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Alja [10]
3 years ago
9

PLEASE PLEASE PLEASE HELP​

Mathematics
1 answer:
dalvyx [7]3 years ago
6 0

Answer:

some dumb mod deleted my answer because i didnt show work. Who cares about the work everyone just wants the answers.

55.) A.9 B. 29

57.) SAS

Step-by-step explanation:

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The sampling distribution used when making inferences about a single population variance is?
melamori03 [73]

We use the chi-square distribution when making inferences about a single population variance.

Short Description of Chi-Square Distribution

The continuous probability distribution known as the chi-square distribution. The number of degrees of freedom (k) a chi-square distribution has determines its shape. This type of sampling distribution has a variance of 2k and a mean equal to its number of degrees of freedom (k). The range is of a chi-square distribution is from 0 to ∞.

Variance plays a key role in the analysis of risk and uncertainty. The sample variance, an unbiased estimator of population variance, is expressed by the following formula of core statistic for a sample size 'n' and Y' as the sample mean:

S² = ∑(Yₓ - Y') / (n-1)

The formula, (n-1)S² / σ² has the central chi-square distribution as χ²ₙ₋₁. Here (n-1) represents the degrees of freedom.

Learn more about chi-square distribution here:

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4 0
1 year ago
Can someone pls help
REY [17]

Answer:

a,c,e,f

Step-by-step explanation:

scientific notations can only be less than 9

7 0
2 years ago
Write the number 11 as a fraction with the denominator of 15.
Elanso [62]

Answer:

11/15

there ya go!!

Step-by-step explanation:

4 0
2 years ago
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If the farmers market sold 35% of its produce and has 280 peaches remaining, how many peaches did it have?
PSYCHO15rus [73]

100-35 = 65%

280/0.65 = 430

 he had 430 peaches


3 0
3 years ago
April has 40 cookies to make for upcoming bake sale. she made 3/5 of the cookies chocolate chip and 1/4 of them peanut butter. H
Vikki [24]
30 chocolate chip and 10 peanut butter
5 0
3 years ago
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