The authors of the paper "Fudging the Numbers: Distributing Chocolate Influences Student Evaluations of an Undergraduate Course"† carried out a study to see if events unrelated to an undergraduate...

Using the ratio-to-moving-average method: Determine the 4 quarter index, Interpret the quarterly pattern of enrolment, Compute the trend equation and forecast. The enrollment in the School of...

1)   A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is the degrees...

Year : 1930,1931,1932,1933,1934,1935,1936,1937,1938 price of wheat : 4,5,6,7,8,9,10,11

A study was conducted to evaluate the effect of calcium supplement on preventing postmenopausal osteoporosis. Among 300 women aged 60 and above who took calcium supplements regularly, 15% had postmenopausal...

A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of rooms. Carpeted: 15...

100 people in New York and 100 people from Chicago, were each asked "do you like your own cities style of pizza better than the other one?" The number of people that said yes in new...

Q1 A liquid phase reaction: A → 2R was performed in two different reactors and the following results were obtained in repeated experiments: Reactor 1: Conversion of A (in %): 57.2, 53...

For their class project, a group of statistics students decide to survey the student body to assess opinions about the proposed new student center. Their sample of 200 contained 50 first-year students,...

The mean test score was 850 with a standard deviation of 100.  What porportion of students had a higher score than Vivian? (Assume that test scores are normally distributed.)