Which of the following is not a property of the chi-square distribution? choose the correct answer below. a. the chi-square distribution is different for each number of degrees of freedom. b. the mean of the chi-square distribution is 0. c. the values of chi-square can be zero or positive, but they cannot be negative. d. the chi-square distribution is not symmetric.

B. The mean of the chi-square distribution is 0.

Step-by-step explanation:

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles