Homework Answers
Parameter is a measurable characteristic of a population, such as a mean or a standard deviation, whereas Statistic is a measurable characteristic of a sample.
A population includes all of the elements from a set of data and a sample consists one or more observations drawn from the population.
In this study, the population is all Western University students, and 50 students interviewed are the sample. The mean travel time (of the sample of 50 student) of 16.7 hence would be statistic.
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A researcher is interested in the travel time of Western University students to the campus. A...
A researcher is curious about the IQ of students at Western University. The entire group of...
A researcher is curious about the IQ of students at Western University. The entire group of students is an example of a 1) pari 0 2) statistic 3 ) population 4) sample
Rudy Researcher is interested in the drinking habits of students at the University of Alabama. It is...
Rudy Researcher is interested in the drinking habits of students at the University of Alabama. It is known that the average yearly consumptions of soft drinks by college students nationwide is 52 gallons with a standard deviation of 3.5 gallons. Rudy then samples 50 students at the university and finds a sample mean of 53.2 gallons. Rudy is interested in determining how rare this sample is, given the nationwide average is 52 gallons. What is the probability of Rudy collecting a...
1. A survey will be given to 50 students randomly selected from the freshmen class at...
1. A survey will be given to 50 students randomly selected from the freshmen class at UOWD A) The 50 students B) All students at UOWD C) All freshmen at UOWD D) All students at the UK universities. 2. Researchers are concerned that the average age of a certain type of a bird is decreasing implying, among other things, that more environmental measures should be taken. If X is the age of the birds sampled in a nationwide study, then...
0 pts A large Midwestern university is interested in estimating the mean time that students spend...
0 pts A large Midwestern university is interested in estimating the mean time that students spend at the student recreation center per week. A previous study indicated that the standard deviation in time is about 25 minutes per week. If the officials wish to estimate the mean time within ± 4 minutes with a 90 percent confidence, what should the sample size be? 106 Can't be determined without the sample mean. 105 105.685
questions 1 through 5 PROBLEMS *1. A researcher is interested in the texting habits of high...
questions 1 through 5
PROBLEMS *1. A researcher is interested in the texting habits of high school students in the United States. The researcher selects a group of 100 students, measures the number of text messages that each individual sends each day, and calculates the average number for the group. a. Identify the population for this study. b. Identify the sample for this study. c. The average number that the researcher calculated is an example of a - 2. Define...
1. A university researcher is interested in whether efforts to recruit more top high school students...
1. A university researcher is interested in whether efforts to recruit more top high school students have been successful. To test this, she randomly selects 50 freshmen from the university and records their high school GPA. The mean is 2.75 with a standard deviation of 0.50. The researcher also knows that the mean high school GPA of all freshmen enrolled at the university five years ago was 3.00 with a standard deviation of 0.66. The researcher wants to know if...
Rudy Researcher is interested in conducting a study regarding the drink preferences of the students on...
Rudy Researcher is interested in conducting a study regarding the drink preferences of the students on the University of Alabama campus. He believes that if a student on campus drinks mostly water, that they will receive higher grades than other individuals that drink either soda or coffee. In running the study, Rudy will place students into groups and have them drink water, soda or coffee for 2 weeks, then look at their score on an exam of out 100 points. a. What...
help Solve the problem. A large university is interested in learning about the average time it...
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Solve the problem. A large university is interested in learning about the average time it takes students to drive to c amount of time they spent traveling to campus. The sample results found that the sample me as 23.243 minutes and the sample standard deviation was 20.40 minutes Find the rejection region for determining if the population standard deviation exceeds 20 m. ause a-0.05 university sampled 51 students and asked each to provide the O Reject Ho if x2...
A book about different colleges' reports that the mean time students at a particular university study...
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
A researcher is interested in finding a 95% confidence interval for the mean number minutes students...
A researcher is interested in finding a 95% confidence interval for the mean number minutes students are concentrating on their professor during a one hour statistics lecture. The study included 96 students who averaged 37.1 minutes concentrating on their professor during the hour lecture. The standard deviation was 13.6 minutes. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a distribution. b. With 95% confidence the population mean minutes of concentration is between and...
A researcher is curious about the IQ of students at Western University. The entire group of students is an example of a 1) pari 0 2) statistic 3 ) population 4) sample
questions 1 through 5
PROBLEMS *1. A researcher is interested in the texting habits of high school students in the United States. The researcher selects a group of 100 students, measures the number of text messages that each individual sends each day, and calculates the average number for the group. a. Identify the population for this study. b. Identify the sample for this study. c. The average number that the researcher calculated is an example of a - 2. Define...
help
Solve the problem. A large university is interested in learning about the average time it takes students to drive to c amount of time they spent traveling to campus. The sample results found that the sample me as 23.243 minutes and the sample standard deviation was 20.40 minutes Find the rejection region for determining if the population standard deviation exceeds 20 m. ause a-0.05 university sampled 51 students and asked each to provide the O Reject Ho if x2...
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
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