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pshichka [43]
3 years ago
11

P is the product of 7 to the sum of 3 and 9

Mathematics
1 answer:
Colt1911 [192]3 years ago
5 0
The equation: P×7+3+9
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Jane was asked to find the factors of 8. Here is her work: 8 × 1 = 8 8 × 2 = 16 8 × 3 = 24 Factors of 8: 8, 16, 24 Which stateme
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Jane found multiples of 8.

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zvonat [6]

x = r sin θ cos Ф

x² = r² sin² θ cos² Ф

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7 0
3 years ago
In one area, monthly incomes of technology-related workers have a standard deviation of $650. It is believed that the standard d
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Answer:

There is sufficient statistical evidence to prove that the standard deviation of the technology-related workers and the standard deviation of the non-technology workers are equal.

Step-by-step explanation:

Here we have our null hypothesis as H₀: σ² = s²

Our alternative hypothesis is then Hₐ: σ² ≠ s²

We therefore have a two tailed test

To test the hypothesis of difference in standard deviation which is the Chi squared test given as follows

\chi ^{2} = \dfrac{\left (n-1  \right )s^{2}}{\sigma ^{2}}

Where:

n = Size of sample

s² = Variance of sample = 950²

σ² = Variance of population = 650²

Degrees of freedom = n - 1 = 71 - 1 = 70

α = Significance level = 0.1

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From the Chi-square table, we have the critical value as

1 - α/2 = 51.739,  

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Plugging the values in the above Chi squared test equation, we have;

\chi ^{2} = \dfrac{\left (23-1  \right )950^{2}}{650 ^{2}} = 49.994

Therefore, since the test value within the critical region, we do not reject the null hypothesis, hence there is sufficient statistical evidence to prove that the standard deviation of the technology-related workers and the standard deviation of the non-technology workers are equal.

6 0
2 years ago
Which number does 9 have a value that is 1/10 times as small as it’s value in 891
Arisa [49]

Answer:

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H T U

8. 9. 1

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