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11. A Biology instructor is wondering about the average amount of time a student spent studying...
10. A veterinarian is curious about the average length of her canine patients' tails. She uses...
10. A veterinarian is curious about the average length of her canine patients' tails. She uses the next 18 dogs that come into her clinic as a sample and finds that the mean tail length in the sample is 9.1 in. Previous large-scale studies have indicated that the standard deviation for the lengths of dogs' tails is about 2.2 and that the tail lengths are normally distributed. Construct a 90% confidence interval for the mean length of this vet's dogs'...
Are the grades one receives in a course related to the amount of time spent studying...
Are the grades one receives in a course related to the amount of
time spent studying the subject? To analyze this possibility, a
student took a random sample of 60 students who had enrolled in an
accounting class last semester. She asked each student to report
his or her grade in the course and the total number of hours spent
studying accounting. The data are stored in this Excel file (SEE
DATA BELOW)
Question 4. How many points would a...
1) A professor knows that in the past, the average amount of time spent studying the...
1) A professor knows that in the past, the average amount of time spent studying the night before the first exam was 140 minutes with a normal distribution and a standard deviation of 75.1. The professor finds that the average amount of time spent studying the night before the first exam for the current class of 40 students is 165 minutes. a) Please identify the following values from the above study description. The population mean (ยต) equals ________________. The population...
You are doing a study to determine the impact of time spent studying on exam grades...
You are doing a study to determine the impact of time spent studying on exam grades in one of your biology classes. You are comparing exam grades of students that did not study at all, students that studied for 1-5 hours, 6-10 hours, or 10 or more hours. Use this information to answer the following questions. What is your dependent variable? There is only one answer Number of students Time spent studying Exam grades What is the factor being assessed?...
Question 13 4 pts Assume the amount of time statistics students spent studying for the Math...
Question 13 4 pts Assume the amount of time statistics students spent studying for the Math 10 final exam is exponentially distributed with a mean of 4.2 hours. The probability that a student studied between 3 and 5 hours is O 0.4762 O 0.3789 O 0.1855 O 0.6211 Question 14 4 pts In October 2003 the mean sale price of a single family home in Santa Clara County was $683,008. We are interested in determining whether the prices in Cupertino...
4. The time spent studying for an exam and the result of the exam for a...
4. The time spent studying for an exam and the result of the exam for a random sample of 8 students in an elementary statistics course are shown below. Time (hours) 5 7 5 6 7 10 5 8 Exam's Score 70 80 75 78 75 99 85 90 (a) (6 points) Find the equation of the regression line. Round answers to a whole number. (b) (5 points) Predict the exam's score for a student who studied 6 hours assum-...
A researcher wished to compare the average amount of time spent in extracurricular activities by high...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
1. To determine the average number of hours spent studying by college students per week, a...
1. To determine the average number of hours spent studying by college students per week, a sample of 39 students was randomly selected, and found to spend an average of 17.1 hours per week, with a standard deviation of 4.3 hours. Find the 90% confidence interval for the mean number of hours spent studying per week by all college students. What is the upper and lower bound? 2. If I asked a random student how many hours they study per...
A graduate student believed that, on the average, college students spend more time on the Internet...
A graduate student believed that, on the average, college students spend more time on the Internet compared to the rest of the population. She conducted a study to determine if her hypothesis was correct. The student randomly surveyed 25 students and found that the average amount of time spent on the Internet was 8.75 hours per week with a SD = 3 hours. The last census found that, on the average, people spent 11 hour per week on the Internet....
An inexperienced on-line instructor would like to estimate the mean time that it takes her students...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? 2.34.726 <u...
10. A veterinarian is curious about the average length of her canine patients' tails. She uses the next 18 dogs that come into her clinic as a sample and finds that the mean tail length in the sample is 9.1 in. Previous large-scale studies have indicated that the standard deviation for the lengths of dogs' tails is about 2.2 and that the tail lengths are normally distributed. Construct a 90% confidence interval for the mean length of this vet's dogs'...
Are the grades one receives in a course related to the amount of
time spent studying the subject? To analyze this possibility, a
student took a random sample of 60 students who had enrolled in an
accounting class last semester. She asked each student to report
his or her grade in the course and the total number of hours spent
studying accounting. The data are stored in this Excel file (SEE
DATA BELOW)
Question 4. How many points would a...
Question 13 4 pts Assume the amount of time statistics students spent studying for the Math 10 final exam is exponentially distributed with a mean of 4.2 hours. The probability that a student studied between 3 and 5 hours is O 0.4762 O 0.3789 O 0.1855 O 0.6211 Question 14 4 pts In October 2003 the mean sale price of a single family home in Santa Clara County was $683,008. We are interested in determining whether the prices in Cupertino...
4. The time spent studying for an exam and the result of the exam for a random sample of 8 students in an elementary statistics course are shown below. Time (hours) 5 7 5 6 7 10 5 8 Exam's Score 70 80 75 78 75 99 85 90 (a) (6 points) Find the equation of the regression line. Round answers to a whole number. (b) (5 points) Predict the exam's score for a student who studied 6 hours assum-...
A researcher wished to compare the average amount of time spent in extracurricular activities by high school students in a suburban school district with that in a school district of a large city. The researcher obtained a simple random sample of 60 high school students in a large suburban school district and found the mean time spent in extracurricular activities per week to be 6 hours with a standard deviation of 3 hours. The researcher also obtained an independent simple...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? 2.34.726 <u...
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