a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval

13,909 results
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  7. math

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  9. 7th grade math (probability)

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  10. IGNOU probability

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  15. Algebra

    Randy, Sam, Tim and Will counted the number of puzzles they had solved in two months. Sam has solved twelve more than Tim. Randy had solved seventeen less than Sam.Will had solved twice as many as Randy. They have solved a total of 267 problems. How many

  16. NEED HELP PLZ!!! STATS

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    Find each probability for choosing a letter at random from the word MATHEMATICS. P(vowel) 4/11?

  18. stat

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    A committe of 5 members will be chosen from a group of 10 teachers and 5 students. What is the probability that the committee will have A) all teachers? B) 3 teachers and 2 students? C) 3 or 4 teachers?

  23. Statistics

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  28. Math

    Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

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  30. statistics

    Among the 500 first year students of college, 270 students study computer science, 345 students study mathematics, and 175 students study both computer science and mathematics. If one student is selected at random, find the probability that he did not take

  31. Statistics

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  32. Probability

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  33. Probability

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  34. Applied Mathematics references

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  36. statistics

    a simple random smaple of 55 mathematics teachers were timed as they completed sudoku puzzles. Their mean completion time was 20.3 minutes. The population standard deviation is assumed to be 12 mintues and times vary normally. Find 99% confidence interval

  37. The practice of working with school age children

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  38. The practice of working with school age children

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  39. math

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  40. Algebra

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  41. statistics

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  43. Basic Statistics

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  44. math

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  45. Math

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  46. Statistics

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  47. Statistics

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  48. Stats

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  49. college stats

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  52. 7th grade

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  53. math

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  56. statistics

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  57. Stats

    Three cards are selected, one at a time from a standard deck of 52 cards. Let x represent the number of tens drawn in a set of 3 cards. (A) If this experiment is completed without replacement, explain why x is not a binomial random variable. (B) If this

  58. math

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  62. Statistics (Verify My Answers)

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  63. math

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  64. Math

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  65. Math Essay

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  67. Math

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  68. Statistics

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  69. Probability

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  70. math

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  71. Statistics

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  73. Mathematics

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  74. statistics

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  75. statistics

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  76. University studies

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  77. Math

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  78. Math

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  79. Math

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  80. statistics

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  82. spanish

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  87. concept development

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  88. math

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  89. Math

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  91. English

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  95. math, adult education

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  98. maths

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  99. Algebra 1

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