A horizontal slope on an xy scatter plot indicates that there is a strong relationship between the ...

A horizontal slope on an xy scatter plot indicates that there is a strong relationship between the between the independent and dependent variables.
 
  Indicate whether the statement is true or false

Q. 2

A small sample size could provide a smaller sampling error than a larger sample size when taken from the same population.
 
  Indicate whether the statement is true or false

Q. 3

The widest confidence interval for an average value of y based on a value of x will occur at the average value for x.
 
  Indicate whether the statement is true or false

Q. 4

Expedia would like to test the hypothesis that the proportion of Southwest Airline flights that arrive on-time is less than 0.90. A random sample of 140 United Airline flights found that 119 arrived on-time. Expedia would like to set  = 0.05.
 
  The critical value for this hypothesis test would be ________.A) 1.28
  B) 1.645
  C) 2.05
  D) 2.33