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Vaselesa [24]
3 years ago
10

Item 1

Mathematics
1 answer:
drek231 [11]3 years ago
7 0

Answer:

an= 11 + (n - 1) x -1

a30= -18

Step-by-step explanation:

this is right, trust me

You might be interested in
In a study of cereal leaf beetle damage to oats, researchers measured the number of beetle larvae per stem in small plots of oat
PSYCHO15rus [73]

Answer:

At 0.05 level of significance, there is no difference in the mean number of larvae per stem. This supports the scientist's claim.

(d) H0: MeanMalathion - MeanNoMalathion equals 0

H1: MeanMalathion - MeanNoMalathion not equals 0

Step-by-step explanation:

Test statistic (t) = (mean 1 - mean 2) ÷ sqrt[pooled variance (1/n1 + 1/n2)]

Let the difference between the two means be x and the pooled variance be y

n1 = 5, n2 = 12

t = x ÷ sqrt[y(1/5 + 1/12)] = x ÷ sqrt(0.283y) = x ÷ 0.532√y = 1.88x/√y

Assuming the ratio of x to √y is 0.5

t = 1.88×0.5 = 0.94

n1 + n2 = 5 + 12 = 17

degree of freedom = n1 + n2 - 2 = 17 - 2 = 15

significance level = 0.05 = 5%

critical value corresponding to 15 degrees of freedom and 5% confidence interval is 2.131

The test is a two-tailed test because the alternate hypothesis is expressed using not equal to.

The region of no rejection of the null hypothesis lies between -2.131 and 2.131

Conclusion

Fail to reject the null hypothesis because the test statistic 0.94 falls within the region bounded by the critical values.

The scientist's claim is right.

A null hypothesis is a statement from a population parameter which is either rejected or accepted (fail to reject) upon testing. It is expressed using the equality sign.

An alternate hypothesis is also a statement from a population parameter which negates the null hypothesis and is accepted if the null hypothesis is rejected. It is expressed using any of the inequality signs.

3 0
3 years ago
NEED HELP ASAP! 30 POINTS
MrRissso [65]
Use a calculator survivorguy00
3 0
3 years ago
Write 11/25 and 9/20 so that they can have a common denominator.
sergejj [24]
Multiple 11/25 with 4 and 9/20 with 5 so it will be
44/100 and 45/100
7 0
3 years ago
Read 2 more answers
Find x. (The picture has the info)
qwelly [4]

Answer:

X=5

Step-by-step explanation:

3x+9 is twice of 12 (24). 24-9=15, and 3*5=15, so x=5.

7 0
2 years ago
The table below shows all of the possible outcomes for rolling two six-sided number cubes. A table with 36 possible outcomes. Th
barxatty [35]

The image is missing, we have attached the image.

Answer:

The of getting an even number in first and an odd number second is \frac{1}{4}\ or\ 0.25.

Step-by-step explanation:

Given,

Total number of outcomes = 36

We have to find the probability of rolling an even number first and an odd number second.

Solution,

Firstly we will find out the possible outcomes;

(2,1),\ (2,3),\ (2,5),\  (4,1),\ (4,3),\ (4,5),\ (6,1),\ (6,3),\ (6,5),

So the total number of outcomes = 9

Now according to the formula of probability, which is;

P(E)=\frac{\textrm{total number of possible outcomes}}{\textrm{total number of  outcomes}}

Now on putting the values, we get;

P(of getting an even number in first and an odd number second)=\frac{9}{36}=\frac{1}{4}=0.25

Hence The of getting an even number in first and an odd number second is \frac{1}{4}\ or\ 0.25.

5 0
3 years ago
Read 2 more answers
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