To encourage online sales, companies often try to attract subscribers by offering them free gifts using an online "Spin

[answerhappygod]

To encourage online sales, companies often try to attract
subscribers by offering them free gifts using an online "Spin the
Wheel". Suppose there are 9 possible types of free gifts in the
wheel. To check whether all the possible gift categories are
equally likely, i.e. the wheel is fair, the wheel is spinned 100
times and the number of counts of each type of gift is recorded.
The chi squared test statistic to assess the claim of the fairness
of the wheel turns out to be 20. The p-value of the chi squared
test is..
a.) 1-chisq.dist(20,15,1)
b.) 1-chisq.dist(9,df,1), where df is the degrees of freedom of
this chi squared curve
c.) 2*(1-chisq.dist(20,df,1)), where df is the degrees of
freedom of this chi squared curve
d.) 1-chisq.dist(20,df,1), where df is the degrees of freedom of
this chi squared curve
e.) 2*(1-chisq.dist(10,20,1))
f.) 1-chisq.dist(8,df,1), where df is the degrees of freedom of
this chi squared curve