970 Answered Questions for the topic Statistics Question

Statistics Question

09/18/15

Statistcs help
With a height of 63 in, Johnson was the shortest president of a particular club in the past century. The club presidents of the past century have a mean height of 66.5 in and a standard deviation... more
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Statistics Question

09/18/15

Statistcs help
I don’t know I don’t know if the statistics is done on this site however here is my problem and I don’t not have answered this. My booklet says Listed below are the errors between the predicted... more
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Statistics Question

09/17/15

When, if ever, should a researcher use a one-tailed p-value for alpha?
Would researchers use a one-tailed p-value for alpha, if so when?
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Statistics Question Statistics Statistics Method

09/15/15

How do you figure out if coefficients are statistically significant at a certain level?
I have a table with regression statistics, cofficients, SE, t-stat, p-value, lower 85% and upper 95%.   I'm not even sure where to start.   1. I need to find statistical significance at 10% 2.... more
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Statistics Question

09/14/15

Determine whether H0 should be rejected
Suppose we have a multinomial population with four categories:A, B, C, and D. The null hypothesis is that the proportion of items is the same in every category. A sample size of 300 yields the... more
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Statistics Question

09/11/15

I need help with this stats question without using technology like Minitab to get the answer
The presence of harmful insects in farm fields is detected by erecting boards covered with a sticky substance and then examining the insects trapped on the board. To investigate which colors are... more
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Statistics Question

09/07/15

quantitative vs qualitative
What are the quantitative and qualitative variables in this study. You are conducting a study of students doing work- study jobs on campus, and you create a survey to gather data.Among the... more
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Statistics Question

09/03/15

Find the z-score and interpret it
1. Find the z-score of the value 139 in a dataset with mean 111 and standard deviation 8. Interpret the z-score in terms of number of standard deviations above or below the mean.z-score=? The... more
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Statistics Question

08/22/15

successful 75% of the time. If the results of 9 such surgeries are randomly sampled, what is the probability that more than 7 of them are successful? Carry you
 successful 75% of the time. If the results of 9 such surgeries are randomly sampled, what is the probability that more than 7 of them are successful?
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Statistics Question

08/20/15

an example of educational research studies that used a .01 significance level and why?
 an example of educational research studies that used a .01 significance level and why?
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Statistics Question

08/19/15

Ten thousand marbles were produced on a production line. The first 100 marbles off the line s. Does this sampling result in a simple random sample?
A. Yes, because each item has an equal chance of being selected. B. Yes, because each group of n items has an equal chance of being... more
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Statistics Question

08/17/15

refer below
5. For the data presented below, answer the questions that follow. scores=   individual       Politictical test    Current event 1                        24.                       23 2.      ... more
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Statistics Question Null Hypothesis Testing Z Score

08/12/15

College Statistics problem help
A weight loss center provided a loss for 72% of its participants.  The center’s leader decides to test a new weight loss strategy on a random sample size of 140 and found weight loss in 78% of the... more
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08/12/15

Trule/False Questions. Statistics
1: p-value is the probability of obtaining a sample result at least as extreme as that which was observed, assuming the null hypothesis is true. 2:An experiment is necessary to establish a... more
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08/12/15

Statistics question. Null, alternative hypothesis
You are studying what proportion of SU students smoke.  The null hypothesis is p = 0.27, and the alternative hypothesis is p > 0.27.  Your study obtains a p-value of 0.001.  Using a significance... more
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Statistics Question

08/10/15

Probability that a person has an IQ of at least 130
If IQ scores are normally distributed with a mean of 100 and a standard deviation of 20, then what is the probability that a person has an IQ score of at least 130? 
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Statistics Question

08/10/15

Report "A" was Pulled 1300 times. Report B was pulled 8700 times. What percentage more was Report B pulled than report A?
 I am trying to show the percentage that report B was pulled more than Report A.  I know Report B was pulled 87% of the time but it doesnt seem like that would be the answer. I know this is... more
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Statistics Question

08/08/15

I have an unusual statistical question to ask...
I would like to calculate a percentage increase per incremental period. For example, let's say that the national debt increased from $100 billion to $150 billion (wishful thinking) during a... more
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Statistics Question

08/08/15

mass fom a machine have a mean of 200g and standard deviation of 2g.find the probability that (i)package from machine weighs less than 196g(i)weights198.5n199.5
to find probability
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Statistics Question

08/07/15

mass fom a machine have a mean of 200g and standard deviation of 2g.find the probability that (1)package from machine weighs less than 196g(2)weights198.5n199.5
probability
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Statistics Question

08/06/15

69 + 29 = Hats, balloons, whistles, canes and horns
I don't know how to sole this, Is it a valid problem or a trick question?
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Statistics Question

08/01/15

Why is the SD in (d) which is 12,10,9,8, 6,45 is larged compared to 12,10,9,8,6
Why is the Standard deviation which is 12, 10, 9, 8, 6, 45, so large compared to Standard deviation 12,10,9,8,6
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Statistics Question Statistics

07/29/15

What is your conclusion for the following claim: Claim: p = 0.34, P-value = 0.014, and a (alpha) = 0.05.
What is your conclusion for the following claim: Claim: p = 0.34, P-value = 0.014, and α (alpha) = 0.05.       A. there is not enough information to draw a conclusion  B. fail to reject null... more
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Statistics Question Statistics Symbolic Form

07/29/15

For the following statement, express the claim in symbolic form (null and alternative hypotheses): At least half the students at this school carpool to campus.
For the following statement, express the claim in symbolic form (null and alternative hypotheses): At least half the students at this school carpool to campus.       Ho: p = 0.50 and Ha: p >... more
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Statistics Question

07/28/15

Finding the standard deviation.
The probability that a radish seed will germinate is 0.7. A gardener plants seeds in batches of 17. Find the standard deviation for the number of seeds germinating in each batch.
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