A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were determined to be 80 and 14 respectively. The standard error of the mean is

Step-by-step explanation:

The formula for calculating the standard error of the mean is expressed as shown below;

Standard error =

is the standard deviation and n is the sample size.

Given = 14 and n = 100

Substituting this values into the formula fr calculating the standard error of the mean;

Hence, standard error of the mean is 1.4

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)

answer: it's d

step-by-step explanation: