1,058 Answered Questions for the topic Statistics Question

Statistics Question

11/17/15

From a random sample of size 14, one has calculated the 95.0% confidence interval for µ and obtained the result (15.3, 27.1).
(a) What were the Upper X overBar and s for that sample.   (b) Calculate a 98.0% confidence interval for μ . Round your answer to 2 decimal places.(two answers for this problem)
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11/16/15

needs to be answered ASAP please
harry needs to write christmas cards, however he can only write lists in these 2 ways   girl                 boy boy                girl girl                 boy   if there are 10 girls and... more
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11/14/15

An MP3 player is loaded with 50 musical selections: 20 rock selections, 13 jazz selections, and 17 blues selections.
The player is set on random play, so selections are played randomly and can be repeated . Determine the probability of each of the following outcomes. (a) The first four selections are all... more
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Statistics Question Math Statistics Mathmatics

11/13/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request
It is estimated that 3.2% of the general population will live past their 90th birthday. In a graduating class of 737 high school seniors, find the following probabilities. (Round your answers to... more
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Statistics Question Statistics Stats

11/12/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request
What are the chances that a person who is murdered actually knew the murderer? The answer to this question explains why a lot of police detective work begins with relatives and friends of the... more
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Statistics Question Statistics Stats

11/12/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request
Ocean fishing for billfish is very popular in the Cozumel region of Mexico. In the Cozumel region about 46% of strikes (while trolling) resulted in a catch. Suppose that on a given day a fleet of... more
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Statistics Question

11/12/15

if 1.5% of the bolts made by an automotive factory are defective, what is the probability that in a shipment of 20 bolts, there are 4 or less defective bolts?
i have an answer but im not sure if its the correct one
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Statistics Question

11/09/15

if you have 8 pennies in your pocket, and you pull the coins out of your pocket 1 at a time, what is the probablility that they are taken out in order by date.
if you have 8 pennies in your pocket dated, 1972, 1978, 1979, 1985, 1989, 1991, 1993, and 1995. if you take the coins out of your pocket 1 at a time,  what is the probablility that they are taken... more
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Statistics Question

11/09/15

Statistic question over Sampling Distribution (I think)
A poll asked 40 Americans, "How many hours of TV do you watch each week?" Results of the survey indicated that x(With a bar on top)=15 and s=8.3. Construct a 99% confidence interval for the... more
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Statistics Question

11/09/15

18% of seniors intend to major in computer science in college. If 6 seniors are randomly selected find the probability half will major in comp. science
18% of seniors intend to major in comp science. If 6 are selected find probability half will major in it.
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Statistics Question

11/08/15

Statistics Question (Find the z value corresponding to each of the following)
Find the z value corresponding to each of the following: a) Area to the right of the z value is 0.2743 b) Area to the left of the z value is 0.9965 c) Area to the right of z and to the left of... more
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Statistics Question

11/08/15

A student takes a 32-question multiple-choice exam, but didn't study and randomly guesses each answer.
Each question has three possible choices for the answer. Find the probability that the student guesses more than 60% of the questions correctly. What would the probability be that the student... more
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Statistics Question

11/08/15

statistics
consider a die is rolled once determine the following probabilities. 1.event of rolling a 2 2.event of getting an even number 3.event of getting a number less than 7 4.event of rolling a... more
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Statistics Question Statistics Stats Probability Stats

11/05/15

Z-score Stats question
I have no idea evn how to start this question  The average Demand for renatl skis on winter Saturdays at a particular area is 150 pairs which has been quites stable over time. There is variation... more
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Statistics Question

11/05/15

When you divide the number of permutations of 11 objects taken 3 at a time by? 3!, you will get the number of combinations of 11 objects taken 3 at a time
Statistic question
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Statistics Question

11/05/15

Statistics
Use technology and the given confidence level and sample data to find the confidence interval for the population mean muμ. Assume that the population does not exhibit a normal distribution.Weight... more
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Statistics Question Probablitly

11/04/15

if P(A^c)=80% , then P(A and A^c) is equal to?
Statistics and probability. 
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Statistics Question

11/03/15

For 1 week, a medical student records the diastolic pressure reading of each person who uses the machine between the hours of 10 A.M. And 2 P.M.,
With the following results: N = 114, ∑ X = 9,561.2, ∑ X2 = 678,360.92. a. How many of the samples had scores of 110 or higher? b. What was the probability of a score of 60 or less? c. If the... more
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Statistics Question

11/03/15

Math statistics case study :(
Probability Distribution of the Number of Families per Parish of German Immigrants on Board the 1752 Voyage of the St. Andrew     # of families                                        ... more
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Statistics Question

11/02/15

Find the probability
90% of married women claim to dislike their mother-in-laws. Suppose 8 married women are out to lunch. What is the probability that 5 of them dislike their mother-in-law
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Statistics Question

11/02/15

need help. show the steps
A psychic network recieved telephone calls last year from over 1.5 million people. A recent article attempts to shed some light onto the credibility of the psychic network. one of the psychic... more
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Statistics Question

11/02/15

Statstics. Can you show me by steps?
In the American version of the Game Roulette, a wheel has 18m black slots, 8 red slots and 2 green slots.  all slots are the same. a person can wager on either red or black. green is reversed for... more
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Statistics Question

11/02/15

10 person Focus Group with a mean of 4.8 and standard deviation of 0.73 of people who recognize name brands
focus groups of 10 people are randomly selected to discuss products of the Famous company. it is determined that the mean number (per group) who recognize the famous brand name is 4.8, and the... more
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Statistics Question

10/31/15

I've done a t-test in excel and get .013. How do I determine if this is statistically significant?
I am trying to see if two separate groups of students have scored significantly different on a test. I've done a t-test in excel and get .013. How do I determine if this is statistically significant?
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Statistics Question

10/29/15

License plates are made using 2 letters followed by 2 digits. How many plates can be made if repetition of letters and digits is allowed
I need help
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