred sport is independent of the school attended.

Basketball Baseball Soccer Football North 89 17 26 18 Central 73 37 30 31 South 67 22 24 24…

Answered: In a school district with three middle…

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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please provide all values listed.
A researcher asks a sample of brothers and sisters to rate how positive their family environment was during their childhood. In this study, the differences in ratings between each brother and sister pair were compared. Type type of design described here would be _____ A. Repeated-measures design B. Matched-samples design C. Both
Are American men or women more into online dating? Researchers from a pop culture magazine conducted a study to see if there is a difference in the proportion of men and women under 30 that use online dating sites. They collected independent random samples of 96 women and 88 men, ranging from 18-30 years old, from across the US. Of the women, 67 reported using online dating sites, while 62 of the men reported using online dating sites. Assume the subjects responded honestly. What would be the test statistic and P-value for performing a hypothesis test Ho : P1 = P2 vs. HA : P1 + P2 ? Select one: O a. z =-0.098 ; P-value = 0.9204 O b. z =-1.13 ; P-value = 0.1292 O c. z =-3.77 ; P-value is approximately 0 O d. z =-0.098 ; P-value = 0.4602 O e. z =-1.13 ; P-value = 0.2594 Clear my choice
Which Is More Important: Grades, Sports, or Popularity?478 middle school (grades 4 to 6) students from three school districts in Michigan were asked whether good grades, athletic ability, or popularity was most important to them.1 The results are shown below, broken down by gender: Grades Sports Popular Boy 117 60 50 Girl 130 30 91 Do middle school boys and girls have different priorities regarding grades, sports, and popularity? Calculate a test statistic, find a p-value, and answer the question.1Chase, M. and Dummer, G., “The Role of Sports as a Social Determinant for Children,” Research Quarterly for Exercise and Sport, 1992; 63; 418-424. Calculate the chi-square statistic and the p-value.Round your answer for the chi-square statistic to one decimal place, and the p-value to four decimal places.χ2= ? p-value = ?
c. this test statistic for data = d. the p-value for this sample =
Which of the following biases occurs when various groups in a study are assessed differently for an outcome? OA. Selection OB. Reporting OC. Detection OD. Attrition
Difference tests are conducted to determine: A. the representative value in a given set of scores. B. whether two or more groups differ on an outcome. C. if the assumptions of a statistical procedure have been met. D. whether two variables correlate with each other.
To compare two elementary schools regarding teaching of reading skills, 12 sets of identical twins were used. In each case, one child was selected at random and sent to school A, and his or her twin was sent to school B. Near the end of fifth grade, an achievement test was given to each child. The results follow: Twin Pair 1 2 3 4 5 6 School A 80 145 118 90 112 118 School B 83 135 115 105 105 113 Twin Pair 7 8 9 10 11 12 School A 98 112 115 144 124 96 School B 93 87 98 132 135 105 Suppose a sign test for matched pairs with a 5% level of significance is used to test the hypothesis that the schools have the same effectiveness in teaching reading skills against the alternate hypothesis that the schools have different levels of effectiveness in teaching reading skills. Let p denote portion of positive signs when the scores of school B are subtracted from the corresponding scores of school A.…
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision, the council asked the chief of police to survey other cities of similar size to determine the relationship between the number of police and the number of crimes reported. The chief gathered the following sample information. City Oxford Starksville Danville Athens ……….... Police 23 24 30 33 Number of Crimes 18 15 Click here for the Excel Data File 9 11 Number of crimes City Holgate Carey Whistler Woodville > Answer is complete but not entirely correct. 40.6081 X (90.0408) ► x Answer is complete and correct. 19✔ Police 24 20 19 27 a. Determine the regression equation. (Negative amounts should be indicated by a minus sign. Round your answers to 4 decimal places.) Number of Crimes 9 22 24 10 b. Estimate the number of crimes for a city with 21 police officers. (Round your answer to the nearest whole number.)
A sample survey by Comcast asked a random sample of customers about use of the Internet and about the type of community they lived in. Here are the results: Internet Users: Rural: 433 Suburban: 1072 Urban: 536 Nonusers: Rural: 463 Suburban: 627 Urban: 388 Is there a relationship between Internet use and community type? Give statistical evidence to support your findings.
Please help. I dont understand
Data were gathered on how high dolphins jump from the surface of the water based on body length. The following data was obtained from 10 randomly selected dolphins in Miami, Florida. Body Length (in feet) Height of Jump (in feet) 5.5 15 6 15 6.7 17.5 7.2 17 7.5 18.1 8.2 18.7 8.2 17.6 8.5 19.2 9 22.3 9.5 19.3 What is the value of r and its interpretation?

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