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trapecia [35]
3 years ago
11

g An article reported the results of a survey of 400 elementary school teachers and 500 high school teachers. Of the elementary

school teachers, 100 said they were very satisfied with their jobs, whereas 200 of the high school teachers were very satisfied with their work. We wish to do hypothesis testing to check that true proportion of elementary school teachers and high school teachers who were very satisfied with their jobs differs from each other. Write the formula and calculate the value of the estimate of the standard error of the sample statistics, you would use in finding test statistic, assuming null hypothesis is true. ( Round your answer to 3 decimal places)
Mathematics
1 answer:
daser333 [38]3 years ago
4 0

Answer:2020

Step-by-step explanation:horrible year just grinding points btw

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a fraction has a denominator that is 4 greater than its numerator. it is equivalent to 9/15. what is the fraction?
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7 0
3 years ago
Chrissy currently has a credit card that charges 15% interest. She usually carries a balance of about $500. What will her total
Evgesh-ka [11]

Answer:

$900

Step-by-step explanation:

If she holds $500 and she is charged 15%; it means

The interest she pays per month is ;

$500 × 15/100 = $75

Then annually meaning for 12 months, she pays;

$75 × 12 = $900

6 0
3 years ago
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I will give you brainlest plzzz helppp!!!!
Morgarella [4.7K]

Answer:

329/9, the answer seems wrong but I triple checked because I thought so too. The answer is 100% correct

Step-by-step explanation:

Angle EFG + Angle FGH + Angle GEF = 180 degrees

(2x+1) + (6x+2) + (x + 19) = 180 degrees

9x + 22 = 180 degrees

9x = 158 degrees

x= 158/9

x+19 = Angle GEF

158/9 + 19 = Angle GEF

329/9 =Angle GEF

Double check:

(2x+1) + (6x+2) + (x + 19), x=158/9

2(158/9) + 1 = 325/9

6(158/9) +2 = 322/3

(158/9) +19 = 329/9

325/9 + 322/3 + 329/9 = 180

3 0
3 years ago
7/8, 3/10 whats the common denominator
Ivahew [28]
The common denominator is 40.

3 0
3 years ago
Read 2 more answers
#20
yKpoI14uk [10]

0.48 miles

Step-by-step explanation:

Step 1

It is given that the grade(slope) is 4%. This means that for every 100 miles traveled, the elevation changes by 4 miles.

Step 2

Hence for a distance of 12 miles , the elevation changes by 12*4/100 = 48/100 = 0.48 miles. [Using direct proportion]

6 0
3 years ago
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