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3 years ago

Help please i will give brainiest

Mathematics

1 answer:

liraira [26]3 years ago

6 0

Answer:

4.5

Step-by-step explanation:

Mean = (4+5+6+3)/4 = 4.5 bubbles

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When a particular type of thumbtack is dropped, it will land point up (A flat-top thumbtack resting on its flat top) or point

erma4kov [3.2K]

Answer:

0.48

0.52

Yes

Step-by-step explanation:

Result of experiment :

Point up = 48

Point down = 52

Total number of trials = 100

Recall :

Experimental probability = number of outcomes / number of trials

1.)

P(Landing point up) = 48 / 100 = 0.48

2.)

P(Landing point down) = 52 / 100 = 0.52

3.)

The same result will not occur has the outcomes of trials aren't fixed.

4.) Yes, nearly the same result could occur on the second trial, as the number of possible outcubes are just 2 and the number if trials is high.

8 0

3 years ago

An experiment using 35 guinea pigs is set up to study the weight of the pigs after injecting them with a drug. If the population

jeka94

Answer:

1.1264

Step-by-step explanation:

Given : An experiment using 35 guinea pigs is set up to study the weight of the pigs after injecting them with a drug.

To Find: If the population mean is 23.5 grams with a standard deviation of 3.4 grams, what is the margin of error of the sample mean?

Solution:

n = 35

$\sigma = 3.4$

Confidence interval = 95%. So, z =1.96

Margin of error = $z \times \frac{\sigma}{\sqrt{n}}$

Margin of error = $1.96\times \frac{3.4}{\sqrt{35}}$

Margin of error = $1.1264$

Hence the margin of error of the sample mean is 1.1264.

6 0

3 years ago

Read 2 more answers

Round 39.472 to the nearest tenth

MrRissso [65]

The answer is 39.470 because 39.472 is far from 39.450 and it’s 2 numbers passed 39.470.

3 0

3 years ago

What is the sum of -15 and -8 increased by 20?

natta225 [31]

-15+-8
-15-8
-23+20
-3
This is your answer boiiii or giiirlll

6 0

3 years ago

Isabel is saving money to buy a game. The game costs $30, and so far she has saved two-thirds of this cost. How much money has I

yan [13]

Answer: 20 $

divide 30 by $\frac{2}{3}$

30 / $\frac{2}{3}$ = 20

she has saved 20 $ so far

3 0

3 years ago