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1)
A random sample of n=25 values gives sample mean 83. Can this sample be regarded as drawn from a normal population with μ= 80 and s= 7? In this question the alternative hypothesis will be:
- A) H1: μ = 80
- B) H1: μ ? 80
- C) H1: μ > 80
- D) H1: μ <80
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2)
The binomial distribution is negatively skewed when:
- A) p>q
- B) p
- C) p=q
- D) p=q=1/2
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3)
When we draw the sample with replacement, the probability distribution to be used is:
- A) Binomial
- B) Hypergeometric
- C) Binomial & hypergeometric
- D) Poisson
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4)
The probability of an event is always:
- A) less than 1
- B) between 0 and 1
- C) greater than 1
- D) between 1 and 2
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5)
If the values of variables are increasing or decreasing in the same direction then such kind of correlation is referred as
- A) Zero Correlation
- B) Perfect Correlation
- C) Positive Correlation
- D) Negative Correlation
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6)
Ms. Christian calculated a correlation coefficient of .75. Which of the following reflects the best interpretation of this?
- A) Weak negative.
- B) Strong negative.
- C) Weak positive.
- D) Strong positive.
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7)
How many numbers of parameter(s) are in t-distribution?
- A) 0
- B) 1
- C) 2
- D) 3
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8)
A standard deviation obtained from sampling distribution of sample statistics is known as
- A) Sampling Error
- B) Standard error
- C) Variance error
- D) SD
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9)
In a sample of 800 students in a university, 160, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of :
- A) A sample
- B) A population
- C) Statistical inference
- D) Descriptive statistics
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10)
A set that contains all possible outcomes of a system is known as
- A) Finite
- B) Infinite Set
- C) Universal
- D) None of these
