Conclusions about data can be made based on patterns revealed by descriptive statistics. (True or false?)

Conclusions about data can be made based on patterns revealed by descriptive statistics.
 
  Indicate whether the statement is true or false

Q. 2

The grade point averages for 10 randomly selected students in an algebra class with 125 students are listed below.
 
  What is the effect on the width of the confidence interval if the sample size is increased to 20?
   2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
 
  A) The width remains the same.
  B) The width decreases.
  C) The width increases.
  D) It is impossible to tell without more information.

Q. 3

n = 80, p = 0.6, x = 42 (Round the standard deviation to three decimal places to work the problem.)
 
  A) Exact: 0.0354; Approximate: 0.0335 B) Exact: 0.0363; Approximate: 0.0353
  C) Exact: 0.0354; Approximate: 0.0344 D) Exact: 0.0354; Approximate: 0.0353
 
  Provide an appropriate response.

Q. 4

When sampling with replacement, the finite population correction factor can be omitted.
 
  Indicate whether the statement is true or false

Q. 5

When considering area under the standard normal curve, decide whether the area to the left of z = -2.5 is
  bigger than, smaller than, or equal to the area to the right of z = 2.5.
 
  A) equal to B) bigger than C) smaller than

Q. 6

Which of the following formulas, when applicable, gives exact answers to probability questions involving the
  binomial distribution?
 
  A) the binomial formula B) Table V
  C) the hypergeometric formula D) the Poisson formula

Q. 7

According to government data, the probability that an adult was never in a museum is 15. In a random survey of 10 adults, what is the probability that two or fewer were never in a museum?
 
  A) 0.002 B) 0.200 C) 0.800 D) 0.820