Mathematics problem solving

1) Hendrix Lake is a small freshwater lake in Oklahoma. Water collected from thi

1) Hendrix Lake is a small freshwater lake in Oklahoma. Water collected from this watershed had the following chemical composition: Ca2+ = 1.7 mg/L; Mg2+ = 0.4 mg/L Na+ = 0.9 mg/L…

1) Here are the IQ test scores of 31 seventh-grade girls in a Midwest school dis

1) Here are the IQ test scores of 31 seventh-grade girls in a Midwest school district: 114 100 104 89 102 91 114 114 103 105 108 130 120 132 111 128 118 119 86 72 111 103 74 112 1…

1) How do you think the data was collected? 2) What fields in the Electronic Hea

1) How do you think the data was collected? 2) What fields in the Electronic Health Record were used to gather the information? Central line- associated bloodstream infections (CL…

1) How long will it take $10,000 to grow to $12,000 if the investment earns inte

1) How long will it take $10,000 to grow to $12,000 if the investment earns interest at the rate of 4%/year compounded monthly? (Round your answer to one decimal place.) 2) Find t…

1) How long would it take an investment to double under each of the following co

1) How long would it take an investment to double under each of the following conditions? (a) Interest is 3.2% compounded monthly. (Round your answer to three decimal places.) (b)…

1) How many may not end in 07 A) 2700 2) Classify the events as are drawn from a

1) How many may not end in 07 A) 2700 2) Classify the events as are drawn from a deck of playing cards and the irt cardi drawn. dependent or independent The A) 3) The random varia…

1) How much will you have accumulated over a period of 30 years if, in an IRA wh

1) How much will you have accumulated over a period of 30 years if, in an IRA which has a 10% interest rate compounded quarterly, you annually invest: a. $1 b. $4000 c. $10,000 d.…

1) How would a psychologist test the hypothesis that a new stress-reduction prog

1) How would a psychologist test the hypothesis that a new stress-reduction program really works? A) Try to reject the hypothesis that it does work. B) Try to accept the hypothesi…

1) How would you explain the results of your overall one-way ANOVA and Tukey Pai

1) How would you explain the results of your overall one-way ANOVA and Tukey Pairwise comparisons to a friend with very little knowledge of statistics? 2) From the results of a on…

1) I have a question about 2 problem: A circle C of radius 2pi and has a spiral

1) I have a question about 2 problem: A circle C of radius 2pi and has a spiral parametrized by r(t) = (tcost, tsint). Show that the tangent line to the spiral at the point where …

1) I invest $500 in a Savings Bond and earn $5 in interest every year for five y

1) I invest $500 in a Savings Bond and earn $5 in interest every year for five years at which point my balance is $525. What kind of interest did I earn? A) Compact Interest B) …

1) IQ is normally distributed with a mean of 100 and a standard deviation of 15.

1) IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual. a) ive the distribution of…

1) IQ is normally distributed with a mean of 100 and a standard deviation of 15.

1) IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual is randomly chosen. Let X = IQ of an individual. Find the probability that …

1) If 1900 square centimeters of material is available to make a box with a squa

1) If 1900 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. 2) A rancher wants to fence …

1) If Max receives an unemployment check, would you include that transfer paymen

1) If Max receives an unemployment check, would you include that transfer payment from the government in this year’s GDP? Why or why not? 2) In the following situations, explain w…

1) If a data center is using servers with 98% availability, how many of them wil

1) If a data center is using servers with 98% availability, how many of them will be needed to provide an infrastructure that is available 99.999% of the time? Justify your answer…

1) If a data center is using servers with 98% availability, how many of them wil

1) If a data center is using servers with 98% availability, how many of them will be needed to provide an infrastructure that is available 99.999% of the time? Justify your answer…

1) If a population has a mean of 100 and standard deviation of the mean of 4, wh

1) If a population has a mean of 100 and standard deviation of the mean of 4, what is the variance of the sampling distribution for N=50? A) 0.32 B) 0.5 C) 1 D) 32 2) What is the …

1) If an argument is valid and all of its premises are true in the actual circum

1) If an argument is valid and all of its premises are true in the actual circumstance, then it is sound. a) Only sometimes true. b) Never true. c) Always true. 2) Every tautology…

1) If an independent measures t statistic has df = 20, then there were 21 indivi

1) If an independent measures t statistic has df = 20, then there were 21 individuals participating in the research study. TRUE OR FALSE? 2) The homogeneity of variances assumptio…

1) If n = 5 and (pi) = 0.40, a) P(X) = 4 = 0.0768 b) P(X) 3 = 0.9130 c) P(X) < 2

1) If n = 5 and (pi) = 0.40, a) P(X) = 4 = 0.0768 b) P(X) 3 = 0.9130 c) P(X) < 2 = 0.3370 With 15 observations, a) the smallest of the standard normal quartile values covers an…

1) If n = 5 and (pi) = 0.40, what is the a) P(X) = 4? b) P(X) 3? c) P(X) < 2? d)

1) If n = 5 and (pi) = 0.40, what is the a) P(X) = 4? b) P(X) 3? c) P(X) < 2? d) P(X) > 1? 2) With 15 observations, a) the smallest of the standard normal quartile values co…

1) If the joint probability distribution of X and Y is given by f(x, y) = x + y

1) If the joint probability distribution of X and Y is given by f(x, y) = x + y 30 , for x = 0, 1, 2, 3; y = 0, 1, 2, find (a) P(X 2, Y = 1); (b) P(X > 2, Y 1); (c) P(X>Y );…

1) If the null hypothesis is false because of a sizable treatment effect, the va

1) If the null hypothesis is false because of a sizable treatment effect, the value of F tends to be a) considerably smaller than one. b) smaller than one. c) larger than one. d) …

1) If the null space and column space of a square matrix are orthogonal compleme

1) If the null space and column space of a square matrix are orthogonal complements of cach other, the natrix must be an orthogonal projection matrix. 5) The characteristic polyno…

1) If the relationship between y (a dependent variable) and x (an independent va

1) If the relationship between y (a dependent variable) and x (an independent variable) is curvilinear as suggested by a graph, the regression equation representing the curvilinea…

1) If the total cost function for a product is: C(x) = 250 + 6x + 0.1x 2 dollars

1) If the total cost function for a product is: C(x) = 250 + 6x + 0.1x2 dollars; find the minimum value for the average cost per unit. The minimum average cost per unit for this f…

1) If two stocks have positive covariance, which of the following statements is

1) If two stocks have positive covariance, which of the following statements is TRUE? A) If one stock doubles in price, the other will also double in price. B) The rates of return…

1) If we assume that the current cranial capacity in humans of an isolated popul

1) If we assume that the current cranial capacity in humans of an isolated population in South America is approximately normally distributed with a mean of 1400ml and a standard d…

1) In 1978, cars that got fuel mileage of 40 miles per gallon (mpg) were availab

1) In 1978, cars that got fuel mileage of 40 miles per gallon (mpg) were available in the US. If the average fuel economy of all passenger vehicles sold since 1978 was 40 mpg, ins…

1) In Texas car license plates are made up of one digit, three letters and then

1) In Texas car license plates are made up of one digit, three letters and then 3 digits. for example 4 HJK 851. it's not true, but assune that all numbers and letters could be us…

1) In a 1 hour Tv slot, one week\'s program stated with a 3 minute review of las

1) In a 1 hour Tv slot, one week's program stated with a 3 minute review of last week as a lead in. commercials took 30% of the total time for the slot. what percent of the total …

1) In a 22-year period, a particular location was hit by 46 major hurricanes. As

1) In a 22-year period, a particular location was hit by 46 major hurricanes. Assume that major hurricanes are independent of each other and that the mean number of hurricanes per…

1) In a batch of 48 shafts, there are 8 shafts that do not meet the length speci

1) In a batch of 48 shafts, there are 8 shafts that do not meet the length specifications. A sample of 4 shafts are selected at random (without replacement) and inspected. What is…

1) In a certain presidential election, Alaska\'s 40 election districts averaged

1) In a certain presidential election, Alaska's 40 election districts averaged 1,955.8 votes per district for a candidate. The standard deviation was 572.5. (There are only 40 ele…

1) In a completely randomized design, 12 experimental units were used for the fi

1) In a completely randomized design, 12 experimental units were used for the first treatment, 15 for the second treatment, and 20 for the third treatment. Complete the following …

1) In a family consisting of a mother, a father, and two childer of different ag

1) In a family consisting of a mother, a father, and two childer of different ages, (a) What is the pronanility that the family has two girls, given that one of the childern is a …

1) In a random sample of 49 audited estate tax returns, it was determined that t

1) In a random sample of 49 audited estate tax returns, it was determined that the mean amount of additional tax owed was $3453 with a standard deviation of $2537. Construct and i…

1) In a recent study of 35 ninth-grade students, the mean number of hours per we

1) In a recent study of 35 ninth-grade students, the mean number of hours per week they played video games was 16. The standard deviation of the population was 3.0. a. Find the be…

1) In a regression, the dependent variable and the independent variable must hav

1) In a regression, the dependent variable and the independent variable must have the same number of observations. True False 2) In linear regression, the coefficient is estimated…

1) In a simple game, a six-sided die is rolled 4 times. If all four rolls result

1) In a simple game, a six-sided die is rolled 4 times. If all four rolls result in either 1 or 2, then the player wins $50 dollars. If the player has to pay $10 to play the gam…

1) In a simple game, a six-sided die is rolled 4 times. If all four rolls result

1) In a simple game, a six-sided die is rolled 4 times. If all four rolls result in either 1 or 2, then the player wins $50 dollars. If the player has to pay $10 to play the gam…

1) In a study conducted recently 671 out of 1,070 people surveyed expressed pref

1) In a study conducted recently 671 out of 1,070 people surveyed expressed preference for chocolate ice cream over other flavors. Let p be the proportion of the population survey…

1) In a study of the cost per case of treating patients admitted with a disease

1) In a study of the cost per case of treating patients admitted with a disease of the digestive system, the following data wrere obtained: $5,000, $5,500, $9,000, $8,000, $10,500…

1) In an ANOVA F -test comparing multiple population means, (a) the rejection re

1) In an ANOVA F-test comparing multiple population means, (a) the rejection region is two-tailed. (b) if the null hypothesis is true, MSG is about the same as MSE. (a) and (b) no…

1) In an Engineering department at Stevens, there are 9 professors and 16 PhD st

1) In an Engineering department at Stevens, there are 9 professors and 16 PhD students. The department decides to send 6 students and 4 professors to attend a conference in London…

1) In an article from September 13, 2010 titled “Student Loan Default Rates Incr

1) In an article from September 13, 2010 titled “Student Loan Default Rates Increase,” the website ed.gov analyzes trends in default rates for student loans over time. For the yea…

1) In an excitatory synapse A) the membrane potential of the post synaptic neuro

1) In an excitatory synapse A) the membrane potential of the post synaptic neuron becomes more negative B) there is no change in the membrane potential of the post synaptic neuron…

1) In cattle, there is no dominance between the alleles for red coat (W) and whi

1) In cattle, there is no dominance between the alleles for red coat (W) and white coat (c). The heterozygote is intermediate or "roan" in color. a) Give the genotypic and phenoty…

1) In class we discussed blood doping issues. Now assume that the normal hematoc

1) In class we discussed blood doping issues. Now assume that the normal hematocrit of an athlete is 40. The athlete has a normal blood volume of 5 liters Just prior to a major co…

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