1,029 Answered Questions for the topic Statistics Question

Statistics Question

03/25/15

statistics question
For year 2003, the SAT test scores were normally distributed with a mean of 1050 and a standard deviation of 150.What percentage of the SAT scores is above 1050?
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Statistics Question

03/25/15

Addition Rule and when do you use the Multiplication Rule in probablity , What is the difference?
Im currently trying to understand addition and multiplication probability I just need some assistance for a clearer understanding
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Statistics Question Statistics

03/25/15

STAT HELP Question
In the 2010 World Cup, Paul the Octopus (in a German aquarium) became famous for being correct in all eight of the predictions it made, including predicting Spain over Germany in a semi-final... more
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03/24/15

Help finding the sample size! Statistics
A paint manufacturer uses a machine to fill gallon cans with paint.   a)The manufacturers wants to estimate the mean volume of paint the machine is putting in the cans within 0.25 ounces.... more
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Statistics Question

03/23/15

statistics
he amount of coffee that a filing machine puts into an 8 ounce jar is normally distributed with a mean of 8.2 ounces and a standard deviation of 0.18 ounce what is the probability that the sampling... more
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Statistics Question

03/19/15

Probability of draws without replacement. please help! I'm stuck!
An urn contains red balls and white balls. If Frank chooses balls at random from the urn, what is the probability that he will select red balls and white balls? Round your answer to decimal... more
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Statistics Question

03/19/15

Probability of Draws
A history class is comprised of female and male students. If the instructor of the class randomly chooses students from the class for an oral exam, what is the probability that female students... more
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Statistics Question

03/19/15

Probability
An urn contains white balls and red balls. If Juan chooses balls at random from the urn, what is the probability that he will select white balls and red balls? Round your answer to decimal... more
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Statistics Question

03/19/15

Probability of draws
A history class is comprised of female and male students. If the instructor of the class randomly chooses students from the class for an oral exam, what is the probability that female students... more
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Statistics Question

03/18/15

Statistics Question
A machine produces washers which must satisfy certain size and quality specifications. It produces a defective washer with probability p. Every hour a sample of ten washers is inspected and, if two... more
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Statistics Question

03/17/15

Statistics
A true false test contains 8 questions. In how many different ways thetest can be completed?
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Statistics Question

03/17/15

Statistics
8 people are running a race. How many results we can have, if first,second, and third place have to be filled?
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Statistics Question

03/17/15

Statistics
Five different books are on a shelf. In how many different ways couldyou arrange them?  
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Statistics Question

03/17/15

A peculiar die has the following properties
A peculiar die has the following properties: on any roll the probability of rolling either a , a , or a is , just as it is with an ordinary die. Moreover, the probability of rolling either a , a ,... more
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Statistics Question

03/15/15

with a mean of 166 cm and a standard deviation of 9 cm. Using the Epirical Rule, what is the approximate percentage of the men between 157 cm and184 cm?
heights of men on a baseball team have a bell-shaped distribution with a mean of 166 cm and a standard deviation of 9 cm. Using the Epirical Rule, what is the approximate percentage of the men... more
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Statistics Question

03/15/15

Because it's affected by every observation in the distribution, the mean is particularly sensitive to ..??
Because it's affected by every observation in the distribution, the mean is particularly sensitive to a) any extreme observation. b) large numbers of observations. c) the large subset of... more
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Statistics Question

03/15/15

Unlike the mode or median, the mean is affected by .. ??
Unlike the mode or median, the mean is affected by a) only those observations that are middle-ranked. b) only those observations that occur most often. c) all those observations that are... more
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Statistics Question

03/15/15

To describe the average daily load of clients for psychotherapists working at a mental heath clinic, a spokesperson reports ..??
To describe the average daily load of clients for psychotherapists working at a mental heath clinic, a spokesperson reports a mean load of 5.2 clients and a median load of 7.5 clients. This implies... more
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Statistics Question

03/15/15

you're told that the shape of the distribution of burning times for light bulbs is balanced ..... ??
you're told that the shape of the distribution of burning times for light bulbs is balanced, with a mean burning time of about 1500 hours. therefore you can conclude that the median burning... more
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Statistics Question

03/13/15

Standard Deviation and Mean
In an earlier study men with coronary heart disease has a mean systolic blood pressure of 148 mmHg with a standard deviation of 16.5 mmHg. You wish to repeat this study with a similar population of... more
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Statistics Question

03/10/15

Which of the following is the correct way, in classical hypothesis-testing, to understand a p-level of 0.01?
a) The probability that the null hypothesis is true is 0.01 b) The probability that the sample statistic shows the true relationship or parameter is 0.01. c) If the null hypothesis were true, the... more
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Statistics Question Math Help Probability Stats

03/09/15

Statistics Homework Help!
A surprise quiz contains three multiple-choice questions: Question 1 has four suggested answers. Question 2 has three, and Question 3 has two. A completely unprepared student decides to answer... more
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Statistics Question Math Help

03/08/15

Math question about Statistic
1. Students need to score 30 or above in the final exam to pass a module at University A. Assume final exam score is normally distributed.   (a) The teacher of STAT101, a module at University A,... more
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Statistics Question

03/07/15

A sample of 16 small bags of the same brand of candies was selected. Assume that the population distribution of bag
Need answer
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Statistics Question

03/06/15

Statistics- How to Find P-Value on this question
A researcher wanted to determine if carpeted rooms contain more bacteria than uncarpeted rooms. The table shows the results for the number of bacteria per cubic foot for both types of... more
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