Question

Janine intends use collect a stratified sample of 40 girls to interview. group A B C...

Janine intends use collect a stratified sample of 40 girls to interview. group A B C D TOTAL number of girls

   38 30 18 40 126

Calculate the number of girls from each group that should be in the sample?

Homework Answers

Answer #1

In stratified random sampling, the population is divided into different groups. units are selected from each of these group with the help of simple random sampling.

In this case, there are four strata namely a, b, c, and d

the total sample size is 40 girls to be interviewed. The total number of units for all the strata are 126. This indicates that approximately 32% of the total units in all the strata should be included in the sample.

A B C D TOTAL
ni 38 30 18 40 126
32%*ni 12.16 9.6 5.76 12.8

this indicates that 12 units from group A, 9 units from group B, 6 units from Group C, and 13 units from group D should be selected. The sum to a total of 40 units in the sample

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Quota sampling: Select one: a. involves taking a stratified sample in which the number of sampling...
Quota sampling: Select one: a. involves taking a stratified sample in which the number of sampling units drawn from each stratum is in proportion to the relative population size of that stratum b. ensures that certain characteristics of a population sample will be represented to the exact extent that the researcher desires. c. obtains units or people who are most conveniently available. d. selects an initial starting point by a random process, and then selects every nth number on the...
The purpose of an "experiment" is to describe some group or situation a. TRUE b. FALSE...
The purpose of an "experiment" is to describe some group or situation a. TRUE b. FALSE A sample that is collected from whatever data happens to quick and easy to get. a. Voluntary response b. Stratified c. Convenience d. Systematic The property of samples in which the sample statistic being measured varies from sample to sample a. precision b. SRS c. Randomness d. Sampling variability The entire group of objects which contain some characteristic of interest in a study a....
(b)A host on a cruise ship wants to collect data on the time passengers spend at...
(b)A host on a cruise ship wants to collect data on the time passengers spend at various activities on board. Which of the following best describes a stratified sample of passengers? The host assigns each passenger a different number. Using a random number table, he draws 50 of those numbers at random. Then, he selects the passengers assigned to the drawn numbers. Every set of 50 passengers is equally likely to be drawn using the random number table. The host...
A. Systematic Sample B. Simple Random Sample C. Convenience Sample D. Multi-Stage Sample E. Stratified Sample...
A. Systematic Sample B. Simple Random Sample C. Convenience Sample D. Multi-Stage Sample E. Stratified Sample F. Cluster Sample 1. Among your friends who took the exam, select 4 of them completely at random.   2. Obtain an alphabetical list of all students who took the exam. Starting with the 6th student on the list, survey every 14th student.   3. Randomly choose 4 of the 14 sections, and survey every student from those 4 sections.   4. Choose a set of 42...
Feel free to use Minitab or Excel on all aspects of this. a) Collect a sample...
Feel free to use Minitab or Excel on all aspects of this. a) Collect a sample of n=50 data values for which you can observe some variation. Describe the source of the data, that is, how did you get it? (If all the data are the same with no variation, you aren’t measuring carefully enough). b) Make a histogram of your 50 data values, and comment on the location, spread and shape. c) Calculate the mean and standard deviation of...
The nonprofit group Public Agenda conducted telephone interviews with a stratified sample of parents of high...
The nonprofit group Public Agenda conducted telephone interviews with a stratified sample of parents of high school children. There were 202 black parent, 202 Hispanic parents, and 201 white parents. ONe question asked was, “Are the high schools in your state doing an excellent, good, fair, or poor job, or you don’t know enough to say?” Here are the survey results: Black Hispanic White Total Excellent 12 34 22 68 Good 69 55 81 205 Fair 75 61 60 196...
A headhunter selects a sample of large companies and records the number of job openings at...
A headhunter selects a sample of large companies and records the number of job openings at each. The data is as follows: 20, 18, 34, 27, 38, 26, 41, 29, 19 a) Calculate the sample mean. b) Calculate the sample standard deviation. c) Find the mode(s). d) Find the 5 number summary. e) Calculate the IQR.
A sample of 100 students consists of 60 females and 40 males. The purpose of the...
A sample of 100 students consists of 60 females and 40 males. The purpose of the study is to determine if the sex of the student is related to passing or failing the first test. Out of the 100 students in the sample, 70 students passed. the expected number of males passing is: 70 40 28 12 10 points    QUESTION 10 An engineer who is studying the tensile strength of a steel alloy intended for use in golf club...
A partial relative frequency distribution is given. Class Relative Frequency A .22 b .18 C .40...
A partial relative frequency distribution is given. Class Relative Frequency A .22 b .18 C .40 d a. what is the relative frequency of class d? b. The total sample size is 200. what is the frequency of class d?
Identify the correct type of t-test to use in the following situations. Choose from a 1-sample,...
Identify the correct type of t-test to use in the following situations. Choose from a 1-sample, 2- sample, or matched pairs t-test. a) You interview 500 female students and ask each about the average number of minutes they spend using the internet each day. b) You interview a sample of 250 unmarried male students and 250 unmarried female students and ask each about the average number of minutes they spend using the internet each day. c) You interview 200 female...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT