Mathematics problem solving
178175 questions • Page 107 / 3564
1) A simulation model of a precision manufacturing plant was developed to invest
1) A simulation model of a precision manufacturing plant was developed to investigate different scheduling rules. To validate the model, the regular weekly schedule was incorporat…
1) A smoke detector uses two devices A and B. If smoke is present the probabilit
1) A smoke detector uses two devices A and B. If smoke is present the probability that it will be detected by device A is 0.95, the probability it will be detected by device B is …
1) A spherical snowball is melting in such a way that its radius is decreasing a
1) A spherical snowball is melting in such a way that its radius is decreasing at rate of 0.2 cm/min. At what rate is the volume of the snowball decreasing when the radius is 8 cm…
1) A spherical weather balloon is being inflated. The radius of the balloon is i
1) A spherical weather balloon is being inflated. The radius of the balloon is increasing at the rate of 4 cm/s. Express the surface area of the balloon as a function of time t (i…
1) A spring hangs vertically. A weight of 10 lbs. is attached and the spring str
1) A spring hangs vertically. A weight of 10 lbs. is attached and the spring stretches 2 inches. The weight is replaced by a 650 lbs. weight and allowed to come to rest in equilib…
1) A state lottery game requires that you pick 6 numbers correctly from 1 to 99.
1) A state lottery game requires that you pick 6 numbers correctly from 1 to 99. (a) How many ways are there to choose 6 numbers if order is not important? (b) How many ways are t…
1) A steel ball weighing 128 pounds is suspended from a spring, whereupon the sp
1) A steel ball weighing 128 pounds is suspended from a spring, whereupon the spring is stretched 2 feet from its natural length. The ball is started in motion with no initial vel…
1) A street light is at the top of a 19 ft tall pole. A woman 6 ft tall walks aw
1) A street light is at the top of a 19 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 5 ft/sec along a straight path. How fast is the tip of her shadow …
1) A street light is at the top of a 20 ft tall pole. A woman 6 ft tall walks aw
1) A street light is at the top of a 20 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 5 ft/sec along a straight path. How fast is the tip of her shadow …
1) A student takes a quiz that consists of 190 questions, where he guesses on ea
1) A student takes a quiz that consists of 190 questions, where he guesses on each questions. According to the given information, which of the following is the mean value of corre…
1) A study finds that during blizzards, online sales are highly associated with
1) A study finds that during blizzards, online sales are highly associated with the number of snow plows on the road; the more plows, the more online purchases. The director of an…
1) A study of the effects of caffeine asked volunteers to take a memory test 2 h
1) A study of the effects of caffeine asked volunteers to take a memory test 2 hours after drinking soda. Some drank caffeine-free cola, some drank regular cola (with caffeine), a…
1) A study of the effects of caffeine asked volunteers to take a memory test 2 h
1) A study of the effects of caffeine asked volunteers to take a memory test 2 hours after drinking soda. Some drank caffeine-free cola, some drank regular cola (with caffeine), a…
1) A study to determine the sensitivity and specificity of a new test for macula
1) A study to determine the sensitivity and specificity of a new test for macular degeneration is conducted on 2430 people. Macular degeneration occurs at a rate of 16.72%. Your s…
1) A study was conducted with vegetarians to see whether the number of grams of
1) A study was conducted with vegetarians to see whether the number of grams of protein each ate per day was related to diastolic blood pressure. The data are given here. If there…
1) A study was performed examining epidurals as one factor that might inhibit su
1) A study was performed examining epidurals as one factor that might inhibit successful breastfeeding of newborn babies. Suppose a broader study included several additional issue…
1) A subgroup selected from a group of all subjects under study is called a(n) .
1) A subgroup selected from a group of all subjects under study is called a(n) ...... 2)The group of all subjects under study is called: a(n) ..... 3)A parameter is a numerical me…
1) A successful basketball player has a height of 6 feet 11 inches. Based on sta
1) A successful basketball player has a height of 6 feet 11 inches. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations i…
1) A successful basketball player has a height of 6 feet 11 inches. Based on sta
1) A successful basketball player has a height of 6 feet 11 inches. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations i…
1) A survey of 100 businesses revealed that the mean after-tax profit was $80,00
1) A survey of 100 businesses revealed that the mean after-tax profit was $80,000 and the standard deviation was $12,000. Determine the 90% confidence interval estimate of the mea…
1) A survey was given to a group of 12 seniors in high school about how much mon
1) A survey was given to a group of 12 seniors in high school about how much money they spent last weekend. The results are below: $45 $30 $15 $105 $35 $50 $15 $40 $45 $75 $60 $50…
1) A system may make two types of errors. Let A denote the event that the system
1) A system may make two types of errors. Let A denote the event that the system makes a type 1 error, and B denote the event that the system makes a type 2 error. Suppose that th…
1) A system may make two types of errors. Let A denote the event that the system
1) A system may make two types of errors. Let A denote the event that the system makes a type 1 error, and B denote the event that the system makes a type 2 error. Suppose that th…
1) A tank contains 2960 L of pure water. Solution that contains 0.09 kg of sugar
1) A tank contains 2960 L of pure water. Solution that contains 0.09 kg of sugar per liter enters the tank at the rate 6 L/min and is thoroughly mixed into it. The new solution …
1) A tank in the shape of an inverted right circular cone has height 10 meters a
1) A tank in the shape of an inverted right circular cone has height 10 meters and radius 19 meters. It is filled with 6 meters of hot chocolate. Find the work required to empty …
1) A tank is takingartillery practice on Ft. Bliss Army Base. It fires shells at
1) A tank is takingartillery practice on Ft. Bliss Army Base. It fires shells at anangle so that the shells trajectories follow the parabolaf (x) = -0.002x2 +4x; where xis horizon…
1) A test of significance was performed using alpha = 5%. The P-value was 4% and
1) A test of significance was performed using alpha = 5%. The P-value was 4% and the power was 85%. What is the probability of a Type II error for this test? 15%, 5%, or 4%? 2) Tr…
1) A traveling book salesperson has five copies of a certainstatistic book, four
1) A traveling book salesperson has five copies of a certainstatistic book, four copies of a certain geometry book, and threecopies of a certain calculus book. If these books are …
1) A traveling book salesperson has five copies of a certainstatistic book, four
1) A traveling book salesperson has five copies of a certainstatistic book, four copies of a certain geometry book, and threecopies of a certain calculus book. If these books are …
1) A truck driver is paid on a per-mile basis. He wants to develop a formula to
1) A truck driver is paid on a per-mile basis. He wants to develop a formula to forecast how much money he will earn (or loose) in each trip. He estimates that diesel fuel costs $…
1) A university Chancellor wants to investigate the relationship between student
1) A university Chancellor wants to investigate the relationship between students' method of transportation and self-esteem. His research team randomly selects 300 students and ra…
1) A well-designed and safe workplace can contribute greatly to increased produc
1) A well-designed and safe workplace can contribute greatly to increased productivity. IT is especially important that workers not be asked to perform tasks, such as lifting, tha…
1) A(n) _____ random variable counts successes in a fixed number of independent,
1) A(n) _____ random variable counts successes in a fixed number of independent, identical trials of a success/failure experiment. a. poisson b. geometric c. hypergeometric d. exp…
1) A) An article on IMBD commented that the mean number of movies owned (either
1) A) An article on IMBD commented that the mean number of movies owned (either in DVD or digital form) by college students was 14, with a standard deviation of about 6. An intere…
1) A) Interpret the coefficients of the independent variables in the following l
1) A) Interpret the coefficients of the independent variables in the following linear regression log(price) = 2.1 + 0.1*distance + 1.5*value B) Interpret the coefficients…
1) A) The label of a certain brand of 1-ounce chocolate chip cookies states that
1) A) The label of a certain brand of 1-ounce chocolate chip cookies states that the cookies contain 100 calories. To make sure that the claim is not exceeded, a quality engineer …
1) A.0.110 B.0.064 C. 0.031 D.0.01 E.0 2) A machine is rolling a metal cylinder
1) A.0.110 B.0.064 C.0.031 D.0.01 E.0 2) A machine is rolling a metal cylinder under pressure. The radius of the cylinder is decreasing at a constant rate of 0.05 cm/sec and the v…
1) According to Model 1, the average increase in sales (in million) per quarter
1) According to Model 1, the average increase in sales (in million) per quarter is (Give your answer in million with 2 decimal places.) 2) In Model 1, test H0:?1=0H0:?1=0, Ha:?1?0…
1) According to a particular survey of 1,400 dog owners, approximately 61% of al
1) According to a particular survey of 1,400 dog owners, approximately 61% of all American dog owners are owners of only one dog. Identify the population of interest and sample in…
1) According to a study done by De Anza students, the height for Asian adult mal
1) According to a study done by De Anza students, the height for Asian adult males is normally distributed with an average of 66 inches and a standard deviation of 2.5 inches. Sup…
1) According to a survey in a country, 37% of adults do not have any credit card
1) According to a survey in a country, 37% of adults do not have any credit cards. Suppose a simple random sample of 400 adults is obtained. A) Describe the sampling distribution …
1) According to chebyshev\'s rule, at least what percent of the observations in
1) According to chebyshev's rule, at least what percent of the observations in a sample are contained within 2 standard deviations around the mean regardless of the shape of the d…
1) Acessor and mutators are A. instance variables of a class B. used to access a
1) Acessor and mutators are A. instance variables of a class B. used to access and modify field variables of a class from outside the class C. constructor methods 2) Accessor meth…
1) Addison is trying to make money to help pay for college by selling sandwiches
1) Addison is trying to make money to help pay for college by selling sandwiches from a cart at the stadium during ball games. She pays the stadium $35 per night for the use of th…
1) After looking at the effect of sample size on standard error of the mean, ass
1) After looking at the effect of sample size on standard error of the mean, assuming the same population standard deviation, what is the best conclusion? http://imgur.com/a/SqS1s…
1) Age Category Team {18-20} {21 – 2 5} {26-30} Above 30 JumpingHigh (JH) 6 10 1
1) Age Category Team {18-20} {21 – 25} {26-30} Above 30 JumpingHigh (JH) 6 10 11 8 SpeedySkies (SS) 3 5 8 20 WinterFun (WF) 18 10 11 6 Give the literal formula first (not with…
1) Although there are exceptions, a value of r in excess of .50, in either a pos
1) Although there are exceptions, a value of r in excess of .50, in either a positive or negative direction, would represent a) an unimportant relationship in most areas of beh…
1) An Op-Amp is powered with a single 12V supply. If Vin(-) = 5V and Vin(+) = 3V
1) An Op-Amp is powered with a single 12V supply. If Vin(-) = 5V and Vin(+) = 3V, what is the output voltage if there is no feedback resistor, Rfb? 2) An Op-Amp is connected in th…
1) An account with interest compounded annually and an APR of 2.5% increases in
1) An account with interest compounded annually and an APR of 2.5% increases in value each year by a factor of A) 1.0025 B) 1.25 C) 1.025 2) True or False: My money will…
1) An article in Solid State Technology, \"Orthogonal Design for Process Optimiz
1) An article in Solid State Technology, "Orthogonal Design for Process Optimization and its Application to Plasma Etching" by G. Z. Yin and D. W. Jillie (May 1987) describes an e…
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