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LUCKY_DIMON [66]
3 years ago
5

X=y^2-1

Mathematics
1 answer:
vova2212 [387]3 years ago
4 0

Answer:

let me just guess 2x =4

Step-by-step explanation:

yUH yuhbyuh yuh

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A sample of 65 observations is selected from one population with a population standard deviation of 0.75. The sample mean is 2.6
Angelina_Jolie [31]

Answer:

Step-by-step explanation:

The null hypothesis is

H0 : μ1 ≤ μ2

The alternative hypothesis is

H1 : μ1 > μ2

a) it is a one-tailed and also a right tailed test

b) The decision rule is the basis on which the null hypothesis is rejected or not. If 0.08 > p value, reject H0. If 0.08 < p value, do not reject H0.

c) Since the population standard deviations are known, we would use the formula to determine the test statistic(z score)

z = (x1 - x2)/√σ1²/n1 + σ2²/n2

Where

x1 and x2 represents sample means

σ1 and σ2 represents population standard deviations

n1 and n2 represents number of samples

From the information given,

x1 = 2.67

x2 = 2.59

σ1 = 0.75

σ2 = 0.66

n1 = 65

n2 = 50

z = (2.67 - 2.59)/√0.75²/65 + 0.66²/50

= 0.08/√0.00865 + 0.008712

z = 0.61

From the normal distribution table, the probability value corresponding to the z score is 0.73

d) If 0.08 > 0.73, we would reject H0

e) the p-value is 0.73

3 0
3 years ago
ellie brought 60 cookies to class today. 30% of them have mint filing. how many cookies have the mint filling
Elan Coil [88]
So simple.

18. 

If you need help to find why, here's a link

http://www.geteasysolution.com/what-is-30-percent-of-60
5 0
3 years ago
Read 2 more answers
Alicia bought a notebook and several erasers at the student store. The graph shows the relationship between the total cost of he
melomori [17]
<h3><u>Answer:</u></h3>

Option: C is the correct answer.

$ 1.50 is the cost of 1 eraser.

<h3><u>Step-by-step explanation:</u></h3>

Alicia bought a notebook and several erasers at the student store.

Let the cost of 1 eraser=$ x.

Now from the scatter plot we could see that when Alicia did not bought any eraser then her total cost =$ 2.

That means cost of a notebook=$ 2.

Now when she buys a notebook and two eraser then she pays=$ 5.

i.e.

Total cost=cost of notebook+ 2× cost of 1 eraser

Total cost=cost of notebook+2×x

i.e.

5=2+2x

⇒ 2x=5-2

⇒ 2x=3

⇒ x=1.5

Hence, cost of one eraser is:

$ 1.50

6 0
3 years ago
Read 2 more answers
How many sides does a rhombus HAVE? ​
myrzilka [38]
A rhombus has about 4 sides
5 0
3 years ago
Someone please help me asap. I’m confused and need help. Complete the table using the function n = 9b + 19
Mars2501 [29]

answer: you would just substitute all of the values you see for b into the equation where there's a b

5 0
3 years ago
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