945 Answered Questions for the topic Statistics Question

Statistics Question

03/17/14

College Women/ Mothers Height Question
Are college women are taller on average than their mothers. The results (in inches) were as follows: Pair             1  2   3   4  5Daughter    66 64 64 69 66Mother       66 62 65 66 63a. Define... more
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Statistics Question

03/16/14

when a dime is tossed 3 times eight likely outcomes are possible. let a=event the first toss is heads, b=third toss is tails and c=event the total number is one
compute P(C/A) and are A and C independent events and why?
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Statistics Question

03/16/14

find the number of weaving errors in a 20 by 10 foot rug
Find the number of weaving errors in a 20 by 10foot rug. What is the probability of finding at least 3 errors in the rug???    this is all the information given. The chapter is on discrete random... more
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Statistics Question

03/07/14

Why is it important to learn statistics in the study of Psychology?
Why is it important to learn statistics in the study of Psychology?    
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Statistics Question

02/25/14

How can I find the least-square regression line?
If I was given this data how can I find the least squares regression line:   x = 21   y= 78   sx = 1.5   sy= 0.8   r=0.81
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Statistics Question Standard Deviation

02/22/14

What is the minimum "usual" value equal beats per minute?
A certain group of tests subject had pulse rates with a mean of 77.1 beats per minute and standard deviation of 12.6 beats per minute. Would it be unusual for one of the test subjects to have a... more
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Statistics Question

02/22/14

Find the marginal distribution of age group
Age group 15 to 19 years, 2124 Females and 1876 Males
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Statistics Question

02/19/14

If a stemplot showed the following numbers of pizza pieces eaten by a contestants:
08, 17, 19, 25, 27, 29, 30, 32, 35, 37, 39, 39, 41, 42, 46, 53, 57, 63 What percent of contestants ate more than 50 pieces of pizza?
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Statistics Question

02/19/14

The five number summary for the length of duration (in minutes) of a volcano eruption is 1.7, 2.3, 4.0, 4.4, 5.2.
  What percent of the eruptions last longer than 2.3 minutes?
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Statistics Question

02/19/14

A national achievement test is administered annually to 5th graders.
The test scores are normally distributed with a mean of 100 and a standard deviation of 15.  If Tom's standardized score is 1.23, what was his approximate score on the test?  Round to the whole... more
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Statistics Question

02/19/14

SAT Math scores have a Normal Distribution N(515, 114).
 If a student wants a score in the top 20% of SAT Math scores, he must score at least ____________.
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Statistics Question

02/19/14

Vivian earned a score of 940 on a national achievement test.
 The mean test score was 850 with a standard deviation of 100.  What porportion of students had a higher score than Vivian? (Assume that test scores are normally distributed.)
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Statistics Question

02/18/14

normal distribution that has a mean of 100,
A. For a normal distribution that has a mean of 100, and a standard deviation of 8, determine the Z-score for each of the following X values:1 B. Use the information in 1 A. to determine the area... more
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Statistics Question Statistics

01/15/14

When do you use the formulas of the Coefficient of Variation?
When do you use the formulas of the Coefficient of Variation? Can you set an example to justify your answer?
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Statistics Question Statistics

01/14/14

Statistics Questions
1. How do you solve for median if the given data is even? For example: 3,1,2,3,1,1 (these given data is even.) 2. When do you use the formula n+1/2 (for odd number) and n+2/2 (for even numbers)?... more
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Statistics Question

12/23/13

Test the hypothesis that the mean days of recovery is not different among treatment types at a = 0.01.
Pill          3.9   1.4   4.1     5.5   2.3Syrup      5.4     2    4.8    3.8    3.5Sleep       1.3  0.7   2.2     1.4   2.1 Anova: Single Factor SUMMARY  Groups       Count      Sum     ... more
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Statistics Question

12/20/13

.relationship between hours studied to the test scores. predict the test score if a student studied 4.5 hours. s.

Hours Studied     Test Score   135.8                      6167        there are 24 rows for each         ave 5.658                 256.958      Coefficient  (b1)-98.944374816.8186Intercept... more
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Statistics Question

12/18/13

Find the slope and the y-intercept for the line that passes through (-7,-12) (3,12)
Find the slope and the y-intercept for the line that passes through (-7,-12) (3,12)
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Statistics Question

11/29/13

maths statistics
A random sample of students at university was interviewed todetermine the amount of time that they spend on Facebook andto consider whether the average had changed from its previous level       The... more
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Statistics Question

11/24/13

Statistics questions
The mean incubation time for a type of fertilized egg is 19 days.  Suppose the incubation times are approximately normally distrubuted with a standard deviation of 1 day. What is the probability a... more
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Statistics Question

11/13/13

The following were the grades obtained by 50 medical stds in their practicum in 1978. GRADE 1 2 3 4 5 6 7 8 9 FREQUENCY 4 8 7 12 4 9 3 1 2
The following were the grades obtained by 50 medical stds in their practicum in 1978. FREQUENCY    GRADE 4                             1 8                             2 ... more
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Statistics Question

11/13/13

The following are the ages in years of 40 stds who went on an excursion 12,13,14,12,15,14,13,16,14,15,13,14,14,15,16,12,13,14,15,15,15,13,12,15,16,14,15,15,
The following are the ages in years of 40 stds who went on an excursion 12,13,14,12,15,14,13,16,14,15,13,14,14,15,16,12,13,14,15,15,15,13,12,15,16,14,15,15, 13,14,12,13,15,15,16,16,12,14,15,14, a)... more
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Statistics Question

11/12/13

ASSUMING THAT AN ACURA TSX REQUIRES A CHANGE IN TIMING BELT A 90,000 MILES WITHIN A DEVIATION OF 8,000 MILES.
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Statistics Question Statistics Normal Curve

11/12/13

Find the value of x so that the area under the normal curve is between...
EDIT: μ = 200 and σ = 25.   1. Find the value of x so that the area under the normal curve between μ and x is .4525 and the value of x is less than μ.   2. Find the value of x so that the area... more
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Statistics Question

11/02/13

Statistics Question?
The technical support call center for a software company has a mean wait time of 210 seconds, with a standard deviation of 40 s. The management team wants to continue to improve customer... more
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