Homework Answers
For the given data,
If we want to assess whether there is a relationship between Band type and Instrument type, then we use chi-square test of independence.
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Question 13 (1 point) High School Band - In most US high schools, students can play...
Question 10 (1 point) High School Band ~ In most US high schools, students can play...
Question 10 (1 point) High School Band ~ In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Instrument type Band type Concert Jazz Marching Woodwind 31 10 65 Brass 25 16 53 Percussion 8 10 27 To assess whether there is a relationship between band type and instrument type, we conduct an appropriate hypothesis test....
High School Band ~ In most US high schools, students can play an instrument in three...
High School Band ~ In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Band type Instrument type Woodwind Brass Percussion Concert 31 25 8 Jazz 10 16 10 Marching 65 64 27 To assess whether there is a relationship between band type and instrument type, we conduct an appropriate hypothesis test. Note: Observed counts are...
The Marcus High School Marching Band has approximately 300 students. The band director stated that the...
The Marcus High School Marching Band has approximately 300 students. The band director stated that the average band member spends 6 hours of practice time each week. 120 band members were polled and asked how much they practiced. The mean was 5.8 hrs and the standard deviation was 2. The standard deviation of 2 came from the sample of 120 band members. The level of significance was 0.05. What is the critical value and test statistic? What is the appropriate...
1. Independent random samples of students were taken from two high schools, R and S, and...
1. Independent random samples of students were taken from two high schools, R and S, and the proportion of students who drive to school in each sample was recorded. The difference between the two sample proportions (R minus S) was 0.07. Under the assumption that all conditions for inference were met, a hypothesis test was conducted where the alternative hypothesis was the population proportion of students who drive to school for R was greater than that for S. The p-value...
Independent random samples of students were taken from two high schools, R and S, and the...
Independent random samples of students were taken from two high schools, R and S, and the proportion of students who drive to school in each sample was recorded. The difference between the two sample proportions (R minus S) was 0.07. Under the assumption that all conditions for inference were met, a hypothesis test was conducted where the alternative hypothesis was the population proportion of students who drive to school for R was greater than that for S. The p-value of...
8) Two high schools have a similar number of students and parking lots of similar size....
8) Two high schools have a similar number of students and parking lots of similar size. The safety officers at both schools want to investigate whether there is an average difference in the number of cars parked per day in the student parking lots for the school year. A random sample of 15 school days will be selected. For each selected day, the number of cars parked in the student parking lots will be counted at both schools and the...
You are interested in comparing SAT scores between high school students from public vs. private schools....
You are interested in comparing SAT scores between high school students from public vs. private schools. You have collected data from a sample of high school students from public and private schools and asked them to complete a survey that measures their SAT scores. The level of measurement for the SAT scores variable is ratio. What type of test can be used to analyze the data in order to compare the scores between public and private school students? a) independent...
U.S. schools face an ongoing challenge: as students get closer to high school graduation, their enthusiasm...
U.S. schools face an ongoing challenge: as students get closer to high school graduation, their enthusiasm for school falls. A Gallup poll in June 2017 has discovered that fifth graders are most engaged with school, while 11th graders are least. The latest Gallup poll showed that only 32% of 11th graders are engaged in school. Assume this value represents the population proportion. Suppose we randomly sample 150 11th graders in the U.S. and ask them their engagement in school. ?...
12. A survey conducted at Chicago Public Schools (CPS) involving high school students on whether they...
12. A survey conducted at Chicago Public Schools (CPS) involving high school students on whether they had participated in binged drinking during the past month. Binge drinking was defined as 5 or more drinks in a row on one or more of the past 30 days. Number who identified as having participated in Binge Drinking. 73 Total participants 571 a. From the sample data is there evidence that the proportion of students who participate in binge drinking is greater than...
A researcher wants to determine whether high school students who attend an SAT preparation course score...
A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than students who do not attend the preparation course. For those who do not attend the course, the population mean is 1050 (? = 1050). The 16 students who attend the preparation course average 1200on the SAT, with a sample standard deviation of 100. On the basis of these data, can the researcher conclude that the preparation course has...
Question 10 (1 point) High School Band ~ In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Instrument type Band type Concert Jazz Marching Woodwind 31 10 65 Brass 25 16 53 Percussion 8 10 27 To assess whether there is a relationship between band type and instrument type, we conduct an appropriate hypothesis test....
8) Two high schools have a similar number of students and parking lots of similar size. The safety officers at both schools want to investigate whether there is an average difference in the number of cars parked per day in the student parking lots for the school year. A random sample of 15 school days will be selected. For each selected day, the number of cars parked in the student parking lots will be counted at both schools and the...
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