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
Lady bird [3.3K]
3 years ago
9

What is thirty-four and twelve hindredths in expanded form?

Mathematics
1 answer:
strojnjashka [21]3 years ago
6 0
The answer is two hundred thirty four.
You might be interested in
Select ALL of the lines that contain the point (1,6)
Inessa [10]

Answer:

Are there an A,B,C, and D<?

Step-by-step explanation:

4 0
3 years ago
Land's Bend sells a wide variety of outdoor equipment and clothing. The company sells both through mail order and via the intern
Naya [18.7K]

Answer:

80% confidence interval for the true mean difference between the mean amount of mail-order purchases and the mean amount of internet purchases (\mu_1-\mu_2) is [-9.132 , 23.332].

Step-by-step explanation:

We are given that a random sample of 7 sales receipts for mail-order sales results in a mean sale amount of $81.70 with a standard deviation of $18.75.

A random sample of 11 sales receipts for internet sales results in a mean sale amount of $74.60 with a standard deviation of $28.25.

Firstly, the Pivotal quantity for 80% confidence interval for the difference between population means is given by;

                            P.Q. =  \frac{(\bar X_1-\bar X_2)-(\mu_1-\mu_2)}{s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } }  ~ t__n__1-_n__2-2

where, \bar X_1 = sample mean sales receipts for mail-order sales = $81.70

\bar X_2 = sample mean sales receipts for internet sales = $74.60

s_1 = sample standard deviation for mail-order sales = $18.75

s_2 = sample standard deviation for internet sales = $28.25

n_1 = size of sales receipts for mail-order sales = 7

n_2 = size of sales receipts for internet sales = 11

Also, s_p=\sqrt{\frac{(n_1-1)s_1^{2} +(n_2-1)s_2^{2} }{n_1+n_2-2} } = \sqrt{\frac{(7-1)\times 18.75^{2} +(11-1)\times 28.25^{2} }{7+11-2} } = 25.11

<em>Here for constructing 80% confidence interval we have used Two-sample t test statistics as we don't know about population standard deviations.</em>

<em />

So, 80% confidence interval for the difference between population means, (\mu_1-\mu_2) is ;

P(-1.337 < t_1_6 < 1.337) = 0.80  {As the critical value of t at 16 degree

                                         of freedom are -1.337 & 1.337 with P = 10%}  

P(-1.337 < \frac{(\bar X_1-\bar X_2)-(\mu_1-\mu_2)}{s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } < 1.337) = 0.80

P( -1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } < {(\bar X_1-\bar X_2)-(\mu_1-\mu_2)} < 1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } ) = 0.80

P( (\bar X_1-\bar X_2)-1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } < (\mu_1-\mu_2) < (\bar X_1-\bar X_2)+1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } ) = 0.80

<u>80% confidence interval for</u> (\mu_1-\mu_2) =

[ (\bar X_1-\bar X_2)-1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } , (\bar X_1-\bar X_2)+1.337 \times {s_p\sqrt{\frac{1}{n_1} +\frac{1}{n_2} } } ]

= [ (81.70-74.60)-1.337 \times {25.11 \times \sqrt{\frac{1}{7} +\frac{1}{11} } } , (81.70-74.60)+1.337 \times {25.11 \times \sqrt{\frac{1}{7} +\frac{1}{11} } } ]

= [-9.132 , 23.332]

Therefore, 80% confidence interval for the true mean difference between the mean amount of mail-order purchases and the mean amount of internet purchases (\mu_1-\mu_2) is [-9.132 , 23.332].

4 0
3 years ago
ASAP PLEASE HELP MEEEEE
VikaD [51]

Answer:

85 flu patients Per week so A

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What multiples to -48 and adds to 2
gogolik [260]
8 x -6 = -48  
8 -6 = 2
5 0
3 years ago
M/3-4&lt;-1 <br> answer this question<br> please show your work
Len [333]

Answer:

m<9

Step-by-step explanation:

m/3 - 4 < -1

        +4  +4

______________

m/3<3

 × 3 ×3

__________

m<9

Hope this Helps!

3 0
3 years ago
Read 2 more answers
Other questions:
  • What is a Reciprical??
    9·2 answers
  • Can you plsss help you will get 22 points!
    5·1 answer
  • What expression can you write to describe the overall change in temperature?Do not included the temperature at the beginning of
    12·1 answer
  • In 20 words or fewer, how many solutions does x^2 -36=0 have?What values of x make the equation true?
    5·1 answer
  • Use properties to find the sum or product.<br><br> 5 x 23 x 2
    7·1 answer
  • Jill is using a map of her town to determine how far the park is from school. The map does not have a scale, but Jill knows her
    14·2 answers
  • keisha bought a suit on sale for $496. This price was 36% less then the original price. What was the original price?
    14·1 answer
  • Check the Screenshot
    9·2 answers
  • Enter the number 86.3865 rounded to the nearest hundredth (two decimal places)
    14·2 answers
  • Guys please help me i need pictures
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!