You want to find the average GPA at Adelphi, so you decide to perform a study. You went outside the UCand screamed at people going to lunch, "What's your GPA?" You copied down the first 50 people toanswer you.Survey of Statistics Lab Data1)Discuss the sampling technique(s) used. Do you feel that they could have been improved?Explain.1.042.034.141.052)Display the data in a histogram with the following intervals: 0-1, 1-2, 2-3, 3-4,4-s0.584.023.672.060.673)Calculate the mean, median, mode, and range for the study. Also calculate the variance and thesample standard deviation. (Use your calculator.)3.292.234)Construct a box and whisker piot of the data. What are the boundaries for the outliers?3.830.241.735) (a) is it appropriate to use a student's t distribution to compute a confidence interval for thepopulation mean ?2.533.752.654.983.63(b) Find a 95% confidence interval for" (Show all work and state formulas used.)4.03(c) What does the confidence interval mean in the context of this problem?0.572.161.061.780.49How large of a sample is needed if we wish to be 99% confident that the sample mean is within 25pts of the population mean score? For this problem, assume that we know that the populationstandard deviation σ is 1.5.0.034.223.213.671.617)Suppose that Adelphi boasts that it has an average GPA of 3.0. Perform a hypothesis testwith a level of significance of .05, and anethefHtHeerefeieriemeeefyou performed with 50 students is enough to refute this claim. Your final answer must be written infull sentences and reference the math that you performed. (You may assume that the populationstandard deviation ơ is 1.5.)e4, to see if the study4.140.424.313.624.144.092.161.680.993.760.290.85

Question
Asked May 15, 2019
92 views

Avarege GPA questions. Data  include.

You want to find the average GPA at Adelphi, so you decide to perform a study. You went outside the UC
and screamed at people going to lunch, "What's your GPA?" You copied down the first 50 people to
answer you.
Survey of Statistics Lab Data
1)
Discuss the sampling technique(s) used. Do you feel that they could have been improved?
Explain.
1.04
2.03
4.14
1.05
2)
Display the data in a histogram with the following intervals: 0-1, 1-2, 2-3, 3-4,4-s
0.58
4.02
3.67
2.06
0.67
3)
Calculate the mean, median, mode, and range for the study. Also calculate the variance and the
sample standard deviation. (Use your calculator.)
3.29
2.23
4)
Construct a box and whisker piot of the data. What are the boundaries for the outliers?
3.83
0.24
1.73
5) (a) is it appropriate to use a student's t distribution to compute a confidence interval for the
population mean ?
2.53
3.75
2.65
4.98
3.63
(b) Find a 95% confidence interval for
" (Show all work and state formulas used.)
4.03
(c) What does the confidence interval mean in the context of this problem?
0.57
2.16
1.06
1.78
0.49
How large of a sample is needed if we wish to be 99% confident that the sample mean is within 25
pts of the population mean score? For this problem, assume that we know that the population
standard deviation σ is 1.5.
0.03
4.22
3.21
3.67
1.61
7)
Suppose that Adelphi boasts that it has an average GPA of 3.0. Perform a hypothesis test
with a level of significance of .05, and anethefHtHeerefeieriemeeef
you performed with 50 students is enough to refute this claim. Your final answer must be written in
full sentences and reference the math that you performed. (You may assume that the population
standard deviation ơ is 1.5.)
e4, to see if the study
4.14
0.42
4.31
3.62
4.14
4.09
2.16
1.68
0.99
3.76
0.29
0.85
help_outline

Image Transcriptionclose

You want to find the average GPA at Adelphi, so you decide to perform a study. You went outside the UC and screamed at people going to lunch, "What's your GPA?" You copied down the first 50 people to answer you. Survey of Statistics Lab Data 1) Discuss the sampling technique(s) used. Do you feel that they could have been improved? Explain. 1.04 2.03 4.14 1.05 2) Display the data in a histogram with the following intervals: 0-1, 1-2, 2-3, 3-4,4-s 0.58 4.02 3.67 2.06 0.67 3) Calculate the mean, median, mode, and range for the study. Also calculate the variance and the sample standard deviation. (Use your calculator.) 3.29 2.23 4) Construct a box and whisker piot of the data. What are the boundaries for the outliers? 3.83 0.24 1.73 5) (a) is it appropriate to use a student's t distribution to compute a confidence interval for the population mean ? 2.53 3.75 2.65 4.98 3.63 (b) Find a 95% confidence interval for " (Show all work and state formulas used.) 4.03 (c) What does the confidence interval mean in the context of this problem? 0.57 2.16 1.06 1.78 0.49 How large of a sample is needed if we wish to be 99% confident that the sample mean is within 25 pts of the population mean score? For this problem, assume that we know that the population standard deviation σ is 1.5. 0.03 4.22 3.21 3.67 1.61 7) Suppose that Adelphi boasts that it has an average GPA of 3.0. Perform a hypothesis test with a level of significance of .05, and anethefHtHeerefeieriemeeef you performed with 50 students is enough to refute this claim. Your final answer must be written in full sentences and reference the math that you performed. (You may assume that the population standard deviation ơ is 1.5.) e4, to see if the study 4.14 0.42 4.31 3.62 4.14 4.09 2.16 1.68 0.99 3.76 0.29 0.85

fullscreen
check_circle

Expert Answer

Step 1

Note: Since we are entitled to answer up to 3 sub-parts, we’ll answer the first 3 as you have not mentioned the subparts you need help with. Please resubmit the question and specify the other subparts you’d like to get answered.

In this question, we have a data of 50 people and based on that data we have to find some results given below:

Step 2

Part 1)

This seems to be a convenience nonprobability sampling because the researcher has done the sampling based on its own convenience, Researcher has selected the first 50 people only for its sampling.  

Step 3

Part B) 

The histogram...

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Math

Statistics

Related Statistics Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: The numbers of faculty at 32 randomly selected state-controlled colleges and universities with enrol...

A: Confidence interval:The (1-α) % confidence interval for population mean µ, when σ is known is given ...

question_answer

Q: A researcher says that 50% of the variance in blood pressure can be predicted from HR and that blood...

A: In this question we have the value of coefficient of determination which is equal to 0.50 and we hav...

question_answer

Q: Researchers conducted a study to determine whether magnets are effective in treating back pain. The ...

A: (a)To test whether the treatment is effective, the following null and alternative hypotheses are con...

question_answer

Q: A simple random sample of n=23 professors at a local community college have a mean course evaluation...

A: Solution:Null and alternative hypotheses:Null hypothesis: µ = 4Alternative hypothesis: µ ≠ 4Test sta...

question_answer

Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and...

A: Let r denote the linear correlation between advertising cost (x) and profit (y). The hypotheses are ...

question_answer

Q: (c) Explain why four students coming in late would not necessarily form a random sample. (Select all...

A: (c)A random sample represents the whole population properly.It can happen that some students will be...

question_answer

Q: The Toylot company makes an electric train with a motor that it claims will draw an average of only ...

A: The provided information are:

question_answer

Q: M Asigmnt Ose ook St hx Ch S g The D x4 ttp/ww.asignnet/wbudentsignment-Responses/subithdep-21213790...

A: Box and whisker plot:A type of graph used to display patterns of quantitative data is called a boxpl...

question_answer

Q: The president of Doerman Distributors, Inc., believes that 27% of the firm's orders come from first-...

A: In this question, it has been given that president of Doerman distributors believes 27% of the its f...