1,029 Answered Questions for the topic Statistics Question

Statistics Question Statistics

06/23/17

distribution
a normal distribution has a mean of 100 with standard deviation of 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between... more
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Statistics Question

06/19/17

Are you more likely to make a Type I error when using a large sample?
Are you more likely to make a Type I error when using a large sample or a small sample?
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Statistics Question

06/18/17

Find the​ range, variance, and standard deviation for the given sample data120 142 143 130 129 122
I solve the range which is 23
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Statistics Question Word Problem

06/18/17

Outcome & Prob
For the dinner special at a restaurant, the customer must choose an appetizer, an entree, a side dish, and a dessert.Here are the items to choose from. How many dinner specials are possible?... more
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Statistics Question

06/17/17

Assume Z is a standard normal random variable with mean 0 and variance 1. Find P(Z<0.44)? Area below 0.44?
I need help with this question   
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Statistics Question

06/09/17

MATH QUESTION PLEASE ANSWER
A MEDICAL COMPANY TESTED A NEW DRUG FOR POSSIBLE SIDE EFFECTS THE TABLE SHOWS THE RELATIVE FREQUENCY THAT A STUDY PARTICIPANT EXPERIENCED THE SIDE EFFECT                      SIDE EFFECT         ... more
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Statistics Question

05/31/17

What would be the margin of error for the following? 90% Confidence, 81.3 bpm < µ(Pulse) < 84.2 bpm
I have no idea what I'm doing
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Statistics Question Statistics

05/30/17

What is the probability that he will choose two raincoats of the same pattern?
There are nine raincoats in size 6-8 on sale in the girl's department at Bloomingdale's. Three have tulips, four have bunnies, and two have hearts. Mack is in a rush and randomly chooses two... more
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Statistics Question Statistics Stats

05/26/17

the box and whisker plot can be used to identify
A) Skewedness B) Outliers C) Symmetry D) Centerness
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Statistics Question

05/22/17

statistics
Write the null and alternative hypotheses for the following example. Determine if it is a case of a two-tailed, a left-tailed, or a right-tailed test.To test whether the mean starting salary of... more
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Statistics Question

05/22/17

statistics
The standard deviation for a population is σ=7.47. A random sample selected from this population gave a mean equal to 49.63. Construct a 95% confidence interval for μ assuming n=100.Round your... more
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Statistics Question

05/22/17

Scores on a history test have average of 80 with standard deviation of 6. What is the z-score for a student who earned a 75 on the test?
round to nearest thousandth
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Statistics Question

05/20/17

Statistics question.
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.When 332 college students are randomly selected and surveyed, it is found that... more
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Statistics Question

05/20/17

Statistics question.
Express the confidence interval -0.129 < p < 0.631 in the form of ± E.
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Statistics Question

05/20/17

Plz help with elementary statistics homework problem
Human body temperatures are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F. Find the temperature that separates the top 7% from the bottom 93%. Round to the nearest... more
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Statistics Question

05/19/17

quaity documentation and statistical significance
  I am auditing 30 charts for quality documentation. If for one specific question, only 2 of the 30 charts apply and 0/2 charts meet the requirements, is this statistically significant? Please... more
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Statistics Question

05/16/17

If I obtain a score of 100 on a test that has a mean of 120 and a standard deviation of 10, what is my standard score? What would be my T score (mean of 50 and
If I obtain a score of 100 on a test that has a mean of 120 and a standard deviation of 10, what is my standard score?  What would be my T score (mean of 50 and standard deviation of 10)?
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Statistics Question

05/16/17

An alpha level of 0.05 means what? What about an alpha level of 0.01, 0.001, 0.10, and 0.20?
An alpha level of 0.05 means what?  What about an alpha level of 0.01, 0.001, 0.10, and 0.20?
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Statistics Question

05/11/17

Can the variance between 2 groups be close to equal and the p-value be 0.4, stating that there's significance?
X 4,2,5,1,3,5,3,7,3,5 Y 6,5,2,8,3,4,8,5,1,4  i did an f test and my f stat was 1.75 which was less than my F critical 3.18..stating close to equal variances.   i have a p value= 0.4 so I reject... more
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Statistics Question Math Statistics Math Help

05/10/17

What hypothesis and which test do I use?
Which county had the highest median income between 2006 to 2010? The answer is Los Angeles. I have a real data, how do I turn this question to a hypothesis and which test do I use?
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Statistics Question

05/08/17

The exam scores are normally distributed with a mean of 76 and a standard deviation of 8. Bob scored an 88.Determine the z-score for Bob.
Students in a college course take a common final exam. The exam scores arenormally distributed with a mean of 76 and a standard deviation of 8.Bob scored an 88 and Tom scored a 69.a.) Determine the... more
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Statistics Question

05/08/17

Write down an expression for the linear regression equation to predict the variation in exam results from hours of study.
we are given a graph and this is the question
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Statistics Question

05/07/17

PROBABILITY
An urn contains pink and green balls. Five balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the... more
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Statistics Question

05/07/17

The 8th grade class of City Middle School has decided to hold a raffle to raise money to fund a trophy cabinet as their legacy to the school. A local business l
1) Suppose you buy 1 ticket. What is the probability that the ticket you buy is the winning ticket? (Assume that all 2500 tickets are sold.) 2) After thinking about the prize, you decide the prize... more
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Statistics Question

05/07/17

twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below.
The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the data to construct a 95% confidence interval estimate of the mean duration of game... more
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