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
tangare [24]
2 years ago
8

Guys, Take a look at the screenshot below, do you understand this problem? If you do so, please tell me the answer!

Mathematics
2 answers:
NISA [10]2 years ago
8 0

Answer:

there is no screenshot or I just can't see it

ANEK [815]2 years ago
7 0
There’s no screenshot srry
You might be interested in
A researcher was interested in comparing the resting heart rate of people who exercise regularly and people who do not exercise
alekssr [168]

Answer:

t=\frac{(73.5-69.3)-0}{\sqrt{\frac{10.2^2}{16}+\frac{8.7^2}{12}}}}=1.173  

Using the critical value method we need to find a critical value in the t distribution who accumulates 0.025 of the area on the right and we got:

t_{cric}= 2.06

So then since our calculated value is lower then the critical value we fail to reject the null hypothesis and we can't conclude that the true mean resting pulse rate of people who do not exercise regularly is larger than the mean resting pulse rate of people who exercise regularly.

Step-by-step explanation:

Information given

\bar X_{1}=73.5 represent the mean for sample of people who do not exercise

\bar X_{2}=69.3 represent the mean for sample of people who do exercise

s_{1}=10.2 represent the sample standard deviation for 1  

s_{2}=8.7 represent the sample standard deviation for 2  

n_{1}=16 sample size for the group 1

n_{2}=12 sample size for the group 2

\alpha=0.01 Significance level

t would represent the statistic

System of hypothesis

We want to verify if the mean resting pulse rate of people who do not exercise regularly is larger than the mean resting pulse rate of people who exercise regularly, the system of hypothesis would be:  

Null hypothesis:\mu_{1}-\mu_{2} \leq 0  

Alternative hypothesis:\mu_{1} - \mu_{2}> 0  

The statistic for this case would be given by:

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

The degrees of freedom are given by:

df=n_1 +n_2 -2=16+12-2=26  

Replacing the info given we got:

t=\frac{(73.5-69.3)-0}{\sqrt{\frac{10.2^2}{16}+\frac{8.7^2}{12}}}}=1.173  

Using the critical value method we need to find a critical value in the t distribution who accumulates 0.025 of the area on the right and we got:

t_{cric}= 2.06

So then since our calculated value is lower then the critical value we fail to reject the null hypothesis and we can't conclude that the true mean resting pulse rate of people who do not exercise regularly is larger than the mean resting pulse rate of people who exercise regularly.

6 0
3 years ago
Which is greater 5 8/10 or 58/10
NARA [144]
This is a trick question. the answer is neither, they are both equivalent to one another :)
8 0
3 years ago
Write an expression that represent the product of q and 8, divided by 4
igomit [66]
Q8 (division sign) 4


sorry my macbook doesn't have a division sign
8 0
3 years ago
Read 2 more answers
Using the Pythagorean Theorem, give an example of three sides of a right triangle
VikaD [51]

Answer:

Two legs and an hypotenuse

Step-by-step explanation:

Isn’t that what your looking for?

8 0
3 years ago
Solve for x: -4(x + 10) - 6 = -3(x - 2
evablogger [386]
-4(x+10)-6=-3(x-2)
-4x-40-6=-3x+6
-4x-46=-3x+6
-4x-46+46=-3x+6+46
-4x=-3x+52
-4x+3x=-3x+3x+52
-x=52
(-x/-1)=(52/-1)
x=-52
6 0
3 years ago
Read 2 more answers
Other questions:
  • I need help again lol(picture is question)
    13·1 answer
  • the united states uses 24%of the worlds supply of energy.what fraction of the worlds energy is this??
    9·1 answer
  • The graph below shows a line of best fit for the relationship between the number of tickets that Brittany has and the number of
    7·2 answers
  • In the figure, ABC is mapped onto XYZ by a 180° rotation. Angle B corresponds to which angle in XYZ?
    8·1 answer
  • Lana got a tip of 16%, or 0.16For delivering pizzas for the party if the total bill for the pizza was $98.19 about how much was
    13·1 answer
  • You get a $125.85 discount on a TV that originally cost $945. What percent
    10·1 answer
  • 1.A company charges an extra 5% for customers using their credit card. Sally buys a dress for £24. If Sally uses her credit card
    11·2 answers
  • Suppose you invest $3,500 in a savings account that earns 7% Interest, compounded
    7·1 answer
  • 1. There are 324 fourth grade students at Lincoln Elementary School. There are 12 fourth grade classrooms. How many students wil
    9·1 answer
  • Solve the equation: 2 (x + 2x) - 36<br> A) X=-18<br> B) x = 18<br> cx = -6<br> D) x = 6
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!