3. At CSUF, a simple random sample of 100 entering graduate students in 2018 found that...
Consider the following two scenarios. A) take a simple random sample of 100 graduate students at X university and b) take a simple random sample of 100 graduate students studying Data Science. For each sample you record the amount spent on textbooks used for classes. Which sample do you expect to have the smaller standard deviation? Explain your answer.
Suppose that at a particular college, a random sample found that 25 out of 100 students who use the internet use Twitter. Does this provide evidence that the true proportion of students at this college who use Twitter is higher than the nationally stated 15%? Use a significance level of 0.05 and the p-value to give your decision. The correct hypotheses to use are: Ho: p = 0.15 HA: p > 0.15 Blank #1: Report the test statistic to two...
A student conducts a simple random sample of students from her high school and finds that 32 out of 100 students in her sample regularly walk to school. Give a point estimate for the proportion of all students at her high school who regularly walk to school.
10. A university is concerned about the proportion of students that graduate. To address the issue, it does the following. First, it gets a random sample of incoming students. Some of the students in this random sample will be required to have extra meetings with a series of advisors and some will not. It randomly decides which of the students will have this requirement and which will not. In the data, 464 of the 764 students that had this requirement...
1. When conducting a survey, it is important to use a random sample: to get a significant result. to avoid bias and to get a representative sample. so that we can make causal conclusions. to ensure truthful answers to the survey's questions. none of the above. 2. In order to obtain a sample of undergraduate students in the United States, a simple random sample of 10 states is selected. From each of the selected states, 10 colleges or universities are...
A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 458. It is know that the population standard deviation of all mathematics SAT scores is 116. a. What function would you use to create a confidence interval for the mean mathematics SAT score for the entering freshman class? b. Create a 99% confidence interval for the mean mathematics SAT score for the entering freshman class. Round to 2...
A college admissions officer takes a simple random sample of 100 entering freshmen and computes their mean mathematics SAT score to be 458. It is know that the population standard deviation of all mathematics SAT scores is 116. a. What function would you use to create a confidence interval for the mean mathematics SAT score for the entering freshman class? b. Create a 99% confidence interval for the mean mathematics SAT score for the entering freshman class. Round to 2...
in a simple random sample of 190 households, the sample mean number of personal computers was 2.78. assume the population standard deviation is 0.41. a) a 99.8% confidence interval for the mean number of personal computers is ----< mean <----- 2) a simple random sample of eight college freshman were asked about how many hours of sleep they typically got per night. the results were 7.5, 8, 6.5, 24, 8.5, 6.5, 7, 7.5 a) the data contains an outlier that...
In a simple random sample of 300 college students it is found that 42 of them smoke. What kind of confidence interval would we use in this situation? A)None of these. B) 1-Prop Z-Interval C) Z-Interval D)T-Interval
(1 pt) A random sample of n = 80 students found 40 with brown eyes. Give the numerical value of the statistic , the sample proportion who have brown eyes