Pre-Calculus

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A sample of 800 computer chips revealed that 72% of the
A sample of 800 computer chips revealed that 72% of the chips fail in the first 1000 hours of their use. The company's promotional literature claimed that under 76% fail in the first 1000 hours of the… read more
Kofi
PhD in Statistics
Ph.D.
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A contractor buys ten 100 lb bags of cement from Lowes. To
A contractor buys ten 100 lb bags of cement from Lowes. To make sure he gets his money's worth, he weighs the ten bags with following results. 99.1 98.4 99.8 98.4 100.4 100.5 99 98.5 100.2 101.2 (a) W… read more
rajeevanpillai
Master's Degree
Master's Degree
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Suppose the National Transportation Safety Board (NTSB)
Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of three different kind of cars. NTSB collects a random sample of three for each of the cars types. In this hypothet… read more
Kofi
PhD in Statistics
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The average production of peanuts in Virginia is 3150 pounds
The average production of peanuts in Virginia is 3150 pounds per acre A new plant food has been developed and is tested on 64 individual plots of land. The mean yield with the new plant food is 2980 p… read more
R.R. Jha
Bachelor's Degree
Bachelor's Degree
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Are these teams studying in average the same amount of hours
Are these teams studying in average the same amount of hours at .10 significance level?Team A: Average number of extra hours: 18 hours; standard deviation = 2.5 hours; n = 10 Team B: Average number of… read more
Kofi
PhD in Statistics
Ph.D.
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Research subjects were followed from adolescence to
Research subjects were followed from adolescence to adulthood, and all the people in the sample were categorized in terms of whether they were obese or whether they were dating, cohabitating, or marri… read more
R.R. Jha
Bachelor's Degree
Bachelor's Degree
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Star Magazine reports that celebrity Twitter accounts have
Star Magazine reports that celebrity Twitter accounts have an average of 4 million followers. Blogger Perez Hilton believes that the true average number of Twitter followers for celebrities is signifi… read more
R.R. Jha
Bachelor's Degree
Bachelor's Degree
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An insurance company claims the average car on the road is
An insurance company claims the average car on the road is less than 6 years old. Based on a random sample of 15 cars, the mean age is 5.8 years with a standard deviation of 1.1 years. Does the sample… read more
akch2002
Master's Degree
3,055 satisfied customers
A pet store currently has a total of 45 cats and dogs. There
A pet store currently has a total of 45 cats and dogs. There are 7 more cats than dogs. Find the number of cats and dogs in the store. Write and solve a system of equations that represents the situati… read more
Sandhya_sharma
Master's Degree
Master's Degree
1,101 satisfied customers
I need an answer to this question. I don't know how to do
Hello, I need an answer to this question. I don't know how to do it: Employers in a large manufacturing plant worked an average of 62:0 hours of overtime last year, with a standard deviation of 15:0 h… read more
GLENN GILONGOS
Master of Mathematics
637 satisfied customers
Question 1 of 40 2.5 Points A consumer group claims that the
Question 1 of 40 2.5 Points A consumer group claims that the mean running time for a certain type of flashlight battery is not the same as the manufacturer's claims. Determine the null and alternative… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Question 1 of 40 2.5 PointsA two-tailed test is conducted
Attachment: 2015-03-11_174342_question_1_of_40_exam_8_07.docx Question 1 of 40 2.5 Points A two-tailed test is conducted at the 5% significance level. What is the P-value required to reject the null h… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
I see where you have already answered a homework assignment the same as this. Please let me know what the charge will be to get the answers. Questions 1 to 20: Select the best answer to each question.… read more
R.R. Jha
Bachelor's Degree
Bachelor's Degree
11,367 satisfied customers
"For John Only " Hi John.. I noticed you have answered
"For John Only " Hi John.. I noticed you have answered similiar questions to the ones I would like for you to help me with. Hopefully you will be able to. 1. The commissioner of the state police is re… read more
Math-John
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FOR SCOTT ONLY, Hey scott can we do both those mathlabs
FOR SCOTT ONLY, Hey scott can we do both those mathlabs tmrw at around 6:30 EST so I can knock them out before my wedding this weekend? Let me know buddy thank you… read more
Scott
Master's Degree
16,093 satisfied customers
FOR SCOTT ONLY, Scott think you can have this for me today?
FOR SCOTT ONLY, Scott think you can have this for me today? Seems pretty simple just matching things up...Also are you free tonight to do the math lab stuff for this week same time as usual like 6:15 … read more
Scott
Master's Degree
16,093 satisfied customers
A grandmother is looking for a plan to finance her new grandchilds
A grandmother is looking for a plan to finance her new grandchild's college education. She has \$50,000 to invest. Search the internet and locate a long-range investment plan, CD, Savings Bond, etc, fo… read more
Stevewh
Teacher
Bachelor's Degree
6,427 satisfied customers
HO: µ = 70 H1: µ > 70 σ = 20, n = 100, xbar = 80, α = .01 a)
HO: µ = 70 H1: µ > 70 σ = 20, n = 100, xbar = 80, α = .01 a) calculate the value of the test statistic b) set up the rejection region. c) determine the p-value d) interpret the results… read more
Chirag
Master's Degree
10,329 satisfied customers
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