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labwork [276]
3 years ago
12

At most 42% of car crashes occur within 2 miles of the motorists home. Express the null and alternative hypotheses in symbolic f

orm for this claim (enter as a percentage). H 0 : p =42% Correct H 1 : p >=42% Incorrect Use the following codes to enter the following symbols: ≥ enter >= ≤ enter <= ≠ enter !=
Part B)You are performing a two-tailed test. If α = .001 , find the positive critical value, to three decimal places. zα/2 =
Mathematics
1 answer:
8_murik_8 [283]3 years ago
6 0

Answer:

A)H_{0}: p \leq 0.42\\H_A: p > 0.42

B)

z_{critical} \text{ at 0.001 level of significance } = \pm 3.291

Step-by-step explanation:

A) We are given the following in the question:

At most 42% of car crashes occur within 2 miles of the motorists home

p = 42% = 0.42

We design the null and the alternate hypothesis  in the following manner:

H_{0}: p \leq 0.42\\H_A: p > 0.42

At most 42% of car crashes occur within 2 miles of the motorists home which means car crashes should be less than equal to 42% but not greater than 42%.

The null hypothesis sates that 42% or less car crashes occur within 2 miles of the motorists home.

The alternate hypothesis state that more than 42% of car crashes occur within 2 miles of the motorists home.

B) We have to find the value of z critical for given conditions

We are performing a two tailed test.

Alpha, α = 0.001

Calculating the z value from the standard z-table. We find the value from the table under the level of significance 0.001

The value obtained is used as the acceptance region for the null hypothesis.

The obtained acceptance region can be written as:

z_{critical} \text{ at 0.001 level of significance } = \pm 3.291

If the calculated z score lies in this region we accept the null hypothesis. If not we reject the null hypothesis.

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Write the equation of the line in fully simplified slope-intercept form.
mart [117]

Answer:

y= -3x-6

Step-by-step explanation:

I believe this is correct

6 0
11 months ago
Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation h = -16t2 + 72t +
boyakko [2]

Answer:

  about 5.613 seconds

Step-by-step explanation:

Using the quadratic formula to find the value of t when h = 0, we have ...

  at² +bt +c = 0

  t = (-b±√(b²-4ac))/(2a)

  t = (-72±√(72² -4(-16)(100)))/(2(-16))

  t = (-72±√11584)/-32 = (9±√181)/4

Only the positive value of t is of interest.

  The coin will hit the stream after (9+√181)/4 seconds ≈ 5.613 seconds.

4 0
3 years ago
Translate the verbal expression "Five less than the product of X and three" into an algebraic expression
Illusion [34]

Answer:

x+3-5 i think

Step-by-step explanation:

"and" means add so x+3 and subtract 5

6 0
2 years ago
Christine performed the following experiment 20 times using a book that contains 462 pages.
wel

Using the probability concept, it is found that there is a 0.3 = 30% experimental probability that Christine will randomly choose a page that is divisible by 3.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

In an experimental probability, these number of outcomes are taken from previous trials.

In this problem:

  • The experiment was made 20 times.
  • Of those, in 6 experiments(81, 105, 171, 159, 297, 387) she choose a page that was divisible by 3.

Then:

p = \frac{6}{20} = 0.3

0.3 = 30% experimental probability that Christine will randomly choose a page that is divisible by 3.

You can learn more about the probability concept at brainly.com/question/15536019

7 0
2 years ago
HELP QUICK PLEASE!!
Ksenya-84 [330]

Answer:

2

it is very clear and understandable

7 0
3 years ago
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