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
Alekssandra [29.7K]
3 years ago
14

Help me on this please

Mathematics
1 answer:
KonstantinChe [14]3 years ago
7 0

Answer:

14.387

Step-by-step explanation:

You might be interested in
I WILL GIVE BRAINLIEST
Tom [10]

Step-by-step explanation:

9/8 × (-7/3) =

9 × -7 = -63

8 × 3 = 24

-63/24 simplify

-21/8

7 0
3 years ago
Five students from the 90 students in your class not running for class
trapecia [35]
The answer is 7859
I did it and got it right.....
5 0
3 years ago
The following graph indicates a _______________.
inna [77]
Bfh ju yrdfhjjgfjkiytdcbnkl
4 0
2 years ago
A sociologist was investigating the ages of grandparents of high school students. From a random sample of 10 high school student
umka2103 [35]

Answer:

(69.8-71.6) -2.101 \sqrt{\frac{8.38^2}{10} +\frac{6.65^2}{10}}= -8.908  

(69.8-71.6) +2.101 \sqrt{\frac{8.38^2}{10} +\frac{6.65^2}{10}}= 5.308  

So then the confidence interval for the difference of means is given by:

-8.908 \leq \mu_M -\mu_F \leq 5.308

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X_{M}= 69.8 represent the mean for the age of grandmother

\bar X_{F}= 71.6 represent the mean for the age of grandfather

s_{M}= 8.38 represent the sample deviation for the age of grandmother

s_{F}= 6.65 represent the sample deviation for the age of grandfather

n_M = n_F= 10

Solution to the problem

For this case the confidence interval is given by:

(\bar X_{M} -\bar X_F) \pm t_{\alpha/2} \sqrt{\frac{s^2_M}{n_M} +\frac{s^2_F}{n_F}}

In order to calculate the critical value t_{\alpha/2} we need to find first the degrees of freedom, given by:

df=n_M +n_F-2=10+10-2=18

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,18)".And we see that t_{\alpha/2}=2.101

And replacing we got:

(69.8-71.6) -2.101 \sqrt{\frac{8.38^2}{10} +\frac{6.65^2}{10}}= -8.908  

(69.8-71.6) +2.101 \sqrt{\frac{8.38^2}{10} +\frac{6.65^2}{10}}= 5.308  

So then the confidence interval for the difference of means is given by:

-8.908 \leq \mu_M -\mu_F \leq 5.308

5 0
3 years ago
Determine whether the lines are parallel, perpendicular, or neither. <br> x = 3<br> and y = 4
Katyanochek1 [597]
I think they’re perpendicular lines
5 0
3 years ago
Other questions:
  • Sean is helping his dad build a tiled walkway in their backyard. The walkway will be 60 feet long and 2 feet wide. The local har
    15·2 answers
  • What is the probability of rolling back to back evens?
    5·1 answer
  • Greg's football team played 16 games this season and won 12 of them.
    15·2 answers
  • What are the vertex, axis of symmetry, maximum or minimum value, and range of y = 3x^2 + 6x − 1?
    8·1 answer
  • How many centimeters are in a meter?how many millimeters are in a meter?
    7·1 answer
  • Find the length of the missing side. the triangle not drawn to scale. (Image attached)
    12·2 answers
  • Find the x - intercept and y -intercept of the line. 7x+3y=-21​
    15·1 answer
  • The total cost of eight pens and five mechanical pencils is $8.55. The cost of each pencil is $0.35 cents. Let the cost of a pen
    5·1 answer
  • HURRY URGENT IM TIMED I NEED HELP THESE ARE ALL THE POINTS I HV PLEASE HELP!!!!!!!!!!1 I WILL MARK BRAINLIEST PLEASE I NEED HELP
    13·1 answer
  • Can someone help me with this please.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!