You want to test whether or not the following sample of 30 observations follows a normal distribution. the mean of the sample equals 11.83 and the standard deviation equals 4.53. 2 3 5 5 7 8 8 9 9 10 11 11 12 12 12 12 13 13 13 14 15 15 15 16 16 17 17 18 18 19 the hypothesis is to be tested at the 5% level of significance. if the expected frequencies for the classes are equal to 5, what is the critical value of the test statistic? select one: a. 1.645 b. 1.96 c. 7.815 d. 12.592

D

Step-by-step explanation:

Degree of freedom, df is  given by the following

df = (number of rows-1) * (number of columns-1)

Given:

number of rows = 6

number of columns = 3

Hence, df = (6-1) * (3-1) = 10

We will choose the option where the value is greater than or equal to 10,

Hence, Option D is correct.

step-by-step explanation:

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value