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April 18, 2014

Homework Help: Math: Statistics

Recent Homework Questions About Statistics

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statistics
With "or", it is unclear whether you want the probability between the scores, above them or below them. Assuming that you want the probability between the Z scores, find table in the back of your statistics text labeled something like "areas under normal ...
Sunday, September 8, 2013 at 2:06pm

statistics
P(z < -1.5 or z > 2.50) =
Saturday, September 7, 2013 at 3:39pm

STATISTICS
I state at the first row... True or false?
Friday, September 6, 2013 at 5:12pm

statistics (?)
Data missing. What is your question?
Friday, September 6, 2013 at 1:32pm

Statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores.
Friday, September 6, 2013 at 1:28pm

STATISTICS
Correlation does not necessarily indicate causation.
Friday, September 6, 2013 at 1:23pm

STATISTICS (?)
What is your question?
Friday, September 6, 2013 at 1:20pm

STATISTICS
Researchers asked questions in 1001 randomly selected adults in Russia. We found a statistically significant, strong positive correlation between income and the number of recycling bins filled their houses per week (r = 0,77). Choose the best interpretation of the result. &...
Friday, September 6, 2013 at 6:19am

STATISTICS
True or False? A researcher is interested in studying whether there is a correlation of IQ with health. For this purpose he selected a sample of 261 people and asked them to complete two questionnaires: one for IQ and one for health. After evaluating the questionnaires each ...
Friday, September 6, 2013 at 6:15am

Statistics (Please help!!!)
Are there tables comparing and contrasting the following or how would you write these up? 1. Ecological Studies and Cross-Sectional Studies 2. Case control studies and Cohort studies 3. Measurement bias (aka information bias) and selection bias 4. Nondifferential ...
Friday, September 6, 2013 at 4:46am

Statistics
The average life of Canadian women is 73.75 years and the standard deviation of the women's life expectancy in Canada is 6.5 years. Using the Chebyshev's theorem, determine the minimum percentage of women in Canada whose life expectancy is between 64 and 83.5 years.
Friday, September 6, 2013 at 12:39am

statistics
A car dealer is using the number of years customers have owned their vehicles to predict how long it will be before they elect to replace them. The correlation between the two is rxy = -.723 (the longer they have owned their present vehicles, the more quickly they are expected...
Thursday, September 5, 2013 at 5:23pm

Statistics (Please help!!!)
Here is the question: If gene frequencies are in equilibrium, the genotypes, AA, Aa, and aa occur in a population with frequencies (1-0)^2, 20 (1-0), and 0^2. Plato et al.published the following data on haptoglobin type in a sample of 190 people: Hp1-1 = 10 Hp1-2 = 68 Hp2-2 = ...
Wednesday, September 4, 2013 at 8:56pm

Statistics (Please help!!!)
The following table gives the number of deaths due to accidental falls for each month during 1970. Is there any evidence for a departure from uniformity in the rate over time? That is, is there a seasonal pattern to this death rate? If so, describe its pattern and speculate as...
Wednesday, September 4, 2013 at 8:48pm

Statistics
It can only be stated in probability terms. 68% = within one SD 95% = within 2 SD
Tuesday, September 3, 2013 at 3:47pm

Statistics
A population has µ=100 and õ=20. If you select a single score from this population, on the average, how close would it be to the population mean? Explain your answer
Monday, September 2, 2013 at 10:11pm

Statistics
You are welcome.
Sunday, September 1, 2013 at 1:58pm

statistics
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
Sunday, September 1, 2013 at 1:55pm

statistics
7) A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
Sunday, September 1, 2013 at 12:25am

Statistics
Besides, movie theaters make the most profit from selling food.
Saturday, August 31, 2013 at 1:02pm

Statistics
Your reasoning is good. :-)
Saturday, August 31, 2013 at 1:01pm

Statistics
tickets for movies are usually one price right? im thinking the tickets are more beneficial bc you don't know what the person wants to eat and how much of it. this is an extra credit question
Saturday, August 31, 2013 at 12:56pm

Statistics
Yikes! That depends upon what you and your friend eat! It also depends upon the cost of the movie. Where did you get such a crazy question?
Saturday, August 31, 2013 at 12:52pm

Statistics
Going to the movies tonight with one friend. Is it more beneficial for me to pay for the tickets or food? Please explain your reasoning
Saturday, August 31, 2013 at 12:51pm

Statistics
1. A pie chart can not be used for a frequency distribution with overlapping classes. A) True B) False True?
Friday, August 30, 2013 at 3:55pm

Statistics
correlation coefficient is not related to p value. You cannot draw conclusions using the correlation coefficient.. I changed my mind... The answer is True.. If it was o.30 or bigger it would be false..
Friday, August 30, 2013 at 2:26pm

STATISTICS
Thank you!!
Friday, August 30, 2013 at 2:21pm

Statistics
Thank you!!
Friday, August 30, 2013 at 2:21pm

Statistics
Right.
Friday, August 30, 2013 at 2:19pm

STATISTICS
Whichever correlation is closest to ±1 is right. That is choice D.
Friday, August 30, 2013 at 2:18pm

Statistics
First one is B. I would agree with the second too, if P<.05.
Friday, August 30, 2013 at 2:17pm

STATS
A researcher conducted a survey on a sample of 2000 college-students in order to examine the relationship between academic achievement and procrastination of studying. Using several indicators and plots of the descriptive statistics, found that in the data were many outlier ...
Friday, August 30, 2013 at 9:34am

Statistics
A researcher wants to study the effect of gender on mathematical ability of lyceum children. From the data gathered tried to construct a scatter diagram. He did not succeed to make it though. Why?   a. Had not collected enough data. b. He did not know how to construct it...
Friday, August 30, 2013 at 7:29am

Statistics
The last one is false right? there is a correlation (weak).
Friday, August 30, 2013 at 7:25am

Statistics
After making an investigation, during which the relationship between intelligence and academic achievement, calculated the correlation coefficient between the two variables, which was found to be 0.29. The researchers concluded that there is no correlation between the two ...
Friday, August 30, 2013 at 7:24am

STATISTICS
Which of the following correlation coefficients is higher? a. -0.68 b. 0.60 c. 0.68 d. a and c e. None of the above a and c right?
Friday, August 30, 2013 at 7:19am

Statistics
The scatter diagram shows: a. The frequency with which each value occurs in the data. b The values ​​of a variable designed in comparison with the values ​​of a second variable. c. The mean data sets. d. The percentage of data belonging to different ...
Friday, August 30, 2013 at 7:19am

accounting statistics
Find the balance at the end of 6 years of $5000 investment in an account with a nominal annual rate of interest of 2.5% compounded quarterly over the first two years and then grows according to nominal annual rate of discount of 6% convertible monthly over the remaining 4 ...
Thursday, August 29, 2013 at 7:04pm

Statistics
1. Definitely NOT II. 2. How did they know that the students started with the "same levels of mathematical achievement"? Was Britain's National School-Leaving Exam given previously? 3. Right.
Thursday, August 29, 2013 at 3:15pm

Statistics/Math
156
Thursday, August 29, 2013 at 8:13am

Statistics Ms. Sue
Here's your original post: linear correlation between the number of years in college versus average pay. average pay= 1,000 + 15,000x where x is the number of years in college. What would your average pay be if you were in college 2 years based on the model? 1,000 + (15,...
Wednesday, August 28, 2013 at 7:27pm

Statistics Ms. Sue
Thank you Ms. Sue for the answer. I just wanted to know how you arrived at that $31000, because I have a number of problems like that one. Thank you. Mary
Wednesday, August 28, 2013 at 7:22pm

Statistics
What didn't you understand about my previous answer? http://www.jiskha.com/display.cgi?id=137​7723981
Wednesday, August 28, 2013 at 7:00pm

Statistics
linear correlation between the number of years in college versus average pay. average pay= 1,000 + 15,000x where x is the number of years in college. What would your average pay be if you were in college 2 years based on the model?
Wednesday, August 28, 2013 at 6:52pm

Statistics
A study in England attempted to determine the "right" method for teaching mathematics. A random sample of 248 students was chosen from the school at large. The students were randomly assigned to one of two classes. At the beginning of the research, the students had ...
Wednesday, August 28, 2013 at 6:08pm

Statistics
$31,000
Wednesday, August 28, 2013 at 5:24pm

Statistics
linear correlation between the number of years in college versus average pay. average pay= 1,000 + 15,000x where x is the number of years in college. What would your average pay be if you were in college 2 years based on the model?
Wednesday, August 28, 2013 at 5:06pm

STATISTICS
Are the student final exam scores in classroom A significantly different than the average of classroom B, 80%? Provide the Independent Variable, Dependent Variable, and best method of analysis.
Wednesday, August 28, 2013 at 12:15am

Statistics
1. correct 2. Wrong. Look up definitions of 'sample" and "Census". 3. Wrong. Look up sampling error. 4. Wrong. Look up statistic and parameter. 5. Wrong. Look up statistic and parameter. 6. Right. 7. Right. 8. Right. 9. Right. 10. Right. 11. Right. 12. Wrong...
Tuesday, August 27, 2013 at 2:52pm

Statistics
2.376
Monday, August 26, 2013 at 7:45pm

Statistics
2.376
Monday, August 26, 2013 at 7:44pm

Statistics
I am respectfully requesting help with the following assignment. I am struggling in this chapter of statistics... Define the term sample? A) A sample is a numeric characteristic of a sample B) A sample is a numeric characteristic of a population C) A sample is the entire ...
Monday, August 26, 2013 at 2:08pm

Statistics
16. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to to the Z score. 17. Use same equation and table. 18. Use table to find P = ± ,45 to ...
Monday, August 26, 2013 at 1:31pm

statistics (incomplete)
1. You answered this in your second question. There is no data to help in making a decision.
Monday, August 26, 2013 at 1:16pm

ju department of statistics
blood measureseveral weeks av.182 with sandard daviation 12.6 another petiont av.124 standad daviation 9.4 which petionts blood more variable
Monday, August 26, 2013 at 5:36am

statistics
1.What’s the most appropriate procedure for evaluating the relationship between tenure and divorce? 2.What is the correlation and how can it be interpreted in terms of magnitude, direction and practical importance? 3.How much of whether executives have been divorced can ...
Sunday, August 25, 2013 at 11:47pm

Intro to Healthcare Statistics
What is YOUR question? The instructions seem very clear and detailed.
Sunday, August 25, 2013 at 7:56pm

Intro to Healthcare Statistics
Discuss how statistics are generated and how statistical information is used by healthcare organizations. Explore the NC State Center for Health Statistics at the following website and discuss at least two types of statistic health information that NC collects.
Sunday, August 25, 2013 at 7:29pm

Statistics
4) The P-value of the appropriate test is about ________%.
Sunday, August 25, 2013 at 8:48am

Statistics
A statistician believes that in her town each child born has a 50% chance of being a girl, independently of all other children. There are 281 three-child families in her town; 39 of these families have no girls, 94 have one girl, 115 have two girls, and the remaining 33 have ...
Sunday, August 25, 2013 at 8:45am

statistics
Use the following scenario to answer the next 5 questions. Millions of Americans are subjected to drug testing in the workplace. The tests are not always reliable. A false positive rate of 5% is considered to be a conservative estimate. Suppose that there are 20 employees in ...
Saturday, August 24, 2013 at 7:10pm

Statistics
The next three questions refer to the following situation. Data from previous years reveal that the distribution if first exam scores in an introductory statistics class is approximately normal with a mean of 72 and a standard deviation of 12. 16) Given that the passing score ...
Saturday, August 24, 2013 at 6:47pm

Statistics
problem 1: The treatment does something Problem 2: False
Saturday, August 24, 2013 at 10:03am

Statistics
A statistician analyzing a randomized controlled experiment has tested Null: The treatment does nothing. Alternative: The treatment does something. using a 4% cutoff for P-values. The P-value of the test turns out to be about 1.8%. 1. The conclusion of the test is -The ...
Saturday, August 24, 2013 at 6:08am

statistics
Researchers conducted a survey of parents of 66 kindergarten children. The parents were asked whether they played games with their children. The parents were divided into two groups: working class and middle class. The researchers wanted to know if there was an association ...
Friday, August 23, 2013 at 9:08pm

Statistics
thanks . for other question answer is click both the options
Friday, August 23, 2013 at 11:21am

Statistics
thanks
Friday, August 23, 2013 at 11:19am

Statistics
Problem 3, under null is 25 number of plants in Category D.
Friday, August 23, 2013 at 7:07am

Statistics
It’s been a long road through Stat 2X. Please click on BOTH the options below for a score of 2 points. a)She gave us a couple of free points in each of the previous two courses. b)She’s not going to forget the freebies this time Please, help me.
Thursday, August 22, 2013 at 11:35pm

Statistics
0.2775
Thursday, August 22, 2013 at 9:27pm

Statistics
Problem 5 Degrees of freedom = _______.
Thursday, August 22, 2013 at 5:27pm

Statistics
1. 79/grand total = ? 2. df for what?
Thursday, August 22, 2013 at 1:28pm

Statistics
If the two variables were independent, the chance that a sampled car is a domestic gasoline fueled car would be estimated to be about 0.0362 0.0499 0.2775 0.3820 0.5
Thursday, August 22, 2013 at 12:14pm

Statistics
what's the answer? Under the null, the expected number of plants in Category D is ______.
Thursday, August 22, 2013 at 11:38am

Statistics
75.3033 is the answer
Wednesday, August 21, 2013 at 8:26pm

Statistics
A simple random sample of cars in a city was categorized according to fuel type and place of manufacture. domestic foreign gasoline 146 191 diesel 18 26 gasoline/ 51 79 electricity hybrid 1. If the two variables were independent, the expected number of foreign gas/electric ...
Wednesday, August 21, 2013 at 4:22pm

Statistics
According to a genetics model, plants of a particular species occur in the categories A, B, C, and D, in the ratio 9:3:3:1. The categories of different plants are mutually independent. At a lab that grows these plants, 218 are in Category A, 69 in Category B, 84 in Category C...
Wednesday, August 21, 2013 at 4:16pm

Statistics
According to DeVeaux/Velleman, the best way to succeed in the study of statistics is to memorize definitions and learn equations? True or False I chose True
Wednesday, August 21, 2013 at 4:09pm

Statistics
I agree. http://www.oswego.edu/~srp/stats/variabl​e_types.htm
Wednesday, August 21, 2013 at 4:00pm

Statistics
Is GPA a quantitative or categorical variable? I think it is quantitative because it consists of numbers...
Wednesday, August 21, 2013 at 3:54pm

Statistics
prob 1 - the model is good
Wednesday, August 21, 2013 at 1:51pm

Biology (Science)
Are you just guessing? 1. What peers are mentioned? Not frogs. Data 2. Observation 3. "statics" or statistics? Although "Analysis" is not listed in your word bank, it applies here. 4. What are other scientists considered to be? 5. This is the only one you ...
Wednesday, August 21, 2013 at 1:49pm

Statistics
what's the answer? Under the null, the expected number of plants in Category D is ______.
Wednesday, August 21, 2013 at 9:52am

Statistics
and what's the answer ? If the two variables were independent, the expected number of foreign gas/electric hybrids would be estimated to be _______. (Please keep at least two decimal places)
Wednesday, August 21, 2013 at 9:51am

Statistics
what's the answer? If the two variables were independent, the chance that a sampled car is a domestic gasoline fueled car would be estimated to be about 0.0362 0.0499 0.2775 0.3820 0.5
Wednesday, August 21, 2013 at 9:50am

Statistics
@walter de u link doesn't work
Wednesday, August 21, 2013 at 2:30am

Statistics
Thanks, Walter DE
Tuesday, August 20, 2013 at 12:08am

statistics
0.9066
Monday, August 19, 2013 at 6:34pm

Statistics
Exercise set 5 answers: 4c51a450.linkbucks Note: add dotcom after the word linkbucks you're welcome
Sunday, August 18, 2013 at 4:58pm

Statistics
Exercise set 5 answers: 4c51a450.linkbucks Note: add dotcom after the word linkbucks you're welcome
Sunday, August 18, 2013 at 4:56pm

Statistics
Problem 3?
Sunday, August 18, 2013 at 3:56pm

Stats
Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something like "...
Sunday, August 18, 2013 at 3:04pm

statistics
The P-value of the test is
Saturday, August 17, 2013 at 6:32pm

Statistics
how do you do p8?
Saturday, August 17, 2013 at 5:40pm

Statistics
how do u do question 2 whats the method
Saturday, August 17, 2013 at 4:36pm

Statistics
I believe it is!!!!!
Saturday, August 17, 2013 at 4:06pm

Statistics
So, is 75.3033 ok for Foreign and Hybrid??
Saturday, August 17, 2013 at 3:08pm

Statistics
The chi-square statistic is 0.6716. The test therefore concludes that the two variables are independent Degrees of freedom = 2
Saturday, August 17, 2013 at 1:47pm

Statistics
I get 75. something for foreign and hybrid.. is that right?? And ok for NULL, meaning INDEPENDENT.. Can you help me with this?
Saturday, August 17, 2013 at 12:59pm

Statistics
Ok.. so I have done this.. And I´ve got the first questions right.. Made a fool of myself with the degrees of freedom, but now I know better... For the question of foreign/hybrid I got 195.209392 for my first try and got it wrong... I messed up the columns.. I need to ...
Saturday, August 17, 2013 at 12:56pm

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