NEED HELP ASAP PLEASEEE

What's the square root of 2 rounded to the nearest tenth ?

Alika [10]

1.40 or 1.4 would be the square root of 2

3 0

3 years ago

The mean annual premium for automobile insurance in the United States is $1,499. Being from Pennsylvania, you believe automobile

timama [110]

Answer:

a) Then, t(s) is in the rejection region. We can not support that the mean annual premium in Pennsylvania is lower than the national mean annual premium

b) The point estimate of the difference is 59 $

Step-by-step explanation:

From sample we get:

sample size n = 25

annual mean x = 1440

standard deviation of the sample s = 150

mean for the mean annual premium μ = 1499

Hypothesis Test:

Null Hypothesis H₀ x = μ

Alternative Hypothesis Hₐ x < μ

Alternative Hypotesis indicates that the test is a one-tail test to the left

Let´s assume confidence Interval 95 % then α = 5 % α = 0.05

As n < 30 and we assume normality we will make a t-student test

degree of freedom df = n - 1 df = 24

With df = 24 and α = 0.05 and from t-student table we get t(c) = - 1.711

To calculate t(s) we apply:

t(s) = ( x - μ ) / s/√n

t(s) = ( 1440 - 1499 ) * 5 / 150

t(s) = - 59/ 30

t(s) = - 1.96

Comparing t(s) and t(c)

|t(s)| > |t(c)|

Then, t(s) is in the rejection region. We can not support that the mean annual premium in Pennsylvania is lower than the national mean annual premium.

b) The point estimate for the difference is : x - μ = 59 $

3 0

3 years ago

The rectangular diagram shows the design for a tood

Ksivusya [100]

Answer:

Step-by-step explanation:

What diagram?

8 0

3 years ago

a boy is standing on a pole of height 14.7m throws a stone upwards. it moves in a vertical line slightly away from the pole and

fomenos

Answer:

The time taken for the upward motion is 1 second. The same time is taken for the downward motion

It reaches a maximum height of 4.9 meters.

Step-by-step explanation:

The equation of motion is:

$x(t) = -4.9t^{2} + 9.8t$

Since the term which multiplies t squared is negative, the graph is concave down, that is, x increases until the vertex, where it reaches it's maximum height, then it decreases.

Vertex of a quadratic equation:

Quadratic equation in the format $x(t) = at^{2} + bt + c$