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Volgvan
3 years ago
11

Ms. Medina's math class has 15 students in total. In her class 9 of the students are boys. Which

Mathematics
1 answer:
PIT_PIT [208]3 years ago
6 0

Answer:

6

Step-by-step explanation:

15 - 9

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We measure the diameters for a random sample of 25 oak trees in a neighbourhood. Diameters of oak trees in the neighbourhood fol
jarptica [38.1K]

Answer:

The required confidence inteval = 94.9%.

Step-by-step explanation:

Confidence interval: Mean ± Margin of error

Given: A confidence interval for the true mean diameter of all oak trees in the neighbourhood is calculated to be (36.191, 42.969).

i.e.  Mean + Margin of error = 42.969               (i)

Mean - Margin of error = 36.191                    (ii)

Adding (i) and (ii), we get

2Mean =79.16\\\\\Rightarrow\ Mean= 39.58

Margin of error = 42.969-39.58             [from (i)]

= 3.389

Margin of error = t^* \dfrac{\sigma}{\sqrt{n}}

here n= 25 , \ \sigma=8.25

i.e.

3.389=t^*\dfrac{8.25}{5}\\\\\Rightarrow\ t^* = \dfrac{3.389}{1.65}\\\\\Rightarrow\ t^* =2.0539 \

Using  excel function 1-TDIST.2T(2.054,24)

The required confidence inteval = 94.9%.

7 0
3 years ago
Lucy’s house is located at the point shown on the coordinate grid. Ainsley’s house is located 2 units right and 3 units down fro
dybincka [34]

Answer: 3,3

Step-by-step explanation:

5 0
3 years ago
In a recent year, 22 percent of email users said they spend less time using email because of spam. what fraction of email users
Alchen [17]
Remember, percent is always out of 100. If you have 22%, you have 22 people per every 100 people, or, 22/100. 

22/100 is the incomplete answer because it needs to be simplified. If you divide both numbers by two you get 11/50 which is the lowest fraction you can have because 11 is a prime number.
5 0
3 years ago
The equation 320=x+7.50(36) represents the cost of ordering potted plants at a second store.
anygoal [31]

Answer:

I would say it's the amount of potted plants.

Step-by-step explanation:

x is the independent variable and y is the dependent variable. Y counts on x, so total cost counts on the amount of potted plants.

3 0
3 years ago
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The local bakery uses 1.75 cups of flour in each batch. The bakery used 5.35 cup of flour this morning. If there are 5 dozen coo
mr Goodwill [35]
5 dozen = 5x12 = 60 per batch
60x3 =180 cookies in total.
6 0
3 years ago
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