1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena-14-01-66 [18.8K]
3 years ago
12

Please help!!!!!!!!!!!!

Mathematics
2 answers:
Anna [14]3 years ago
8 0

Answer:

5

Step-by-step explanation:

notsponge [240]3 years ago
7 0
From the given figure above
Using phythagoren theorem
TZ

You might be interested in
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the drug company is current
lapo4ka [179]

Using the z-distribution, we have that:

a)

The hypothesis test is:

  • H_0: \mu = 7.4
  • H_1: \mu < 7.4

The p-value is of 0.0668.

The critical value is z^{\ast} = -1.28

b) Since the <u>test statistic is less than the critical value</u> for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

Item a:

At the null hypothesis, it is <u>tested if the mean is of 7.4 minutes</u>, that is:

H_0: \mu = 7.4

At the alternative hypothesis, it is <u>tested if the mean is lower than 7.4 minutes</u>, that is:

H_1: \mu < 7.4

We have the <u>standard deviation for the population</u>, hence, the z-distribution is used.

The test statistic is given by:

z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}

The parameters are:

  • \overline{x} is the sample mean.
  • \mu is the value tested at the null hypothesis.
  • \sigma is the standard deviation of the sample.
  • n is the sample size.

For this problem, the values of the <em>parameters </em>are: \overline{x} = 7.1, \mu = 7.4, \sigma = 1.2, n = 36.

Hence, the value of the <em>test statistic</em> is:

z = \frac{\overline{x} - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{7.1 - 7.4}{\frac{1.2}{\sqrt{36}}}

z = -1.5

Using a z-distribution calculator, the p-value is of 0.0668.

Also using a calculator, considering a <u>left-tailed test</u>, as we are testing if the mean is less than a value, the critical value with a <u>significance level of 0.1</u> is of z^{\ast} = -1.28.

Item b:

Since the <u>test statistic is less than the critical value</u> for the left-tailed test, there is enough evidence to conclude that the null hypothesis will be rejected.

You can learn more about the use of the z-distribution to test an hypothesis at brainly.com/question/16313918

5 0
2 years ago
How many $0.12 pencils can Chloe buy for $4.80?
Natalka [10]

Answer:

40

Step-by-step explanation:

6 0
3 years ago
Find the inverse cotangent of the square root of 3 without a calculator
elena-14-01-66 [18.8K]
Let's use our trigonometric skills to solve for this one:


7 0
3 years ago
50 pointsssss!!!!
Eva8 [605]

17.99mm and ).705 in

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Make the following conversion. 4mm = _____ cm 0.04 0.4 40 400
eimsori [14]

Answer:

10 mm = 1 cm

4 mm = 4/10 cm

=0.4 cm

hope it helps

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is the solution to f(x)=g(x)?
    10·1 answer
  • The Huey family is purchasing a winter cover for their above ground pool, which is rectangular and has dimensions of 18 feet by
    9·1 answer
  • A cell phone company orders 500 new phones from a manufacturer. If the probability of a phone being defective is 2.9%, predict h
    6·2 answers
  • A flare was launched straight up from the ground with an initial velocity of 176 ft/s and returned to the ground after 11 s. The
    8·2 answers
  • Numa pista de treino, três ciclistas
    6·2 answers
  • A builder needs to cover 10 square yards of floor with tile. red tile costs $60 per square yard, and white tole costs $40 per sq
    10·1 answer
  • 2. Find the product using any property 4x7649x25.<br><br>​
    12·1 answer
  • Help help help (11 points)
    10·1 answer
  • N = 3(k + m)<br>Solve for m​
    9·2 answers
  • <img src="https://tex.z-dn.net/?f=3y%20-%205x%20%3D%2010" id="TexFormula1" title="3y - 5x = 10" alt="3y - 5x = 10" align="absmid
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!