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postnew [5]
3 years ago
8

The correct way to use a seat belt is

Mathematics
2 answers:
serg [7]3 years ago
8 0
The answer is A across your hips & body over collar bone
tresset_1 [31]3 years ago
6 0
The answer is A
hope i helped
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Find the simple interest on#24000 at 5% per annum for a period of 4 years ​
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3 years ago
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Someone claims that the average amount of time that a freshman at TAMU studies is 7 hours. We think it’s higher than that and de
Stels [109]

Answer:

Test statistic t = 5.25

P-value = 0.000002 (one-tailed test)

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average amount of time that a freshman at TAMU studies is significantly higher than 7 hours.

Then, the null and alternative hypothesis are:

H_0: \mu=7\\\\H_a:\mu> 7

The significance level is 0.05.

The sample has a size n=49.

The sample mean is M=8.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=√s^2=√4=2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{2}{\sqrt{49}}=0.29

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{8.5-7}{0.29}=\dfrac{1.5}{0.29}=5.25

The degrees of freedom for this sample size are:

df=n-1=49-1=48

This test is a right-tailed test, with 48 degrees of freedom and t=5.25, so the P-value for this test is calculated as (using a t-table):

\text{P-value}=P(t>5.25)=0.000002

As the P-value (0.000002) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the average amount of time that a freshman at TAMU studies is significantly higher than 7 hours.

6 0
3 years ago
What is CPCTC in analyzing triangle relationships?
monitta

Answer:

Exercises Use the Plan for Proof to write a two-column proof.

Step-by-step explanation:

7 0
2 years ago
Determine whether the study depicts an observational study or a designed experiment. A poll is conducted in which 574 high schoo
Anna35 [415]

Answer:  observational study

Step-by-step explanation:

Observational study : A study in which an observer analyse one or more characteristics of a population (depends on the objective of the study) by just observing the individuals in a sample of the population, but he / she never  influence the variables of interest.

Design experiment : In this experimenter design an experiment with a series of tests to check the change in the dependent variable. Here , the experimenter influences the variables of interest.

Given : A poll is conducted in which 574 high school students are asked about how often they listened to music during the past week.

here , the poll is just observing the interest of students instead of influencing them.

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4 0
3 years ago
What is the difference of the following polynomials?
Snowcat [4.5K]
(6x^3-2x^2+4) <span>- (2x^3+4x^2-5)

Subtract the like terms

6x^3 - 2x^3 = 4x^3

-2x^2 - 4x^2 = -6x^2

4 - (-5) = 9

The final answer would be

4x^3 - 6x^2 + 9

</span>
5 0
3 years ago
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