A lecturer in a university wants to investigate the differences in students’ marks with the different majors from School A, School B, School C and School D for WSA1 subject. It was thought that students with four different majors might result in different grades for WSA1. The lecturer examined exam scores for a sample of four students each from the school that participated in the WSA1 class. The following are the WSA1 exam results for the students:

Nationally, 61% of American own American cars, 26% of Americans own Asian cars, and the remaing Americans own non-Asian foreign cars. A survey of 205 people in California finds that 54% own American cars, 31% own Asian cars, and the remaining own non-Asian foreign cars. When testing (at the 10% level of significance) whether the proportions in California are the same as the national proportions, what is the test statistic (please round your answer to 3 decimal places)

If a hurricane was headed your way, would you evacuate? The headline of a press release states, "Thirty-two Percent of People on High-Risk Coast Will Refuse Evacuation Order, Survey of Hurricane Preparedness Finds." This headline was based on a survey of 4,625 adults who live within 20 miles of the coast in high hurricane risk counties of eight southern states. In selecting the sample, care was taken to ensure that the sample would be representative of the population of coastal residents in these states. In USE SALT (a) Use this information to estimate the proportion of coastal residents who would evacuate using a 98% confidence interval. (Round your answers to three decimal places.) (b) Write a few sentences interpreting the interval and the confidence level associated with the interval. We are % confident that the proportion of all coastal residents who -Select-- v evacuate is within the confidence interval. If we were to take a large number of random samples of size 4,625, % of the…

There are 25 students in Mr. Williamson's statistics class. On a cold winter day in February, many of the students had runny noses and sore throats. After examining each student, the collage's health center found the following  r