# Statistics And Probability

All new and solved questions in Statistics And Probability category

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##### Need help
?x=8/(-2-(-4))^2...
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##### Please guys im clueless I need someone to break this down for me
I. Based on the information given below in regarding to one product, please answer:Fixed Costs $15,000.00 per yearVariable Costs$1.00 per unitRevenue \$1.60 per unitDesign Capacity 45000 units per yearEffective Capacity 40000 units per yearAnticipated Output 36000 units per year(a). What is the brea...
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##### Question from Hogg - Probability & Statistical Inference
Question #8 from section 1.2. I've read through the section and yet they use some formula i've never seen before. First of all, here is the question: If P(A) = 0.4, P(B) = 0.5 and P(A n B) = 0.3.Finda) P( A U B )b) P( A U B' )c) P(A' U B' )I understood how to find part a) that wa...
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##### Probability 6
In doing market research for a candy company, John find that 1054 of 1220 randomlyselected person like dark chocolate. Based this result, construct a 90% C.I. for the percentage of all persons who like dark chocolate....
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##### Stats probability homework question
A survey found that women’s heights are normally distributed with mean 63.6 in and standard deviation 2.5 in. A branch of the military requires women’s heights to bebetween 58 in and 80 in.Find the percentage of women meeting the height requirement.If tis branch of the military changes t...
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##### Help me in Combiantorics! ;) Thanks
The average number of oil tankers arriving each day at a certain port city is known to be 10. The facilities at the port can handle at most 15 tankers per day. What isthe probability that the port is unable to handle all the tankers that arrive on a given day and on one of the next 3 days?...
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##### Indicated Critical Value?
Find the indicated critical value.Z 0.07=Round to two decimal places as needed...
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##### Two dependent data sets
The two data sets are dependent. Find to the nearest tenth.x 8.3 5.6 8.2 9.5 6.8 5.7y 9.1 7.7 9.8 8.5 8.1 9.3a. -1.4b. -0.8c. -1.8d. -8.4...
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##### Probability!?!
Assume the readings on thermometers are normally distributed with a mean 0*C and a standard deviation of 1.00*C.Find the probability that a randomly selected thermometer reads less than 0.14(round to four decimal places as needed)...
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##### Find the Probability - I will vote best answer if it's right please do not guess!
Assume that adults have IQ scares that are normally distributed with a mean of 105 and a standard deviation of 20. Find the probability that a randomly selected adulthas an IQ less than 141.The probability that a randomly selected adult has an IQ less than 141 is ___.(Type an integer or decimal roun...
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##### Find critical values for a two tailed test
When performing a hypothesis test for the ratio of two population variances, the upper critical F value is denoted FR. The lower critical F value, FL, can be found asfollows: interchange the degrees of freedom, and then take the reciprocal of the resulting F value found in table A-5. FR can be denot...
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##### A) probability that the adults consume both coffee and soda B) Probability adult doesnt consume...
Suppose that 45% of all adults regularly consume coffee, 50% regularly consume carbonated soda, and 60% regularly consume at least one of these two products....
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##### A company had 80 employees whose salaries are summarized in the frequency distribution below....
A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. Find the standard deviation of the datasummarized in the given frequency distribution....
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##### Tend to decrease the value of the t statistic (make it closer to zero)?
tend to decrease the value of the t statistic (make it closer to zero)?...
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##### Statistics
What is the area under the normal curve between z = -1.0 and z = -2.0?...
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##### T test
A set of 10 random sample scores is collected: 10, 16, 5, 9, 9, 11, 8, 12, 10, and 9.a. With alpha set at .05, determine whether this sample could be representative of apopulation whose parameter mean is known to be 8.13....
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##### Geometric or possion?3
find the indicated pobabalilityusing either the geometric or possion distribution, then determine if the events are unsusaual if convenentassume that you will make a sale on every telephone call is 0.17. find the probabaility that you will make a sale on the fith call,...
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##### Poisson Distribution Part 1
Historically, a textile company samples 3 sheets of a certain material as part of incoming inspectionand the historical 10.5 blemishes are found on average.If a sample of one sheet of this material is tested, based on the Poisson distribution:a) How many blemishes should be found on average in this ...
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##### Distribution with a mean,median,and mode equal to 90 is
A distribution with a mean, median, and mode equal to 90 is...
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##### Distributions problems
The life of an automotive battery is normally distributed with mean 900 days and standard deviation 35 days. What fraction of these batteries would be expected tosurvive beyond 1000 days.Answer: Pr{x>1000}=0.0021How you get to this number? Im studying different distributions try to explain it in ...