945 Answered Questions for the topic Statistics Question

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
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

03/17/15

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

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

03/06/15

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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Statistics Question Statistics Distribution

03/06/15

Statistics problem about large samples and normal distribution
A researcher has collected a large sample of IQ scores from his friends and relatives. He claims that because his sample is large and the distribution of his sample scores is very close to the bell... more
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Statistics Question

03/03/15

probability question
In a particular game players spin a circular spinner split into 3 unequal regions. Half of the spinner is colored orange. A quarter of the spinner is green and the remaining quarter is blue. A) if... more
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Statistics Question Math Word Problem

03/01/15

true or false, For a population with a mean of 80 and a standard deviation of 10, only 2.28 percent of the scores are greater than X = 100. True
Social Statistics   
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Statistics Question

02/25/15

Chi Square
At a school pep rally, a group of sophomore students organized a free raffle for prizes. They claim that they put the names of all of the students in the school in the basket and that they randomly... more
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Statistics Question

02/24/15

Approximately 2.5% of the bags collected would contain more than ___ Pints?
After a blood drive, the volumes of 440 bags of blood are measured. They are found to have a mean volume of 1 pint within standard deviation of 0.05. Approximately 2.5% of the bags collected would... more
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Statistics Question

02/22/15

probability
tossing heads in a coin toss and rolling a 6 on a die independent or dependent event  
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Statistics Question

02/22/15

Estimate the median and standard deviation for the salaries of employees of a certain company summarized below:
Salary ($)                       Employees 5,001 - 10,000                         16 10,001 - 15,000                       15 15,001 - 20,000                       11 20,001 - 25,000          ... more
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Statistics Question Z Score And Probability

02/21/15

z score and probability
suppose a bell shaped distribution, with a mean of 70 mph and a std dev of 8 mph. Calculate the Z score for someone traveling 95 mph. Is it likely to see someone going this fast? We must use Excel... more
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