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63. How long must a parent expect to wait for his children to clean their rooms?

  1. eight days
  2. three days
  3. 14 days
  4. six days

64. What is the probability that a parent will wait more than six days given that the parent has already waited more than three days?

  1. 0.5174
  2. 0.0174
  3. 0.7500
  4. 0.2143

Use the following information to answer the next five exercises: Twenty percent of the students at a local community college live in within five miles of the campus. Thirty percent of the students at the same community college receive some kind of financial aid. Of those who live within five miles of the campus, 75% receive some kind of financial aid.

65. Find the probability that a randomly chosen student at the local community college does not live within five miles of the campus.

  1. 80%
  2. 20%
  3. 30%
  4. cannot be determined

66. Find the probability that a randomly chosen student at the local community college lives within five miles of the campus or receives some kind of financial aid.

  1. 50%
  2. 35%
  3. 27.5%
  4. 75%

67. Are living in student housing within five miles of the campus and receiving some kind of financial aid mutually exclusive?

  1. yes
  2. no
  3. cannot be determined

68. The interest rate charged on the financial aid is _______ data.

  1. quantitative discrete
  2. quantitative continuous
  3. qualitative discrete
  4. qualitative

69. The following information is about the students who receive financial aid at the local community college.

  • 1st quartile = $250
  • 2nd quartile = $700
  • 3rd quartile = $1200

These amounts are for the school year. If a sample of 200 students is taken, how many are expected to receive $250 or more?
  1. 50
  2. 250
  3. 150
  4. cannot be determined

Use the following information to answer the next two exercises: P ( A ) = 0.2, P ( B ) = 0.3; A and B are independent events.

70. P ( A AND B ) = ______

  1. 0.5
  2. 0.6
  3. 0
  4. 0.06

71. P ( A OR B ) = _______

  1. 0.56
  2. 0.5
  3. 0.44
  4. 1

72. If H and D are mutually exclusive events, P ( H ) = 0.25, P ( D ) = 0.15, then P ( H | D ).

  1. 1
  2. 0
  3. 0.40
  4. 0.0375

Chapter 9

73. Rebecca and Matt are 14 year old twins. Matt’s height is two standard deviations below the mean for 14 year old boys’ height. Rebecca’s height is 0.10 standard deviations above the mean for 14 year old girls’ height. Interpret this.

  1. Matt is 2.1 inches shorter than Rebecca.
  2. Rebecca is very tall compared to other 14 year old girls.
  3. Rebecca is taller than Matt.
  4. Matt is shorter than the average 14 year old boy.

74. Construct a histogram of the IPO data (see [link] ).

Use the following information to answer the next three exercises: Ninety homeowners were asked the number of estimates they obtained before having their homes fumigated. Let X = the number of estimates.

x Relative Frequency Cumulative Relative Frequency
1 0.3
2 0.2
4 0.4
5 0.1

75. Complete the cumulative frequency column.

76. Calculate the sample mean (a), the sample standard deviation (b) and the percent of the estimates that fall at or below four (c).

77. Calculate the median, M , the first quartile, Q 1 , the third quartile, Q 3 . Then construct a box plot of the data.

78. The middle 50% of the data are between _____ and _____.

Use the following information to answer the next three exercises: Seventy 5 th and 6 th graders were asked their favorite dinner.

Questions & Answers

what is terms data?
Mohsin Reply
define the types of data?
Mohsin
define the number of classes?
Mohsin
define the class limt?
Mohsin
define the class frequency and class interval ?
Mohsin
define class boundaries
George
what is axioms of probability
Khaleed Reply
characteristics of statistic
Safi Reply
a measure of cntral tendency is a quantitative value that tends to locate in some sense the middle of a set of data
khan Reply
in a large metropolitan area
Vernon Reply
a lecturer claims that his students score an average of 55 marks in their statistics test. the object supervisor wants to know wether the lecturer's claims is acceptable or not.what is the posible tail of the test?
Karen
2
J-zil
the best sampling method for A school has a total of 100 teachers. Each teacher in the school is given a number and then a random sample of 35 teachers is obtained.
Nurhaznissah Reply
what the best sampling method for A school has a total of 100 teachers. Each teacher in the school is given a number and then a random sample of 35 teachers is obtained.
Nurhaznissah
option please
Dewan
systematic
Dewan
any one send me the notes of these chpt if possible introduction to statistics measure of centeral tendency or average measure of dispensation moments and skewness presentation of data
Aqsa Reply
Kindly send me these notes.
Naheed
what is a regression, and what is it primarily used for
Denisha Reply
assume the sample populations do not have equal standard deviations and use the 0.05 significance level
Nokuthula Reply
what is the solution to this question?
Manbyen Reply
hi
Dewan
hello
Learn
hi please tell
Dewan
The controls that are usually used are
Rushikesh Reply
what is math
Rushikesh
the controls that are usually used in quality controls and also controls a process is key tool used in run chat, control chat and design of experiment etc.,
Sravanthi
mean is number that occurs frequently in a giving data
Chinedu Reply
That places the mode and the mean as the same thing. I'd define the mean as the ratio of the total sum of variables to the variable count, and it assigns the variables a similar value across the board.
Samsicker
what is mean
John Reply
what is normal distribution
RAHAT Reply
What is the uses of sample in real life
Waqas Reply
pain scales in hospital
Lisa

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Source:  OpenStax, Introductory statistics. OpenStax CNX. May 06, 2016 Download for free at http://legacy.cnx.org/content/col11562/1.18
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