945 Answered Questions for the topic Statistics Question

Statistics Question

07/25/17

Scientific Method: Stating a hypothesis, Collecting data using some sort of sampling plan; Rejecting or not rejecting the hypothesis.
Scientific Method: Stating a hypothesis, Collecting data using some sort of sampling plan; Rejecting or not rejecting the hypothesis.How would you describe the process of moving from a null... more
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Statistics Question

07/25/17

Looking for the Z score
Find the Z score for the weights of Middle school boys which are approximately Normal, mean = 130 lbs, Standard Deviation = 7, if Johnny weighs 148 lbs, What's his Z score?
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Statistics Question

07/24/17

The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail.
The failure rate in a statistics class is 20%. In a class of 50 students, find the probability that less than eight students will fail. Pleaseeeee I need HELPPPP
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Statistics Question Statistics

07/11/17

Confidence Interval Question
A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 16. The psychologist randomly selects... more
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Statistics Question

07/11/17

Test statistic and p-value
In 2004, a random sample of 46 coyotes in a region of northern Minnesota showed an average age to be 2.05 years with a standard deviation of 0.82 years. However, it is thought that the overall... more
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Statistics Question

07/08/17

Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean μ=228 days and standard deviation σ=11 days.
What is the probability that a randomly selected pregnancy lasts less than 224 days?
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Statistics Question

07/05/17

Statistics word problem
In a survey amongst freshmen at StudyMore College, the average number of hours spent studying for their math class was 15.4 hours per week with a standard deviation of 2.65. Assuming the population... more
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Statistics Question

07/05/17

Statistics word problem
A battery pack manufacturer claims their product will run two cell phones playing Pokemon go an average of 12 hours with a standard deviation of 2.4 hours. A random sample of 40 battery packs is... more
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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

05/19/17

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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