random

4,717 results, page 46
  1. psychology

    Questions: 1. What are the design elements (IV, DV) and operational definitions? 2. What are the potential confounds? 3. What are the strengths and weaknesses of the study design? 4. The message written on the back of the check concerned an upcoming
  2. Data Analyse

    Question 1 Production Rates A manufacturing company wishes to estimate the number of items that its workforce can produce on average each hour now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past
  3. Statistics

    The Wechsler Adult Intelligence Scale (WAIS) is a common "IQ test" for adults. The distribution of WAIS scores for persons over 16 yrs of age is approximately Normal with mean (100) and Standard Deviation 15, (a) Whatis the probability that a random chosen
  4. probability

    out of 250 students interviewed at a community college, 90 were taking mathematics but not computer science, 160 were taking mathematics, and 50 were taking neither mathematics nor computer science. Find the probability that a student chosen at random was
  5. Math

    Hi! I have 4 math questions! (: 1.) There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both Saturday and Sunday? 2.)In a shipment of alarm clocks, the probability that
  6. statistics

    Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as Candy Express, The Fudge Company, Karmel Corn, and Rocky
  7. justice

    No clue where to start with this...if someone can just help me setup these problems or assist in any way that would be great. 1. d=2.507 g/1.22 mL = 2.054918033 g mL^-1 explain how both the rules for significant figures and the random error calculation
  8. chemistry

    No clue where to start with this...if someone can just help me setup these problems or assist in any way that would be great. 1. d=2.507 g/1.22 mL = 2.054918033 g mL^-1 explain how both the rules for significant figures and the random error calculation
  9. math

    14. The top of a dresser is 33/ 4 feet from an 8-foot ceiling. Which of the following is the height of the dresser in feet? A. 41/4 B. 43/4 C. 5,/4 D. 53/4 15. A company that made $2.4 million in profits the previous year is on pace to make $3 million in
  10. probability

    Listed below is the population by state for the 15 states with the largest population. Also included is whether that state's border touches the Gulf of Mexico, the Atlantic Ocean, or the Pacific Ocean (coastline). Rank State Population Coastline 1
  11. statistics

    The scores of students on the ACT college entrance examination in a recent year had a normal distribution with a mean of 18.6 and a standard deviation of 5.9. A simple random sample of 50 students who took the exam is selected for study: A) What is the
  12. Physics/Nautical Mile

    Still studying! I have The Macmillan & Silk Cut Nautical Almanac from 1981 which pre-dates WGS84 and they make reference to the NM being 6046 feet at the equator and 6108 feet at the poles. Conversions to metres = 1842.82m and 1861.71m. Remarkably similar
  13. Statistic

    In a population of over 15,000 patients, the distribution of systolic blood pressure follows the normal curve. Investigators believe the average systolic blood pressure in the population is 120 mm. The investigators take a simple random sample of 6
  14. Probability

    4.3. In a certain college town, 27.5 percent of the students failed Mathematics (Math), 19.8 percent failed Biology (Bio), and 11 percent failed both Math and Bio. A student is selected at random. Let A represent the event of failing Math, so that A' is
  15. Math

    1.What is the volume of the figure above if a = 6 units and b = 9 units? A. 1,620 cubic units B. 540 cubic units C. 324 cubic units D. 342 cubic units 2.Susan is building a cage for her rabbit and started by making the supports for the cage as shown below,
  16. Probability

    Let X be a random variable, and let ck=E[Xk]. We assume that X is such that ck exists (and is finite) for all k∈{0,1,2,⋯}. Define Yk=Xk. Please express your answers in terms of X,c1,c2,…,ck,… (for c1,c2,... please enter c1,c2,..., for ck please
  17. Statistics

    A simple random sample is conducted of 1486 young adults who were once college students seeking bachelor’s degrees at a specific university. The study found that 780 of these young adults actually earned bachelor’s degrees. Use a 0.05 significance
  18. Statistics

    A researcher performs a hypothesis test to test the claim that among girls aged 9-10, the mean score on a particular aptitude test differs from 72, which is the mean score for boys of the same age. Data were collected from a random sample of 43 girls aged
  19. java programming

    i'm almost done with this program but i can't figure out how to shoo the wumpus. i'm stuck as to how the shot direction has the wumpus in there. it's the last part of the main method is where i put it..please help thanks import java.util.*; public class
  20. probability

    Let X be a continuous random variable. We know that it takes values between 0 and 3, but we do not know its distribution or its mean and variance. We are interested in estimating the mean of X, which we denote by h. We will use 1.5 as a conservative value
  21. bio!

    how does the process of crossing over results in genetic variability in an organism due to meiotic cell division? crossing over is when the homologous chromosomes pair up on the metaphase plate during meiosis 1, the homologous chromosomes swap short bits
  22. Probability

    Consider a sequence of independent tosses of a biased coin at times k=0,1,2,…,n. On each toss, the probability of Heads is p, and the probability of Tails is 1−p. A reward of one unit is given at time k, for k∈{1,2,…,n}, if the toss at time
  23. math

    A bag contains 8 blue coins and 6 red coins. A coin is removed at random and replaced by three of the other color. a) What is the probability that the removed coin is blue? b) If the coin removed is blue, what is the probability of drawing a red coin after
  24. Statistics 2

    The body temperature of healthy human beings can be assumed to have a normal distribution with mean  and standard deviation . Body temperature measurements taken from a sample of 130 healthy individuals shows the sample mean temperature to
  25. statistic

    A survey of drivers in the United States found that 15% never use a cell phone while driving. Suppose that drivers arrive at random at an auto inspection station. a. If the inspector checks 10 drivers, what is the probability that at least one driver never
  26. stastics

    A survey of drivers in the United States found that 15% never use a cell phone while driving. Suppose that drivers arrive at random at an auto inspection station. a. If the inspector checks 10 drivers, what is the probability that at least one driver never
  27. Statistics/Probability

    2. Two roommates, roommate X and roommate Y, are expecting company and are arguing over who should have to wash the dishes before the company arrives. Roommate X suggests a game of rock-paper-scissors to settle the dispute. Consider the game of
  28. statistics

    Q. The MBA department is concerned that dual degree students may be receiving lower grades than the regular MBA students. Two independent random samples have been selected. 100 observations from population 1 (dual degree students) and 100 from population 2
  29. Math

    My question: A spinner looks like this: A disc divided into sections that might or might not be the same size, with a pointer that when spun will land on some part of the disc at random. The sections might be colours, or, as in these problems, have numbers
  30. statistics

    Use the method specified to perform the hypothesis test for the population mean µ. The highest acceptable level of pesticide found in quail has been limited to 0.35 parts per million (ppm). A hunting organization measured the level of the pesticide found
  31. Science

    Genetic drift results in a change in gene frequencies because a. gene flow within the population is less than gene flow between populations. b. reproduction is non-random within the population c. the population size is so small that chance occurrences can
  32. Statistics

    Age 0-14 number of people= 206,423 Age 15-34 number of people= 265,778 Age 35-54 number of people= 308,946 Age 55-74 number of people= 159,092 Age over 74 number of people= 69,264 1)Classify the data in the table. A)positively skewed B)negatively skewed
  33. math

    Age 0-14 number of people= 206,423 Age 15-34 number of people= 265,778 Age 35-54 number of people= 308,946 Age 55-74 number of people= 159,092 Age over 74 number of people= 69,264 1)Classify the data in the table. A)positively skewed B)negatively skewed
  34. English check

    Used alloyed, comprehend, comprised, cower, empathize, formidable, homogeneous, partisan, ponderous, and wary to complete these sentences. Please correct me if I'm wrong! 1. Winston Churchill wrote of the fascination people have for "the tiny things, the
  35. Physics

    1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
  36. Physics

    1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
  37. Physics

    1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
  38. Physics

    1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
  39. Physics

    1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x
  40. statistics

    In a simple random sample of 250 father-son pairs taken from a large population of such pairs, the mean height of the fathers is 68.5 inches and the SD is 2.5 inches; the mean height of the sons is 69 inches and the SD is 3 inches; the correlation between
  41. Math

    5. The following random sample was selected : 4, 6, 3, 5, 9, 3. Find the 95% confidence interval for the mean of the population. 6. In a sample of 35 high school seniors, 14 of them are attending college in the fall. Find the 95% confidence interval for
  42. math

    Please check my answers Would you be more likely to get at least 70% tails if you flip a fair coin 10 times or if you flip a fair coin 1000 times? same Consider a bowl containing 36 different slips of paper. Ten of the slips of paper each contain one of
  43. Math Please Check My Answer

    A box contains 95 pink rubber bands and 90 brown rubber bands. You select a rubber band at random from the box. Find each probability. Write the probability as a fraction in simplest form. a. Find the theoretical probability of selecting a pink rubber
  44. STATISTIC

    1. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was: (3 marks) 2. The heights (in inches) of adult males in
  45. Probability

    MY MAIN PROBLEM IS FIGURING OUT WHAT DISCRETE DISTRIBUTION TO USE, BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the incorrect one. Is there some way I can easily find out which one to use.
  46. Quick english check

    Used alloyed, comprehend, comprised, cower, empathize, formidable, homogeneous, partisan, ponderous, and wary to complete these sentences. Please correct me if I'm wrong! 1. Winston Churchill wrote of the fascination people have for "the tiny things, the
  47. Quick English check

    Used alloyed, comprehend, comprised, cower, empathize, formidable, homogeneous, partisan, ponderous, and wary to complete these sentences. Please correct me if I'm wrong! 1. Winston Churchill wrote of the fascination people have for "the tiny things, the
  48. Statistics

    Can someone help with these questions. I did majority of the work. but some i need help with. Are the mean number of times a month a person eats out the same for whites, blacks, Hispanics and Asians? Suppose that Table 13.26 shows the results of a study
  49. Counting and Probability

    (a) A cube is painted red on all six sides, then cut into 125 smaller congruent cubes. How many of the small cubes are painted red on exactly one side? (b) A cube is painted red on all six sides, then cut into 125 smaller congruent cubes. How many of the
  50. epidemiology

    Assessing Random Error, Confounding, and Effect Modification Although researchers do their best to reduce error within every study, there will always be error. It is important to identify and report any possible error within the research study in order to
  51. statistics

    A random group of customers at a fast food chain were asked whether they preferred hamburgers, chicken sandwiches, or fish sandwiches. The restaurant's marketing department claims that 40% of the customers prefer hamburgers, 46% of the customers prefer
  52. Statistics

    Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data
  53. Statistics

    Are my answers correct? Thanks! 1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data
  54. Check This Statistics Homework

    1.) Based on a survey of a few thousand people, a newspaper reporter wants to draw conclusions about how a country’s citizens in general feel about the war in Iraq. At this point, is the reporter mainly concerned with data production, displaying and
  55. statistics

    A researcher believe that college students spend a different amount of time talking on the phone than they do instant messaging. She takes a random sample of 12 college students and records the number of hours per week each student spends on each activity
  56. Business Research for Decision Making

    1. Decide on the type of tool or instrument you think would be effective given your topic on if there is no relationship between customer relationship and customer loyalty, explain why this type of tool would be optimal, and point to research which has
  57. mATH ANSWERS

    1) If the odds in favor of an event A are 3 to 1, what is the probability associated with event A occurring? A) B) C) 4 D) Determine whether the situation calls for a discrete or continuous random variable. 2) The height of a randomly selected student. A)
  58. Statistics

    Information from the American Institute of Insurance indicates the mean amount of life insurance per household in the United States is $120,000. This distribution follows the normal distribution with a standard deviation of $38,000. (A) If we select a
  59. statistics

    Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent
  60. statistics

    Accuracy of price scanners at Wal-Mart. The National Institute for Standards and Technology (NIST) mandates that for every 100 items scanned through the electronic checkout scanner at a retail store, no more than 2 should have an inaccurate price. A recent
  61. Math Statistics

    The sorting algorithm known as bogosort can be described in pseudocode as: while not isSorted(input): shuffle(input) If we feed bogosort a shuffled array of length n of unique items the distribution of the number of times bogosort checks if the array is
  62. Statistic

    Consider a football team for whom the numbers on the active players’ jerseys are 29, 41, 50, 58, 79,…, 10 (listed in alphabetical order of the players’ names). Does it make sense to calculate the mean of those numbers? Why or why not? 2. The Fair
  63. Statistics

    A university has an exclusive agreement with the coffee chain Monobeans. Several students and faculty complained about their lack of baked goods. Looking for a better provider of carbs and caffiene, the university management rents out for one trial
  64. Statistics

    A university has an exclusive agreement with the coffee chain Monobeans. Several students and faculty complained about their lack of baked goods. Looking for a better provider of carbs and caffiene, the university management rents out for one trial
  65. psychology

    Rind, B., & Strohmetz, D. (1999). Effect on restaurant tipping of a helpful message written on the back of customers’ checks. Journal of Applied Psychology, 29, 139-144. doi:10.1111/j.15591816.1999.tb01378.x This is the article to use to answer these
  66. theory of evolution

    Just need some help with checking my answers 1. In Europe, three lineages of bears evolved from a common ancestor. Two of those lineages led to present-day black bears and brown bears. The third lineage led to cave bear that went extinct 24,000 years ago.
  67. Statistics (Reiny)

    1. A consumer organization estimates that 30% of the households in a particular community have one television set, 39% have two sets, and 20% have three or more sets. What is the probability that a household chosen at random does not have two sets? A) 0.39
  68. mangement science the art of modeling w/ spreadshe

    Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle.  The extended warranty covered defects occurring after the initial three-year warranty
  69. Elements of Psychology

    I need help on these questions. My answers have the < by them 1. In a typical neuron, sheaths of fatty tissue called _______ surround the axon. A. terminals C. synapse B. dendrites D. myelin <C 2. You’ve already gathered data to measure the
  70. English

    Can someone check out the spelling and grammar for me, please? In this drawing, I was drawing cauliflower with some other vegetables. The vegetables was in the background and in the foreground, it was the cauliflower. This mainly should be a line drawing.
  71. statistics

    We are studying mutual bond funds for the purpose of investing in several funds. For this particular study, we want to focus on the assets of a fund and its five-year performance. The question is: Can the five-year rate of return be estimated based on the
  72. Statistics

    I've made an attempt to solve these using my TI-84 plus, however I don't know if my approach is correct. Any help is appreciated. 1.) As the costs of prescription drugs escalate, many senior citizens are ordering from or going to Canada to get their
  73. Math

    8) A consumer groups tries to determine the most expensive items in a convenience store. Four items are purchased in the convenience store and compared to the average price in stores in the area. Assume tat the price distribution is normal. Use your
  74. statistics

    1. Prospective Cohort Study The following tables show the crude and sex-specific results from a Prospective Cohort Study that examines the association between a binary exposure (E) and the development of a disease (D) during 20 years of follow-up. Full
  75. math, help

    I need help or hint on the setup: what is the probability that at least 2 students in a class of 36 have the same birthday? This is 1 minus the probability that all students have different birthdays. Suppose that the birthday of a student is completely
  76. math

    in a certain town 40% of men are smokers. It is known that 6% of men in this town have lung disease. Of those men having lung disease 85% are smokers. A man is selected at random from this town. Consider the events: D<<the selected man has a lung
  77. Statistics Math

    1. What type of car is more popular among college students, American or foreign? One hundred fifty-nine college students were randomly sampled and each was asked which type of car he or she prefers. A computer package was used to generate the printout
  78. stats

    Question 5 of 10 A z-score of 2.0 is two standard deviations above the mean of the distribution (t). True False I chose answer A The z scores is a ratio of difference to variability (t). True False I chose False Question 6 of 10 What’s the probability
  79. probability

    1. A large video rental chain recently decided to change its rental policy, allowing an unlimited return date instead of requiring that movies be returned the next day. The marketing team reasoned that this would greatly increase the popularity of their
  80. Theology

    How can free will be compatible with predestination, when they hold two different views of creaiton? Free will, that God created almost everything, and predestination, that he created everything. Free will and predestination are not compatible. The
  81. Statistics

    The average age of chemical engineers is 37 years with a standard deviation of 4 years. If an engineering firm employs 25 chemical engineers, find the probability that the average age of the group is greater than 38.2 years old. If this is the case, would
  82. statistics

    A particular report included the following table classifying 711 fatal bicycle accidents according to time of day the accident occurred. Time of Day Number of Accidents Midnight to 3 a.m. 38 3 a.m. to 6 a.m. 29 6 a.m. to 9 a.m. 64 9 a.m. to Noon 78 Noon to
  83. [Data Management] - Probability

    I need help with a probability quesition that has been presented in my grade 12 class. I'm really not sure how to go about solving it. "What is the probability of being dealth exactly 3 of a kind in your 5-card poker hand?" Thanks for any help. the
  84. 6th grade math quiz

    1. Which of the following sample spaces correctly lists all the possible outcomes for flipping a coin and spinning a four-colored spinner (red, blue, green, and yellow)? A. H-red, H-blue, H-green, H-yellow, T-yellow, T-green, T-blue, T-red B. H-red, T-red,
  85. Econ 112

    A researcher believes that the average size of farms in the U.S. has increased from the 2002 mean of 471 acres. She took a sample of 23 farms in 2011 to test her belief and found a sample mean of 498.8 acres and a sample standard deviation of 46.9 acres.
  86. Literacy

    Please check my work, thank you. Question 1 – 4: Access the Library of Congress library Catalog. Then, find the information to answer the question. 1. What year was the oldest copy of Ralph Ellison’s Going to the Territory published? A. 1952 B. 1986 C.
  87. computers

    i have a java problem. i'm trying to write the hunt the wumpus game with simple conditions: (check-marked the ones i already accomplished) [x]the pits will be placed randomly [x] the wumpus is placed in the maze randomly (not sure if i did that one
  88. Statistics

    part 2 - An entertainment company owns and operates movie theaters in Wyoming. The president of the company is concerned that film rentals are hurting the business. They directed a staff member to estimate the total number of films rented by households in
  89. statistics

    A college professor believes that students take an average of 15 credit hours per semester. A random sample of 24 students in his class of 250 reported the following number of credit hours that they were taking:
  90. Probability

    Caleb builds a particle detector and uses it to measure radiation from a remote star. On any given day, the number of particles, Y, that hit the detector is distributed according to a Poisson distribution with parameter x. The parameter x is unknown and is
  91. Stastics

    Did I do this right and should i show more work? Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature
  92. Satistics

    1.A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscientific survey had an initial result of
  93. Statistics

    Listed below are body temperatures for four subjects measured at two different times in a day. Body Temperature (°𝐹) 𝑎𝑡 6 𝑎𝑚: 98.0,97.0,98.6,97.4 Body Temperature (°𝐹) 𝑎𝑡 6
  94. Statistics Problems

    The bank sets up an experiment to test the effectiveness of the DVD. The mail it out to a random sample of delinquent customers and keep track of how many actually do contact the bank to arrange payments. The bank's statistician calculates a p-value
  95. Statistics

    The bank sets up an experiment to test the effectiveness of the DVD. The mail it out to a random sample of delinquent customers and keep track of how many actually do contact the bank to arrange payments. The bank's statistician calculates a p-value
  96. Intro to Probability

    MY MAIN PROBLEM IS FIGURING OUT WHAT DISCRETE DISTRIBUTION TO USE, BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the incorrect one. Is there some way I can easily find out which one to use.
  97. Intro to Probability

    MY MAIN PROBLEM IS FIGURING OUT WHAT DISCRETE DISTRIBUTION TO USE, BERNOULLI, BINOMIAL, DISCRETE UNIFORM, GEOMETRIC NEGATIVE BINOMIAL, OR POISSON. Every time I choose one, it's the incorrect one. Is there some way I can easily find out which one to use.
  98. statistics

    The Business School Dean wants to determine if the future plans are significantly different for the three majors at a level of confidence of at least 90%. What test(s) would you recommend? 2. A company hired 20 salespeople and gave them an initial sales
  99. Math - 7th grade

    Can you check/explain the following: 1. If you roll a number cube 66 times, how many times should you expect to roll a 1? a. 9 times b. 11 times c. 8 times d. 10 times Ans. P(1) = favorable outcome/possible outcome = 66/396 , (1 x 66rolls, and 6sides x 66
  100. Statistics

    Step 2 - Transform the sample mean into a z-score (p. 133) x̅ = 26, N = 30, σ_X=6 Z = (X- µ)/(σ_X/√N) = (24- 26)/(6/5.4772) = (-2)/(1.0955) = 1.8257 Z = - 1.83 The z-score table notes that the area between the mean of 26 and the

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