Previously, an organization reported that teenagers spent an average of 4.3 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 5.75 hours with a sample standard deviation of 2.0. What are the null and alternate hypotheses

The null hypothesis is .

The alternate hypothesis is

Step-by-step explanation:

Null hypothesis:

The previously report, the known value.

Alternate hypothesis:

What is questioned(higher, lower, different,...) of the null hypothesis

Previously, an organization reported that teenagers spent an average of 4.3 hours per week, on average, on the phone.

This means that the null hypothesis is .

The organization thinks that, currently, the mean is higher.

That is, higher than 4.3. So

The alternate hypothesis is

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm