Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69.3 bpm. For a random sample of 140 adult males, the mean pulse rate is 69.8 bpm and the standard deviation is 11.2 bpm. Complete parts (a) and (b) below.

The question is find the test statistic

The test statistic is 0.5282

Step-by-step explanation:

Hypothesized mean u =69.3 , sample size (n) = 140, sample mean x = 69.8 ,  standard deviation s = 11.2

H₀: u = 69.3 bpm,  

Hₐ: u ≠ 69.3

The test statistic is given by = (x-u / (s/√n). Thus we have,

(69.8 - 69.3) / (11.2/√140)

  0.5 / (11.2/11.832)

= 0.5/0.9466

= 0.5282.

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)