Suppose that weekly use of gasoline for motor vehicle travel by adults in north america follows a distribution with a mean of 20 gallons and a standard deviation of 6 gallons. now, suppose a random sample of 45 adults is taken and the average amount of gas used each week is 18.2. what is the shape, mean and standard deviation of the sampling distribution of the sample mean?

okay so the mean is in the middle youll take all your number, add them up and then divide by the number you added

ex 5+7+9+10=31/4

Step-by-step explanation:

answer: h

step-by-step explanation:

m∠cdf = 43° , m∠gdf = 114°, m∠gde = 23°, m∠edh = 23° , m∠cdh = 157°

step-by-step explanation:

since, it is given that de bisects the angle gdh ⇒ de divides the angle gdh into two equal angles.

⇒ m∠gde = m∠edh

⇒ 8·x   - 1 = 6·x + 5

⇒ x = 3

so, m∠gde = 8·x - 1 = 23°

and m∠edh = 23°

now, it is given ∠cde is an straight angle so, m∠cde = 180°

⇒ m∠cdf + m∠fdg + m∠gde = 180°

⇒ 43° + m∠fdg + 23° = 180°

⇒ m∠fdg = 114°

again, m∠cde = m∠cdh + m∠edh = 180°

m∠cdh + 23° = 180°

⇒ m∠cdh = 157°