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2 years ago

Can someone help me out my grades are bad

Mathematics

1 answer:

disa [49]2 years ago

7 0

Answer:

= 2700

Step-by-step explanation:

1300+700+700

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Listed below are speeds (mi/h) measured from southbound traffic on I-280 near Cupertino, California (based on data from SigAlert

adell [148]

Answer:

Option (B) is the correct answer to the following question.

Step-by-step explanation:

Step-1: We have to find the Mean of the series.

The series is Given in the question 62 61 61 57 61 54 59 58 59 69 60 67.

$Mean(\overline{x})=\frac{62+61+61+57+61+54+59+58+59+69+60+67}{12}$ $= 60.67$

Step-2: We have to find the Standard Deviation.

Let Standard Deviation be x.

Formula of Standard Deviation is: $s= \sqrt{\frac{\sum(x_{i}+\overline{x})}{n-1}}$

Put value in formula of Standard Deviation,

$s= \sqrt{\frac{(62+60.67)^{2}+(61+60.67)^{2}+(61+60.67)^{2}+(57+60.67)^{2}+....(67+60.67)^{2}}{n-1}}$ = 40.75

Step-3: Then, we have to find the critical value by chi-square.

$X_{1-\alpha/2}^{2}=3.82$

$X_{1-\alpha/2}^{2}=21.92$

Then, find the confidence interval which is 95%.

$\sqrt{\frac{(n-1).s^2}{X_{\alpha/2}^{2}} } = \sqrt{\frac{12-1}{21.92}.(4.075)^2 }\approx2.8868 \\ i.e 2.9$

$\sqrt{\frac{(n-1).s^2}{X_{\alpha/2}^{2}} } = \sqrt{\frac{12-1}{3.816}.(4.075)^2 }\approx6.9188 \\ i.e 6.9$

5 0

3 years ago

Whoever answers this will get a cookieeeeeee (btw the first one is wrong, this is my 2nd attempt)

Juli2301 [7.4K]

Answer:

the answer is c

Step-by-step explanation:

7 0

2 years ago

Pls I need help on this one

OlgaM077 [116]

Answer:

1.5 for half a batch and 1 and 0.16666666.. batch

Step-by-step explanation:

3 cups=1 batch so 3/2= 1.5 cups=1/2 batch

4 cups=1 and .1666 batches

5 0

3 years ago

Steve saw 313 birds during a bird-watching trip to Yellowstone National park. He observes 15 more trumpeter swans than sandhill

Bogdan [553]

Answer:

15 bbb

Step-by-step explanation:

you add them to 8

5 0

2 years ago

Robert collected 330 aluminum cans. If 100 aluminum cans weigh 4 pounds, and the recycling center is paying 25 cents a pound, ho

labwork [276]

First, determine the weight of 330 cans with the given conditions,
(330 cans) x (4 lbs / 100 cans) = 13.2 lbs
Then, the price is determined by multiplying this weight to the price that the recycling center is paying,
(13.2 lbs) x (25 cents / lb) = 330 cents = $3.3
Thus, Robert will be paid $3.3.

4 0

2 years ago