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STATISTICS > QUIZ 2 > Flashcards

QUIZ 2 Flashcards

1
Q

What do you call processes involved in making conclusions about population values?

a. Estimating Parameters
b. Hypothesis Testing
c. Inferential Statistics
d. Descriptive Statistics

mali sagot ko rito

A

B. Hypothesis Testing

baka lang hehe

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2
Q

Which of the following best represents the central value of a set of data?

a. Variance
b. Average
c. Proportion
d. Standard Deviation

A

B. Average

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3
Q

The_̲̲̲̲̲̲̲_̲ is a range of values that contains the parameter value.

a. Confidence Limits
b. Confidence Interval
c. Confidence Coefficient
d. Confidence Level

A

B. Confidence Interval

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4
Q

Which of the following shows graphical results in making inferences about population values?

a. Pie Graph
b.Bar Graph
c. Trend Line
d. Normal Curve

A

D. Normal Curve

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5
Q

Which of the following are the 95% confidence coefficients?

a. ±1.645
b. +2.33
c. +1.96
d. +2.58

A

C. +1.96

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6
Q

When alpha is equal to 0.01, the critical value are?

a. 11.645
b. 12.33
c. £1.96
d. +2.58

A

D. +2.58

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7
Q

When n<30 and the population standard deviation is not known, what is the appropriate distribution?

a. z
b.t
c. n
d.p

A

B. t

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8
Q

When n is greater than equal to 30 and the populations standard deviation is known, what is the appropriate distribution?

a. z
b. t
c. n
d.p

A

A. z

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9
Q

In a t-distribution, the critical values are based on?

a. n
b. z
c. t
d. df

A

D. df

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10
Q

When X = 50 and n = 215 what is the value of p^?

a. 0.23
b. 4.30
c. 50
d. 215

A

A. 0.23

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11
Q

When X = 120 and n = 406 what is the value of q^?

a. 0.70
b. 20.30
c. 120
d. 406

A

A. 0.70

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12
Q

Given that n=50, 0=1.2 and a=0.01 The maximum error E is approximately?

a. 0.33
b. 0.39
c. 0.44
d. None of these

mali sagot ko rito

A
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13
Q

What is the value resulting from subtracting the maximum error from the sample mean?

a. Point Estimate
b. Lower limit of the interval estimate
c. Interval Estimate
d. Upper limit of the interval estimate

A

B. Lower limit of the interval estimate

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14
Q

Which of the following illustrates confidence level?

a. 32.80
b. 30-39
c. 90%
d. 90%-94%

A

C. 90%

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15
Q

Given that n=80, x=76.5 and s=3.1 Which of these is the point estimate of the population mean?

a. 80
b. 76.5
c. 8.90
d. 3.10

A

B. 76.5

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16
Q

What is a?

a. 95%
b. 28
c.1.6
d. 0.05

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A

A. 95%

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17
Q

What is the point estimate of µ?

a.95%
b. 28
c. v10
d. 1.6

mali ako dito

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A
18
Q

What is the appropriate distribution?

a.z
b. t
C. S
d.p

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A

B. t

19
Q

What are the confidence coefficients?

a.±1.96
b. 12.33
c. +2.26
d. +2.58

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A

C. +2.26

20
Q

The lower limit is approximate:

a. 27
b. 26.85
c. 26.81
d. 26.68

mali ako dito

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A
21
Q

What is the upper limit?

a. 29
b. 29.15
c. 29.19
d. 29.32

mali ako dito

The mean gasoline consumption of 10 cars is 28 liters with a standard deviation of 1.6 liters. Find the point and the interval estimates using 95% confidence level.

A
22
Q

What is a?

a. 95%
b. 0.01
c. 0.05
d. 0.10

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

A. 95%

23
Q

What are the confidence coefficients?

a. ±1.96
b. +2.33
c. +2.26
d. 12.58

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

A. ±1.96

24
Q

What is the value of X?

a. 1200
b. 586
c. 0.49
d. None of these

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

B. 586

25
Q

What are the p^ and q^?

a. 0.49 and 0.49
b. 0.49 and 0.51
c. 0.51 and 0.49
d. 0.51 and 0.51

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

B. 0.49 and 0.51

26
Q

What is the standard deviation of the sampling distribution of p^?

a.0.2499
b. 0.0002
c. 0.0144
d. 0.0500

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

C. 0.0144

27
Q

The error E is approximately?

a 0.05
b.0.04
c. 0.03
d 0.01

* mali ako rito*

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A
28
Q

What are the lower Iimit and the upper limit?

a. 0.44 and 0.54
b. 0.45 and 0.53
c. 0.46 and 0.52
d. 0.48 and 0.50

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

C. 0.46 and 0.52

29
Q

The true population proportion falls between:

a. 44% and 54%
b. 45% and 53%
c. 46% and 52%
d. 48% and 50%

In a learning style study, 1200 respondents were asked if they can assimilate concepts while watching television. 586 said Yes. Find a 95% confidence interval for the population proportion p?

A

C. 46% and 52%

30
Q

What do we call a decision-making process for evaluating claims about a population based on the characteristics of a sample purportedly coming from that population.

a. Estimating Parameters
b. Inferential Statistics
c. Hypothesis Testing
d. Descriptive Statistics

A

C. Hypothesis Testing

31
Q

What do we call a decision-making process for evaluating claims about a population based on the characteristics of a sample purportedly coming from that population.

a. Estimating Parameters
b. Inferential Statistics
c. Hypothesis Testing
d. Descriptive Statistics

A

C. Hypothesis Testing

32
Q

An intelligent guess about the characteristics of a population is called?

a, Mean
b. Proportion
c. Hypothesis
d. Test statistics

A

C. Hypothesis

33
Q

Under the normal curve, the middle part represents?

a. Confidence Level
b. Confidence interval
c. Acceptance Region
d. All of the above

mali ako rito

A
34
Q

Which of the following serves as a guide in deciding whether to reject or accept the null hypothesis?

a. Confidence Level
b. Decision Rule
c. Acceptance Region
d. Interpretation

A

B. Decision Rule

35
Q
  1. Under the normal curve, when the lines are drawn through these values, they separate the rejection region from the acceptance region.

a. Confidence Coefficients
b. Computed statistics
c. Z-values
d. T-values

mali ako rito

A

C. Z-values

baka lang hehe

36
Q
  1. In a left-tailed test, a = 0.05, the critical value of z is?

a.-1.96
b. 2.33
c. -1.645
d. -2.58

mali ako rito

A
37
Q
  1. When the confidence level is 99%, a= ?
    a. 0.1
    b. 0.01
    c. 0.05
    d. 0.5
A

B. 0.01

38
Q

What mathematical model is appropriate for decision-making?

a. Graphical Presentation
b. Normal Curve
c. Z-statistics
d. None of these

A

B. Normal Curve

39
Q

When the alternative hypothesis utilizes the symbol, the test is said to be?

a. Directional
b. Non-directional
c. One-tailed
d. None of these

A

B. Non-directional

40
Q

When the alternative hypothesis utilizes the > or the < symbol, the test is said to be?

a. Directional
b. Non-directional
c. Two-tailed
d. None of these

A

A. Directional

41
Q

A non-directional test is also called?

a. Two-tailed test
b. One-tailed test
c. Directional
d. None of these

A

A. Two-tailed test

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