945 Answered Questions for the topic Statistics Question

Statistics Question

05/04/18

Briefly explain the benefits of stratification
this question is based on sampling concepts in survey work
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Statistics Question

05/01/18

A probability question
This is a conditional probability question I am struggling to solve and understand. Any insight would be so very useful.  Here is the problem: A five digit number is formed from the digits... more
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04/27/18

To find the Mean and Standard Deviation
Total amount of time (x, in minutes) spent commuting by the entire 240 residents of a housing area was recorded.   Given that total x = 10,980 and total ( x - µ )² = 23,191. Compute the mean and... more
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Statistics Question

04/25/18

Statistics question
a candidate must win 263 of the total of 523 votes in an electoral college. Let's suppose that the largest region gets 52 votes. Assuming that a candidate wins this region, the number of additional... more
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Statistics Question

04/25/18

Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal place
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) μ = 14.2; σ = 3.2 P(8 ≤ x ≤ 12)... more
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Statistics Question

04/24/18

what is the probability that a single car of this model emits more than 0.07 g/mi of NOX?
I need help please.
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Statistics Question

04/22/18

Average monthly electric bill
An electric company found the relationship between house size (x, in square feet) and monthly electric bill (y, in dollars) is given by yˆy^ = 0.03x + 18.50. Use this least squares line to predict... more
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Statistics Question

04/22/18

How large a sample n would you need to estimate p with margin of error 0.04 with 95% confidence? Assume that you don't know anything about the value of p.
A local board of education conducted a survey of residents in the community concerning a property tax levy on the coming local ballot. They randomly selected 850 residents in the community and... more
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Statistics Question

04/18/18

a die is rolled 10 times what is the chance of obtaining exactly 2 sixes
 This question is based off of a problem set given by my instructor.
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Statistics Question

04/12/18

Order Statistic
I have had hard time figuring out how to convert the uniform order statistic pdf into a beta distribution like how alpha and beta are determined.   If you answer this question, that would be... more
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Statistics Question Statistics

04/09/18

In order to get accepted into graduate school, you know you must score in the top 20% of scores on a standardized test.
If the test has a mean score of 800 and a standard deviation of 125, what is the lowest score you can achieve and still be admitted to the graduate school?
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04/09/18

Probability question for Stats class help.
Suppose that we have  15 marbles in a jar. 7 of them are green, 2 of them are blue, and the rest are red. 1)What is the probability that the first marble we draw is blue?2)Suppose you drew a blue... more
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Statistics Question

04/08/18

Mean score of 800 and a standard deviation of 100. If 15 students take the test what is the probability that 11 out of 15 will score between 600 and 850
The test is normally distributed.
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Statistics Question Paired T Test 1 sample t Interval

04/08/18

AP Statistics T- test
An institute hosted 10 French teachers for 4 weeks.  At the beginning of the period, the teachers were given the Modern Language Association's listening test of understanding of spoken French. ... more
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Statistics Question

04/08/18

A standardized test's scores are normally distributed with a mean a 500 and a standard deviation of 100.
If 1200 students take the test, how many would you expect to score over 650?Round your answer to the nearest whole number.
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Statistics Question

04/07/18

How many movies has a typical middle schooler seen in the theater this year
use this data set. 0,1,1,1,1,1,2,2,2,2,3,3,3,5,7,10,10
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Statistics Question

04/06/18

The following are speeds​ (mi/h) of cars measured with a radar gun. Determine the​ 5-number summary and boxplot for the data given below.
70   70   71   71     72   73   74  74 76   76 77 78 79 79 79
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Statistics Question And Statistics Answer

04/06/18

find the z-score for the standard normal distribution where: p(z<+9)=0.8980
this is the entire question there is nothing else to ad
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Statistics Question

04/03/18

statistic question
find the required sample size for sample to construct a 95% confidence interval for the population meant that has sampling error SE=0.25, and it is given that population standard deviation is 7.5
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04/02/18

There is a 88.4% chance that my value of x is 30 or greater. If I assume my data is normally distributed..
There is a 88.4% chance that my value of x is 30 or greater. If I assume my data is normally distributed, can I determine the likelihood that my value of x is 26, 27, 28, 29, 31, 32, 33, 34... more
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Statistics Question Math Cards Calculation

04/01/18

Statistics, please assist with break down... I received 1% as the answer.. is this correct?
A computer manufacturer uses graphic cards made by two companies N and I. They are using the cards made by N in 80% of the computers and made by I on 20% of the computers. They have found that 2%... more
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Statistics Question Statistics Stats

03/29/18

Find the value of the test statistic
I would really appreciate the help guys. Thanks again !   1)the claim is that the proportion of peas with yellow pods is equal to 0.25 the sample statistics from one experiment include 560 peas... more
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Statistics Question

03/28/18

helpmeplease
Two cards are drawn without replacement from a standard deck of 52 playing cards. What is the probability of choosing a queen for the second card drawn, if the first card, drawn without... more
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Statistics Question

03/25/18

an urn holds 4 pink marbles, 6 white marbles, and 5 purple marbles.
 a) If you pick a marble at random, what is the probability that it is white?
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Statistics Question Math Statistics Business Statistics

03/21/18

Statistics Question
The Price of a bond is uniformly distributed between $80 and $90.    a. What is the probability that the bond price will be greater than $83? b. What is the probability that the bond price will... more
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