Tagged Questions

Minitab refers to a commercial statistical package distributed by Minitab Inc..

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0
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1answer
38 views

Probability of Event in Logistic Regression

I've a binary response (1 = event happen, 0 = otherwise) and 8 continuous predictors plus 1 categorical. Fitting in Minitab with a Binary Logistic Regression give me this output: ...
1
vote
0answers
29 views

R-squared adj. in multiple linear regression of 75% = high correlation?

I have a response column and a column of categorical predictors (around 25 categories) and I get with minitab linear regression analysis a R-sqr adjusted of 75%. ...
0
votes
1answer
46 views

Outliers In Predicted Intervals

In my stats class today, the professor was showing us some output from MINITAB on a prediction interval that was calculated (from time series data). For one of the prediction intervals, MINITAB had an ...
3
votes
4answers
529 views

How useful is Minitab in the real world? [closed]

I am currently a statistics student within a very good program. We use Minitab for a variety of items/classes. But, as my undergrad taught me, what you use in school isn't necessarily what is used in ...
1
vote
1answer
57 views

KS test - R, Minitab (and Systat)

I'm trying to figure out how Kolmogorov-Smirnov one-sample testing for normality is done in Minitab (or Systat, since the answers apparently match). If this is my data vector: ...
1
vote
0answers
41 views

How to run regression on a Taguchi design?

I'm trying to run a regression analysis on a Taguchi design. I have five categorical control factors, one of them with two levels and the other four with three levels. I want to generate a regression ...
1
vote
0answers
14 views

What is the best analysis to perform on brute force tests?

Basically, I have run a network simulation for video streaming a number of times. I have assigned weights to particular performance metrics of the network measuring their performance each time. ...
-10
votes
1answer
202 views

How do I add this P-value to normal probability plot in Minitab? [closed]

I go to Stat from main menu then Regression -> Regression... Although I have selected almost everything I cannot plot the extra info (p-value, mean, N, etc ) above in circle. I use Minitab 16.2.0.
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0answers
40 views

Regression with repeated measures in minitab

I do not have a strong statistics background, and I am trying to figure out the best way to determine whether a correlation exists between two variables $x$ and $y$ using Minitab. I have repeated ...
0
votes
1answer
116 views

Multiple Regression: Variation Explained

I'm stuck on a homework problem and I'm hoping you all might be able to help me out. I'd be very appreciative! We were given this data set: Data. I ran a regression in Minitab with GPA as the ...
0
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0answers
27 views

How can I statistically compare two time-series? [duplicate]

I have two time-series. Data have been logged over time for two different objects. Is there a significance test, applicable in SPSS or Minitab, that can be used to determine whether there is a ...
0
votes
0answers
33 views

Calculating estimator of the variance of sample mean

Assuming equal variances determine the value of the best estimator of the variance of sample mean 1 From my exhibit/minitab I have Sample 1: N = 1, Mean = 123.7, StDev = 19.8, SE Mean 5.5 T-Test of ...
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0answers
203 views

Model estimation procedure using backward elimination

I have run a multiple linear model using Minitab. The result showed that all variables are not significant. So, I use backward elimination. Lastly, I found that ...
0
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0answers
140 views

Error implemented a specific factorial design in Minitab (default generators)

I'm intending to implement the following factorial design I wish to obtain this alias structure - with a 2^(5-2) factorial design. ...
1
vote
1answer
359 views

Problem with response optimization with three variables using Response Surface in Minitab

I'm intending to do a response optimization of one response, $y$, having three predictor variables, $x_1$, $x_2$, and $x_3$. These variables are coded in the following manner: ...
0
votes
0answers
70 views

Problem with factorial design in Minitab

I'm having a problem with a factorial design in Minitab, as it is not as clear how to proceed as all problems I've had thus far. The problem is to create a factorial design with two factors where the ...
3
votes
1answer
384 views

How to generate random data that conforms to a given mean and upper / lower endpoints?

I'm in need of generating a set of random numbers (between 100 and 300 would suffice), which conform to a given mean, and also fall within certain upper and lower endpoints. Using the statistics ...
0
votes
1answer
786 views

How can I find the coefficient of correlation between ordered residuals and their expected values under normality?

As the question says I have to find the coefficient of correlation between ordered residuals and expected values under normality in Minitab. How can I do so? I have just started using Minitab and am a ...
1
vote
0answers
283 views

Different Parameter Estimates of SAS and Minitab for Unreplicated Factorial Designs

I am using famous example from Myers and Montgomery (1995), which is $2^{4}$ factorial design to compare some methods for unreplicated factorial designs concerning active effects and mean squared ...
2
votes
0answers
82 views

Estimate values below the limit of detection from a left-censored dataset

I have 32/180 determinations of a laboratory marker below the limit of detection (LOD) and would like to estimate them by maximum likelihood estimation. By using Minitab's reliability / survival ...
1
vote
1answer
322 views

Why do Minitab and SPSS give opposite results in Ordinal Logistic Regression?

I run an ordinal logistic regression model using both SPSS and Minitab. The dataset is exactly the same. The results are exactly the same, but in opposite directions. I have not manipulated default ...
2
votes
4answers
343 views

Stat test to compare two sets of binomial data

I am doing my undergraduate project and have tested a drug on cells for a responce. The data I have collected shows that the cells either produced a responce, or they did not. Binomial data? ...
2
votes
1answer
264 views

Bootstrap USL/LSL for non-normal data

This is new statistics space for me, so please excuse my ignorance. I have some data (N=180) that isn't normally distributed (verified in Minitab, P<0.005) and I want to use the data to get a +/- ...
0
votes
1answer
331 views

How to perform two-sample t-test with Minitab?

I am trying to do a few tests in Minitab and I don't understand why they are not working out. First, my data in minitab has several columns: ...
4
votes
1answer
333 views

Comparing minitab output to R

I am trying to recreate analysis of diamond data in R and compare it to minitab output cited in http://www.amstat.org/publications/jse/v9n2/datasets.chu.html I'm almost certain its the same data set ...
2
votes
0answers
264 views

How to fix the constant variance assumption?

We have a project where we have to find the best model using a large set of data. In our current model there are 10 variables, some quantitative, and a few that are qualitative. When we first do ...
1
vote
1answer
724 views

Unit-root test in Minitab

I've read that Minitab does not perform the Augmented Dickey-Fuller test; I can't find it myself. Is there an alternative function in the package that will run a unit-root test?
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0answers
109 views

ARIMA Forecast Restrictions

Is it possible to fit an ARIMA under a restriction that bounds the minimum to positive values? I'm using Minitab.
2
votes
1answer
239 views

Tips for rejected Ljung-Box stats? Can Minitab model ARIMAX?

Two questions: What are some basic tips on going back to the drawing-board after a seasonal ARIMA fit shows significant coefficients (1,0,0)x(0,1,0) but fails in its Ljung-Box stats? Can minitab ...
3
votes
1answer
987 views

How do I estimate and interpret a forecast made by Minitab?

From 43 years of monthly stream flow data, I want to get 11 years ARIMA future forecast using Minitab 15 statistical Software. The difficulty is the procedure to be followed, interpretation of model ...
3
votes
0answers
2k views

How to properly analyze: 4-way ANOVA?

I have a dissertation research question which involves what I am thinking is appropriately analyzed using 4-way ANOVA. The dependent variable is a math anxiety score (uses 5-point Likert scale). The ...
1
vote
1answer
256 views

Solution for error message in minitab [closed]

I have used minitab software to fit time series model and predict. For some models I got the following error message; "Fitted model may be nonstationary or noninvertible. Completion of computation ...
1
vote
2answers
2k views

Statistical Significant Difference between 5 groups of data

I'm trying to compare 5 different gears used by fishermen and the amount of bycatch found in each. The values have a unit of "% of time encountered" and range between 0% (ie: never have bycatch) and ...
3
votes
1answer
457 views

Software for learning statistical quality control

I'm taking a course in Statistical Quality Control as an elective in my masters program. We're using Montgomery's Introduction to Statistical Quality Control, 6th Edition. The book uses minitab ...
1
vote
1answer
3k views

Problem with ARIMA in Minitab

I have made non-stationary data stationary by differencing at lag 1 and then differencing the differences at lag 11. The data values for months 1/06 through 6/11 are in an Excel file at ...