I'm new to SPSS and also new to this forum, I have a statistical project to handle soon and I'm trying to do my best to achieve the most I can in these few days.

What does it mean, roughly speaking to "ensure the data are suitable for an analysis? which of the options from the "Analyze" I have to consider and then go through?

Any help will be extremely appreciated!!

thank you in advance!]]>

let me briefly anticipate that I am a total newby to the magical world of statistics. So, right now I'm preparing for a "quantitative methods for economics" test, but while doing my exercises I found myself wondering about what could be very stupid things.

here's the thing: I had two questions, which respectively looked like this:

QUESTION 1: A consultant hired by a University claims that the average student housing expense was 350€ per month. What are the null and...

Constructing intervals VS hypothesis testing?]]>

So the first question was, what is the probability that the person selected randomly will be running regulary. So that I believe is 47%.

Then the second question was "Two events in the...

Relationship between events]]>

Any advice would be helpful.

Thanks Anthony]]>

Im working on a project involving adipose tissue from 10 different locations from 30 individuals, which equals 300 biopsies.

The biopsies has been analysed in regard to "adipocyte count" and "area pr adipocyte" using stereology and digital image processing. The minimum count of adipocyte pr biopsy is 154 and the maximum count is 852 adipocytes, hence the 300 biopsies do not have the same adipocyte count - each adipocyte has an area and diameter meaning that the mean of each biopsy do...

What kind of test for comparing right-skewed data?]]>

I have a set of data points as show in the above figure. The data points were then binned together such that there are enough data points in each bin.

After binning, I determine the variance of each bin as shown in the color plot below where the color represent the variance value.

(Dark blue (smallest variance) - yellow(highest variance))

Since the variance determine is some what dependent of the number of data points and the area of the...

Normalizing Variance Value]]>

For example :

Age Range Frequency

>=15 and <=20 100

>20 and <=25 256

>25 and <=30 278

>30 and <=35...

Is this possible?]]>

UK-based poster here. I'm sorry for the long post but I am quite stressed about this decision. It has large implications for my finances, job prospects and work-life balance for the next several years. So, I have put a lot down, so if you take the time to answer you will have a lot of data

I already have a bachelor's and a master's degree in Philosophy and would like advice on whether to do a Graduate Certificate in Statistics ('GC') or a second bachelor's in Mathematics and...

Graduate Certificate vs second Bachelors]]>

Anyway, my question is; after your pick, does it matter if the host picks one of the remaining two doors at random instead of deliberately choosing the empty one?

Obviously sometimes he will pick the door with the car behind it and...

Monty Hall extended]]>

But, in my opinion, two parameters are estimated: the mean is estimated by the sample mean and the variance is estimated by the sample variance (corrected). Then why shouldn't we use the t-distribution with n-2 degrees of freedom?]]>

I would appreciate your help in the following query.

I have a data set of three different groups of cancer patients and I need to show the difference in the size of the cancer in the three groups in a single graph. What type of graph would best serve this purpose?]]>

I do not know if the post head label my problem appropriately since I am quiet a beginner in this field but here it is:

My analysis is about the determinants that influence someone's chances to live in a low income area (

I have a categorical variable indicating the race of each borrower. After creating dummies with the reference category white and having included the 10 other...

Logit regression with categorical variables over represented in the sample]]>

First of all i compared the proportion of agreement(yes-yes, no-no) of them. The results was:

A-B= 78%

A-C=59%

B-C is out of my objective.

So I run a Pearson Correlation test, and the results was:

A-B=0,17 (p-value = 0,03)

A-C=0,11 (p-value=0,15)

Which test should I do to verify the correlation between these variables? Chi-square test?]]>

I want to compare the data for different emotions to see whether any two emotions have bodily sensations which occur in the...

Chi Squared test?]]>

I surveyed two groups of 50 people:

50 x people aged 40 and over

50 x people aged under 40

My hypothesis is that there is a significant difference between the opinions of people aged 40 and over and that of people aged under 40 as to whether they would consider allowing a robot perform a filling on their...

Help with choosing a method]]>

I am interested in comparing the frequency of each of these four behaviors among the high condition group to the...

Is it appropriate to use Mann-Whitney U test for each of four outcomes when outcomes are mutually exclusive?]]>

I find the mean hexadecimal color of the white paint by measuring several independent samples of Eggshell white (n=20 different paint cans) and I do the same for the Midnight black paint...

Sample size when adding two means]]>

I am prediction one-day-ahead solar energy output using 30 days historical data. The data sets are hourly, so the prediction is done hourly from sunrise to sunset.

I have doe the prediction using sliding window technique, When I am predicting 01/06, I am using 30 days historical data (from 02/05 – 31/05 ) for the training dataset that will be used to build the model, the training dataset include weather variables (global horizontal irradiance, direct normal irradiance, temperature and...

Solar energy prediction]]>

2. Assume that we drew a random sample of 300 women who had recently graduated from USC. All of these women worked full time in 2018. They earned an average salary of $42,167 (s.d. = $26,413). Based on data from the US Census Bureau, we know that the national average salary for women is $40,675.

a. USC is looking to make the case that women who have graduated from the university make significantly more than the national...

T Test word problem! HELP]]>

Came accross this website whilst trying to get somw help with a project Im doing.

Many thanks for any help.

Rob]]>

The equation is one year ahead stock returns as a function of a few...

Endogeneity and R-squared]]>

Im currently working in a research on higher education in the United States. I have searched for a database with the average tuition cost per institution (higher education) hopefully for the 1980 - 2015 period, but I have found nothing, so if anyone could point me in the right direction it would be much appreciated.

Thanks and have a beatiful day.]]>

male

1/2

neg

neg

neg

1/8

female

neg

1/4

1/16

1/2

1/4

For the descriptive part, if I got it right, I calculate the prevalence and use only the positive ones to calculate the mean. So, it would be in the male group the prevalence is 40% and mean titer X and in the female the prevalence is 80% and mean titer Y. The mean is or the...

Can you include negative results when doing statistics of antibody titers?]]>

I want to model smoking (0-1) with some socioeconomic characteristics (edu, age, cohort, sex, etc.). I have 4 waves of a survey, some respondents are present in all waves, while other started in waves 2, 3, etc. The duration between waves is also not always the same (i.g. 2 years between 1-2, 4 years between 2-3, 1 year between 3-4).

I'm not use to longitudinal analysis, so I wonder what kind of model I should use. I was first thinking to survival model (Cox), but I'm not sure, since...

What model for a discrete value with repeated observations]]>

Probability]]>

The image is from my lecturer]]>

I'm new to statistics and looking for some guidance on choosing my variables for a repeated measures ANOVA.

My data set consists of 4 dependent variables:

1. Gait speed

2. Balance test

3. Leg strength

4. fatigue rating

I'm trying to determine the difference between each of these measures when performed at different times per day:

1. Morning

2. Evening

My thought is that the Indep variable is the time of day and when running in SPSS I would enter morning and evening as the...

Repeated measures ANOVA]]>

I'm new to statistics and looking for some guidance on choosing my variables for a repeated measures ANOVA.

My data set consists of 4 dependent variables:

1. Gait speed

2. Balance test

3. Leg strength

4. fatigue rating

I'm trying to determine the difference between each of these measures when performed at different times per day:

1. Morning

2. Evening

My thought is that the Indep variable is the time of day and when running in SPSS I would enter morning and evening as the...

Repeated Measures ANOVA Inquiry]]>

1) Obtain the point predictions of

2) Obtain the predictions of

3) How are the parameters of this model estimated? Explain

How is it calculated / developed?

Photo please. Please]]>

I have a difficulty to determine the correct answer to an important question, because I heard two contrasting opinions on this.

Is it allowed to include a continuous factor (

My original intention was to determine whether age had a significant impact on my dependent variable...

Help needed - including a continuous factor in an ANOVA vs. Covariate analysis]]>

Does Physics use statistics and probability as heavily as Medicine does? My guess is No.

In Medicine, we're limited in that we can't experiment in most situations and therefore end up with conclusions drawn from analysing outcome measures that may have more predictor variables that we can conceive, yet we can only work with what we know, until we know more. We use large p-values of 5 percent. And...

How much of Science is based on Statistics]]>

Variable as confounding if it influences other factors in opposite directions?]]>

Results from 5 point likert scale: M: 3.34 (SD: .80) Results from 4 point likert scale: M: 2.18 (SD .44)

I want to compare these results, is that possible?

Thanks in advance,]]>

Suppose John chose a bag and then picked 1 coin from within, the coin was a gold coin, what's the probability

that he picked bag A ?

The answer is 0.5833 using Bayes' Theorem.

what's the probability that he picked bag A ?

Does anyone know how to calculate this?]]>

In the first test, a beetle is on his own in an arena and I measured the % of time he spends in each of THREE types of habitat (open, bush and underground). I repeat this experiment with several beetles.

In the second test, beetles are placed together with a beetle of a competing species in the arena and they are again observed for their % time in each habitat.

I want to test if the amount of...

Which stats test should I use?]]>

I am working on developing on a standardised score from a number of scores.

The values will be ranging from large to small of each score and I am trying to develop a way of proportionally measuring different data sets. I have something at the moment which is:

(x1/largest x in dataset1) x100

(y1/largest y in dataset1) x100

(z1/largest z in dataset1) x100

[and so on.. and then I find the mean of the answers.]

I then compare the mean to the another mean but from a different data...

Standardising a score of values]]>

I'm wondering which statistics should I use. I’ve conducted an acceptability judgment task using 7 point scale for 8 different conditions. My study has a 2*2*2 factorial design with two level for each factor, this results in 8 structures mentioned below.

Factor 1: A (-,+)

Factor 2: B (-,+)

Factor 3: C (-,+)

This results in 8 conditions:

Condition 1= A (+) , B (+), C (+)

Condition 2 = A (-) , B (+), C (+)

Condition 3 = A (+) , B (-), C (+)

Condition 4= A (-) , B (-), C (+)...

which test should I use?]]>

this is actually the first time I'm working on a big dataset and I really hope someone can give me some advice on how to handle missing data. I tried to find information regarding my problem but can't find any blog with the same issue.

I'm working on a dataset including different questionnaires. Some questionnaires measure the participants level of anxiety, depression etc and some questionnaires measure the same participants perception of compassion within their organisation. The...

All items missing for various questionnaires]]>

The dependent variables (company performance indicators) will also be time-series data...

Time Series Data for Business Performance: Regression Model?]]>

1) Can I use the variance of the parameter to build confidence intervals like I would with a normal distribution, ie lower 95 CI = mean -...

Fisher Matrix and Parameter Confidence Interval]]>

Thank you]]>