1,011 Answered Questions for the topic Statistics Question

Statistics Question Standard Deviation Distribution

01/24/16

HELPPPPPPPPP PLEASE!!!!!!! Seriously need help on this!!!
A company’s manufacturing process uses 500 gallons of water at a time, a scrubbing machine then removes most of the chemical pollutant before pumping the water into a lake. Legally the treated... more
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Statistics Question

01/24/16

Response Time
Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a... more
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Statistics Question

01/23/16

STATS question
The access code for a car's security system consists of six digits. The first digit cannot be 5 and the last digit must be odd. how many different codes are available?
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Statistics Question

01/22/16

Stuck on this certain Q:
A group of investigators decided to test the hypothesis that use of postmenopausal hormone replacement therapy increases the risk of breast cancer. They identified 200 women with newly diagnosed... more
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Statistics Question

01/22/16

how many 2 letter words can be formed using the english alphabet if the 2 letters are not the same?(they don't have to be actual words)
Please explain how to get the answer
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Statistics Question Stats Population

01/19/16

. Construct a population data set for which 5, and 2.
Construct a population data set for which N=6, populationman=5, and σ=2.
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Statistics Question

01/15/16

What is the population? What is the sample from which the information is actually obtained?
Pregnant and breastfeeding women should eat at least 12 ounces of fish and seafood per week to ensure their babies optimal brain development, according to a coalition of top scientist from private... more
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Statistics Question

01/14/16

is this a population
All rookie players in the NBA during 2012-13 and 2013-14 season
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Statistics Question

01/12/16

STAT Help!
1)   A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is the degrees of... more
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Statistics Question

01/12/16

A box contains 3 red, 1 white, and 6 green balls. If a ball is selected at random, find the following probabilities
Probability
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Statistics Question

12/29/15

What is the best statistic for me to use to determine whether a wellness intervention was successful?
What is the best statistic for me to use to determine whether a wellness intervention was successful? I have data from 2012 (pre-intervention) for 60 people followed by annual data... more
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Statistics Question

12/15/15

Could someone give me some help with this Please!!!!!
I need help with this!!!!   Assume that the significance level is α=0.05. Use the given information to find the P-value and the critical value(s).The test statistic of z=1.63 is obtained when... more
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Statistics Question Statistics Standard Deviation

12/14/15

The following question has to do with statistics
Maria Thomas a teacher at Henry elementray school noted grades of her students which were distributed with a mean of 74 and a standard deviation of 10. María thomas has informed us that 6.3 percent... more
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Statistics Question

12/14/15

I have no Idea what too do with this Problem!!!!!!
I can't solve this please assist   Find the critical value za/2 that corresponds to the given confidence level 84%    za/2 = rounded to two decimal places as needed
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Statistics Question

12/14/15

Urgent Help Needed!!!!
could someone help me with this please!!!!   Assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation 15. Find P3, which is the IQ score... more
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Statistics Question

12/14/15

Statistics
compute 95% confidence interval to estimate for the population meanμ, if the sample mean =27.4, standard deviation δ=16 and n=100
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Statistics Question

12/12/15

can you calculate the mode of a distribution using only the standard deviation and mean?
Stats question asking me to calculate the mode of a frequency, but only information given is the mean and the standard deviation. Is this possible? 
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Statistics Question Statistics Math Help For College

12/11/15

Statistics, P-value. Help please!
A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful if the average time... more
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Statistics Question

12/10/15

The mean of a set of scores on a computer science test is 77 and the standard deviation is 5.
The mean of a set of scores on a computer science test is 77 and the standard deviation is 5.a. Convert each of the following scores to standard units: 89, 68, 94 and 55.b. Find the test scores... more
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Statistics Question

12/08/15

Statistics Help Please
Could someone assist me with this please!!!!   Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of... more
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Statistics Question

12/04/15

Statistics problem
With the height of 67 inches, Ronald with the shortest president of a particular club in the past century. The club president of the past century have a mean height of 7.8 inches and a standard... more
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Statistics Question Statistics

12/03/15

Hypothesis testing!!
I am so lost in where to begin for this question...   A random sample of 10 students were trying to determine which profession was best suites for them. They each took aptitude tests for Social... more
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Statistics Question

12/02/15

Percentage of graduates that get degree in 5 years when average is 6.5 and standard deviation is 1
Standard deviation is 1 year and average is 6.5 years 
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Statistics Question

12/01/15

The weights of cockroaches living in a typical college dorm are approximately distributed with a mean of 80 grams and a standard deviation of 4 grams.
The percentage of cockroaches weighing between 71 grams and 80 grams is about?
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Statistics Question

12/01/15

Findinng the proportion
Using sample data A confidence level of 95% N=2392 x=971 What is the best point estimate of the population proportion P.  Please round 3 places. Thanks
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