Suppose the nightly rate for a three-star hotel in Paris is thought to be bell-shaped and ...

Suppose the nightly rate for a three-star hotel in Paris is thought to be bell-shaped and symmetrical with a mean of 160 euros and a standard deviation of 8 euros. The percentage of hotels with rates between 144 and 176 euros is
 
  A) approximately 68.
  B) at least 89.
  C) approximately 95.
  D) at least 75.

Q. 2

As the true population mean moves away from the hypothesized mean, the power of the test decreases.
 
  Indicate whether the statement is true or false

Q. 3

Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that exactly five customers will arrive during the next 30 minutes?
 
  A) 0.0215
  B) 0.0943
  C) 0.1487
  D) 0.3070

Q. 4

The average class size this semester in the business school of a particular university is 38.1 students with a standard deviation of 12.9 students. The z-score for a class with 21 students is ________.
 
  A) -1.33
  B) 0
  C) 0.80
  D) 1.51

Q. 5

A psychology class consists of 14 business students and 21 non-business students. Sixteen students in this class are male. Eight students are both female and business majors. The number of men in the class who are not business majors is ________.
 
  A) 6
  B) 8
  C) 10
  D) 11

Q. 6

The standard error of the difference between population proportions describes the result of subtracting one sample proportion from a second sample proportion.
 
  Indicate whether the statement is true or false

Q. 7

Two-way ANOVA compares the means from different factors using two levels.
 
  Indicate whether the statement is true or false