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48問 • 1年前
  • Gwenneth Dalawampu
    • 通報

    問題一覧

  • 1

    It os a variable whose values are determined by chance

    random variable

  • 2

    If two coins are tossed, which is not possible value of the random variable for the number of heads?

    3

  • 3

    Which of the following is not true statement?

    Random variables can only have one value

  • 4

    What is the standard deviation of the probability distribution?

    1.00

  • 5

    The normal probability distribution is a _ shaped curve

    bell

  • 6

    The following are properties of normal probability distribution except

    The talls of the curve touch the horizontal axis.

  • 7

    A standard normal curve is a normal probability distribution that has a

    μ= 0 and ó = 1

  • 8

    The Table of Areas under the Normal Curve is also known as

    Z-Table

  • 9

    What is the area corresponding to z = 1.45?q

    0.4265

  • 10

    A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is

    1/26

  • 11

    Random samples with size of 4 are drawn from the popultion containing the values 14, 19, 12, 30, 48, 53. Find the mean of the sample means.

    14.3

  • 12

    A population consists of five numbers 2, 3, 6, 8 and 11. Consider sample of size 2 that can be dra from this population. How many possible samples can be drawn from the population?

    10

  • 13

    In finding the degrees of freedom we use

    n-1

  • 14

    Which of the following z-score values correspond to a value of random variable X = 50, If the standard deviation s = 5, and mean X= 40?

    z=2

  • 15

    Which of the following represents the area under the curve that is at most-1?

    c

  • 16

    Which of the following corresponds to the area under the curve of the notation, Piz> 1.32)7

    0.0934

  • 17

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. In the given problem, which formula should be used to determine a z-score?

    z=x-u/ó

  • 18

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. What is the probability that the height of a child, picked at random, is less than 104 cm?

    0.1587

  • 19

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. How many children belongs to the upper 15% of the group?

    75

  • 20

    How do you call the type of random sampling in which each member of the population has an equal chance of being selected?

    Simple Random Sampling

  • 21

    Which of the following is a sampling method that is sometimes referred to as area sampling and applied on a geographical basis?

    Cluster Sampling

  • 22

    Which of the following refers to descriptive measures computed from a populatistics

    Parameter

  • 23

    Which of the following represents statistics?

    Proportion of 2000 randomly sampled participants to support same sex union.

  • 24

    Which of the following refers to a frequency distribution using the means computed from all possible random samples of a specific size taken from a population?

    Sampling Distribution of Sample Means

  • 25

    If a population consists of numbers 2, 4, 9, 10 and 5. How many possible samples of size n=3 can be drawn?

    10

  • 26

    Which of the following is NOT a type of random sampling?

    purposive

  • 27

    You wish to examine the effects of community quarantine on your fellow students. You decided borrow a list from the guidance office and select every 10th student on it. What sampling technique you using?

    systematic

  • 28

    The following are properties of sampling distribution EXCEPT.

    óx=o²/√n•√N-n/N-1

  • 29

    Which of the following is a parameter?

    ó²

  • 30

    Which of the following is the mean sample 7, 11, 22, 24, and 27?

    18.20

  • 31

    These are range of values that is used to estimate a parameter

    margin of error

  • 32

    it refers to thhe percentage of probability that the confidence interval would contain thetrue population parameter when you draw a random sample many times

    confidence level

  • 33

    Which of the following is the notation used for the variance of the sampling distribution of the sample mean?

    óx³

  • 34

    The mean weight of two thousand (2000) 11-year-old children is 35 kilograms with a standard deviation of 5 kilograms. Samples of 25 children were selected and the mean weight of this group was found to be 34 kilograms with a standard deviation of 3 kilograms. What condition of the sampling distribution of the sample mean for normal population manifests in the situation?

    Population variance is known.

  • 35

    For numbers 36-37 please refer to the problem below. A population of a certain LGBTQ+ community is 36. consists of six (6) measurements 2, 3, 6, 9, 11, and 5. What is the mean of the population?

    6

  • 36

    What is the variance of the population?

    10

  • 37

    All are properties of t- distribution except

    variance is less than 1

  • 38

    All are parts of the t distribution table except

    sample size

  • 39

    t distribution value are also called

    all of the above

  • 40

    What is the t-value if n = 28 and confidence level = 95%?

    2.052

  • 41

    What is the t-value such that the area in the right tail is 0.05 with 30 degrees of freedom.

    1.697

  • 42

    What is the 90th percentile with sample size of 18?

    1.333

  • 43

    What is the z value of 99% confidence interval?

    2.58

  • 44

    It is defined as the maximum likely difference between the observed sample mean and the true value of the population mean µ.

    margin of error

  • 45

    A researcher wants to estimate the number of hours that 5-year-old children spend watching television. A sample of 50 five-year old was observed to have a mean viewing time of 3 hours. The population is normally distributed with a = 0.5 hours. Find the 95%. What is the margin of error?

    0.14

  • 46

    What is the value of upper limit

    2, 36, 3.14

  • 47

    what is the distribution have used in the problem?

    none of the above

  • 48

    what statistucs equation used finding the sample

    all of the above

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    問題一覧

  • 1

    It os a variable whose values are determined by chance

    random variable

  • 2

    If two coins are tossed, which is not possible value of the random variable for the number of heads?

    3

  • 3

    Which of the following is not true statement?

    Random variables can only have one value

  • 4

    What is the standard deviation of the probability distribution?

    1.00

  • 5

    The normal probability distribution is a _ shaped curve

    bell

  • 6

    The following are properties of normal probability distribution except

    The talls of the curve touch the horizontal axis.

  • 7

    A standard normal curve is a normal probability distribution that has a

    μ= 0 and ó = 1

  • 8

    The Table of Areas under the Normal Curve is also known as

    Z-Table

  • 9

    What is the area corresponding to z = 1.45?q

    0.4265

  • 10

    A card is drawn from a pack of 52 cards. The probability of getting a queen of club or a king of heart is

    1/26

  • 11

    Random samples with size of 4 are drawn from the popultion containing the values 14, 19, 12, 30, 48, 53. Find the mean of the sample means.

    14.3

  • 12

    A population consists of five numbers 2, 3, 6, 8 and 11. Consider sample of size 2 that can be dra from this population. How many possible samples can be drawn from the population?

    10

  • 13

    In finding the degrees of freedom we use

    n-1

  • 14

    Which of the following z-score values correspond to a value of random variable X = 50, If the standard deviation s = 5, and mean X= 40?

    z=2

  • 15

    Which of the following represents the area under the curve that is at most-1?

    c

  • 16

    Which of the following corresponds to the area under the curve of the notation, Piz> 1.32)7

    0.0934

  • 17

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. In the given problem, which formula should be used to determine a z-score?

    z=x-u/ó

  • 18

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. What is the probability that the height of a child, picked at random, is less than 104 cm?

    0.1587

  • 19

    Five hundred children participated in a field demonstration. Their height averaged 110cm withstandard deviation of 6 cm. How many children belongs to the upper 15% of the group?

    75

  • 20

    How do you call the type of random sampling in which each member of the population has an equal chance of being selected?

    Simple Random Sampling

  • 21

    Which of the following is a sampling method that is sometimes referred to as area sampling and applied on a geographical basis?

    Cluster Sampling

  • 22

    Which of the following refers to descriptive measures computed from a populatistics

    Parameter

  • 23

    Which of the following represents statistics?

    Proportion of 2000 randomly sampled participants to support same sex union.

  • 24

    Which of the following refers to a frequency distribution using the means computed from all possible random samples of a specific size taken from a population?

    Sampling Distribution of Sample Means

  • 25

    If a population consists of numbers 2, 4, 9, 10 and 5. How many possible samples of size n=3 can be drawn?

    10

  • 26

    Which of the following is NOT a type of random sampling?

    purposive

  • 27

    You wish to examine the effects of community quarantine on your fellow students. You decided borrow a list from the guidance office and select every 10th student on it. What sampling technique you using?

    systematic

  • 28

    The following are properties of sampling distribution EXCEPT.

    óx=o²/√n•√N-n/N-1

  • 29

    Which of the following is a parameter?

    ó²

  • 30

    Which of the following is the mean sample 7, 11, 22, 24, and 27?

    18.20

  • 31

    These are range of values that is used to estimate a parameter

    margin of error

  • 32

    it refers to thhe percentage of probability that the confidence interval would contain thetrue population parameter when you draw a random sample many times

    confidence level

  • 33

    Which of the following is the notation used for the variance of the sampling distribution of the sample mean?

    óx³

  • 34

    The mean weight of two thousand (2000) 11-year-old children is 35 kilograms with a standard deviation of 5 kilograms. Samples of 25 children were selected and the mean weight of this group was found to be 34 kilograms with a standard deviation of 3 kilograms. What condition of the sampling distribution of the sample mean for normal population manifests in the situation?

    Population variance is known.

  • 35

    For numbers 36-37 please refer to the problem below. A population of a certain LGBTQ+ community is 36. consists of six (6) measurements 2, 3, 6, 9, 11, and 5. What is the mean of the population?

    6

  • 36

    What is the variance of the population?

    10

  • 37

    All are properties of t- distribution except

    variance is less than 1

  • 38

    All are parts of the t distribution table except

    sample size

  • 39

    t distribution value are also called

    all of the above

  • 40

    What is the t-value if n = 28 and confidence level = 95%?

    2.052

  • 41

    What is the t-value such that the area in the right tail is 0.05 with 30 degrees of freedom.

    1.697

  • 42

    What is the 90th percentile with sample size of 18?

    1.333

  • 43

    What is the z value of 99% confidence interval?

    2.58

  • 44

    It is defined as the maximum likely difference between the observed sample mean and the true value of the population mean µ.

    margin of error

  • 45

    A researcher wants to estimate the number of hours that 5-year-old children spend watching television. A sample of 50 five-year old was observed to have a mean viewing time of 3 hours. The population is normally distributed with a = 0.5 hours. Find the 95%. What is the margin of error?

    0.14

  • 46

    What is the value of upper limit

    2, 36, 3.14

  • 47

    what is the distribution have used in the problem?

    none of the above

  • 48

    what statistucs equation used finding the sample

    all of the above