Statistics Test...

If  ∑f_i = 15, ∑f_i x_i = 3p+36 and the mean of the distribution is 3, then the value of ‘p’ is

If xi′s are the midpoints of the class intervals of grouped data, fi′s are the corresponding frequencies and $\overline{x}$ is the mean, then ∑(f_ix_i − $\overline{x}$)  is equal to

The marks obtained by 9 students in Mathematics are 59, 46, 31, 23, 27, 40, 52, 35 and 29. The mean of the data is

The mean of the data when ∑ f_id_i= −500, ∑ f_i = 100 and a = 125 is

If ∑ f_iu_i = 29, ∑ f_i = 30, a = 47.5 and h = 15, then the value of x̄ is

The mean of the first 10 prime numbers is

If ∑ f_i=17, ∑ f_ix_i=4p + 63 and the mean of the distribution is 7, then the value of ‘p’ is

∑ (x_i − x̄) is equal to

If ∑f_ix_i = 1860 and ∑f_i = 30, then the value of $\overline{x}$ is

The mean of the first 10 natural numbers is

The mean of first 10 composite numbers is