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vitfil [10]
3 years ago
11

Use division to determine whether the ratios form a proportion.

Mathematics
1 answer:
hoa [83]3 years ago
3 0
Yes, they form a proportion. It would be 6/6 or 1.
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On a number line, what number is 2/3 of the way from 7 to 13?
notka56 [123]

Answer:

That would be about 11.667

8 0
3 years ago
What’s the ratio of the distance?
Alik [6]

Answer:

B (2,8)

Step-by-step explanation:

7 0
3 years ago
A study is performed in San Antonio to determine whether the average weekly grocery bill per five-person family in the town is s
bogdanovich [222]

Answer:

No, the sample evidence is not statistically significant (P-value = 0.125).

To reject the null hypothesis, the P-value has to be smaller than the significance level, so the significance level to reject the null hypothesis has to be 0.125 or higher.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

Then, the null and alternative hypothesis are:

H_0: \mu=131\\\\H_a:\mu\neq 131

The significance level is 0.05.

The sample has a size n=50.

The sample mean is M=133.474.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=11.193.

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

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{11.193}{\sqrt{50}}=1.583

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{133.474-131}{1.583}=\dfrac{2.474}{1.583}=1.563

The degrees of freedom for this sample size are:

df=n-1=50-1=49

This test is a two-tailed test, with 49 degrees of freedom and t=1.563, so the P-value for this test is calculated as (using a t-table):

P-value=2\cdot P(t>1.563)=0.125

As the P-value (0.125) is bigger than the significance level (0.05), the effect is  not significant.

The null hypothesis failed to be rejected.

There is not enough evidence to support the claim that the average weekly grocery bill per five-person family in San Antonio is significantly different from the national average.

8 0
3 years ago
Find the mean and median of the data. <br><br> 4.7,8.51,6.5,7.42,9.64,7.2,9.3
Murrr4er [49]

Answer:

Population size: 7

Median: 7.42

Minimum: 4.7

Maximum: 9.64

First quartile: 6.5

Third quartile: 9.3

Interquartile Range: 2.8

Outliers: none

5 0
3 years ago
Evaluate the expression. If necessary, round to the nearest hundredth. lne
Kobotan [32]
Lne equals 1 because they cancel each other out. e is the base of ln. 
For example: log has a base of 10, log10 = 1
5 0
3 years ago
Read 2 more answers
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