Let μ1 and μ2 denote true average densities for two different types of brick. assuming normality of the two density distributions, test: h0: μ1 − μ2 = 0 versus ha: μ1 − μ2 ≠ 0 use the following data: n1 = 6, x1 = 23.72, s1 = 0.55, n2 = 4, x2 = 20.88, and s2 = 0.530. the conservative degrees of freedom, min(n1-1, n2-1), are:

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step-by-step explanation:

is there more to this question?

answer: - (a)

(b) 88 seats

step-by-step explanation:

given: in an auditorium, there are 22 seats in the first row and 28 seats in the second row.

thus first term=

second term=

the number of seats in a row continues to increase by 6 with each additional row.

⇒d= 6

a) given formula :

b)   let the number of seats (n) = 12

substitute n=12 in the explicit rule formed in (a)

∴there are 88 seats in 12 rows.