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dimulka [17.4K]
3 years ago
13

The function shown is reflected across the y-axis to create a new function. Which is true about the domain and range of each fun

ction? Both the domain and range change. Both the range and domain stay the same. O The domain stays the same, but the range changes. O The range stays the same, but the domain changes -5 +-3-2-1, 5 X PTP​

Mathematics
1 answer:
Shkiper50 [21]3 years ago
3 0

Answer: D

Step-by-step explanation:

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A random sample of n = 45 observations from a quantitative population produced a mean x = 2.5 and a standard deviation s = 0.26.
oee [108]

Answer:

P-value (t=2.58) = 0.0066.

Note: as we are using the sample standard deviation, a t-statistic is appropiate instead os a z-statistic.

As the P-value (0.0066) 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 population mean μ exceeds 2.4.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the population mean μ exceeds 2.4.

Then, the null and alternative hypothesis are:

H_0: \mu=2.4\\\\H_a:\mu> 2.4

The significance level is 0.05.

The sample has a size n=45.

The sample mean is M=2.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=0.26.

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

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{0.26}{\sqrt{45}}=0.0388

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{2.5-2.4}{0.0388}=\dfrac{0.1}{0.0388}=2.58

The degrees of freedom for this sample size are:

df=n-1=45-1=44

This test is a right-tailed test, with 44 degrees of freedom and t=2.58, so the P-value for this test is calculated as (using a t-table):

P-value=P(t>2.5801)=0.0066

As the P-value (0.0066) 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 population mean μ exceeds 2.4.

7 0
3 years ago
Translate each phrase into a variable expression. use n for the variable
gayaneshka [121]
N + 2 that is correct
8 0
3 years ago
Read 2 more answers
What is the equation of this graph? <br><br>a) x=-7<br>b) y=-7<br>​
sergiy2304 [10]
Since it’s vertical it would be x=-7
4 0
2 years ago
An item is regularly priced at $40 . Milan bought it at a discount of 45% off the regular price. How much did Milan pay?
maw [93]
45%=.45
40*.45=18
40-18=22
8 0
3 years ago
I have another Brainliest reward
Luba_88 [7]
San Antonio to Dallas
65mph with 277 mi
277/ 65 = 4.26 hours
4.26 hours < 4.5 hours
so answer is YES

-----------------
Dallas to San Antonio:  277/4.75 = 58.32 mph
Lubbock to El Paso :    344/4.5 = 76.44 mph
San Antonio to Abilene: 261 / 4.25 = 61.41 mph
Dallas to Abilene: 185 / 3 = 61.67 mph

answer
lowest speed is :
Dallas to San Antonio in 4 3/4 hours


3 0
2 years ago
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