1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
const2013 [10]
3 years ago
5

A time series that shows a recurring pattern over one year or less is said to follow a Select one:______

Mathematics
1 answer:
zaharov [31]3 years ago
3 0
The answer is C. Seasonal pattern
You might be interested in
Doug ordered a circular pizza. The length of the edge of each slice from the crust to the center is 9 inches. What is the area o
taurus [48]
253.47 inches! hope that helps.
3 0
3 years ago
Read 2 more answers
7(x – 3) – 5(2x - 4) = 5​
WITCHER [35]

Answer:

-2

Step-by-step explanation:

7x-21-10x+20=5

7x-10x-1=5

-3x=5+1

x=-6/3

x=-2

7 0
3 years ago
Read 2 more answers
It is 4 1/2 miles to the end of the trail. If Sophia bikes to the end and back in 60 minutes, what is her average speed in miles
PtichkaEL [24]
60 minutes for 2 times of 4.5 miles

60 minutes for 9 miles.

9 miles/60 minutes = 9 miles/1 hour

9 mph
4 0
3 years ago
How to find the measure of a arc in a circle
Karo-lina-s [1.5K]

Answer:

using the (pi) which is the formula

8 0
3 years ago
Read 2 more answers
To compare two programs for training industrial workers to perform a skilled job, 20 workers are included in an experiment. Of t
nikklg [1K]

Answer:

t=\frac{19.1-23.3}{\sqrt{\frac{4.818^2}{10}+\frac{5.559^2}{10}}}}=-1.805  

p_v =P(t_{(18)}

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude the the true mean for method 1 is lower than the mean for the method 2 at 5% of significance

Step-by-step explanation:

Data given and notation

We can calculate the sample mean and deviation with these formulas:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

s= \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

\bar X_{1}=19.1 represent the mean for the sample mean for 1

\bar X_{2}=23.3 represent the mean for the sample mean for 2

s_{1}=4.818 represent the sample standard deviation for the sample 1

s_{2}=5.559 represent the sample standard deviation for the sample 2

n_{1}=10 sample size selected 1

n_{2}=10 sample size selected 2

\alpha represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

p_v represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the average time taken when training under method 1 is less than the average time for Method 2, the system of hypothesis would be:

Null hypothesis:\mu_{1} \geq \mu_{2}

Alternative hypothesis:\mu_{1} < \mu_{2}

If we analyze the size for the samples both are less than 30 so for this case is better apply a t test to compare means, and the statistic is given by:

t=\frac{\bar X_{1}-\bar X_{2}}{\sqrt{\frac{s^2_{1}}{n_{1}}+\frac{s^2_{2}}{n_{2}}}} (1)

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine whether the means of two groups are equal to each other".

Calculate the statistic

We can replace in formula (1) the info given like this:

t=\frac{19.1-23.3}{\sqrt{\frac{4.818^2}{10}+\frac{5.559^2}{10}}}}=-1.805  

P-value

The first step is calculate the degrees of freedom, on this case:

df=n_{1}+n_{2}-2=10+10-2=18

Since is a one sided test the p value would be:

p_v =P(t_{(18)}

Conclusion

If we compare the p value and the significance level assumed \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can conclude the the true mean for method 1 is lower than the mean for the method 2 at 5% of significance

4 0
3 years ago
Other questions:
  • The length of a rectangle is five times its width. If the perimeter is at most 96 centimeters, what is the greatest possible val
    15·1 answer
  • Jordan brought 198 stickers what are different combinations of stickers he could purchase
    14·1 answer
  • Hey can somebody help me this is due tomorrow!!??
    8·2 answers
  • 382.993 to the nearest hundredth is what?
    11·2 answers
  • 300 + 40 + 7/10 + 5/100 + 3/1000
    8·2 answers
  • Change the following fractions to Improper Fractions
    15·2 answers
  • What could be shown about the diagonals of parallelogram PQRS to compare the proof that diagonals of a parallelogram bisect each
    10·1 answer
  • Pls help. (Use answers below)
    14·2 answers
  • ILL BRAINLIEST YOU PLEASE HELP ME
    9·1 answer
  • Que es 9+10<br> A.) 45<br> B.) 19<br> C.) 21<br> D.) 24
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!