claim: the mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. for a random sample of 125 adult males, the mean pulse rate is 68.3 bpm and the standard deviation is 11.4 bpm. find the value of the test statistic.

0.6865

Step-by-step explanation:

test statistic is given by the formula

test statistic =

where = mean of the sample

μ= mean

n= sample space

σ= standard deviation

we have given mean of sample   =69

mean μ=68.3

σ=11.4

sample space=125

putting all these value in formula of test statistic

test statistic=

=0.6865

correct answer is infinitely many solutions

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

solving the above equation:

4x + 6 = -4 +4x +10

combining like terms

4x -4x = -4+10-6

0=0

since both sides are 0=0, we end up into true statement it means it has infinite many solutions.

so correct answer is infinitely many solutions

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a