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
Hitman42 [59]
2 years ago
6

Help me please, NO links​11th grade work

Mathematics
1 answer:
weqwewe [10]2 years ago
6 0

I have attached a photo of my answer and working. You were nearly there, you just had swapped opposite and adjacent by accident. Hope this helps!

You might be interested in
A company surveyed 2400 men where 1248 of the men identified themselves as the primary grocery shopper in their household. ​a) E
polet [3.4K]

Answer:

a) With a confidence level of 98%, the percentage of all males who identify themselves as the primary grocery shopper are between 0.4962 and 0.5438.

b) The lower limit of the confidence interval is higher that 0.43, so if he conduct a hypothesis test, he will find that the data shows evidence to said that the fraction is higher than 43%.

c) \alpha =1-0.98=0.02

Step-by-step explanation:

If np' and n(1-p') are higher than 5, a confidence interval for the proportion is calculated as:

p'-z_{\alpha/2}\sqrt{\frac{p'(1-p')}{n} }\leq  p\leq p'+z_{\alpha/2}\sqrt{\frac{p'(1-p')}{n} }

Where p' is the proportion of the sample, n is the size of the sample, p is the proportion of the population and z_{\alpha/2} is the z-value that let a probability of \alpha/2 on the right tail.

Then, a 98% confidence interval for the percentage of all males who identify themselves as the primary grocery shopper can be calculated replacing p' by 0.52, n by 2400, \alpha by 0.02 and z_{\alpha/2} by 2.33

Where p' and \alpha are calculated as:

p' = \frac{1248}{2400}=0.52\\\alpha =1-0.98=0.02

So, replacing the values we get:

0.52-2.33\sqrt{\frac{0.52(1-0.52)}{2400} }\leq  p\leq 0.52+2.33\sqrt{\frac{0.52(1-0.52)}{2400} }\\0.52-0.0238\leq p\leq 0.52+0.0238\\0.4962\leq p\leq 0.5438

With a confidence level of 98%, the percentage of all males who identify themselves as the primary grocery shopper are between 0.4962 and 0.5438.

The lower limit of the confidence interval is higher that 0.43, so if he conduct a hypothesis test, he will find that the data shows evidence to said that the fraction is higher than 43%.

Finally, the level of significance is the probability to reject the null hypothesis given that the null hypothesis is true. It is also the complement of the level of confidence. So, if we create a 98% confidence interval, the level of confidence 1-\alpha is equal to 98%

It means the the level of significance \alpha is:

\alpha =1-0.98=0.02

4 0
3 years ago
A store buys 17 sweaters for $255 and sells them for $578. How much profit 1 point
ddd [48]
The answer is 243 is the answer to this question
4 0
3 years ago
What is the value of x in the equation 2x+7=1
iogann1982 [59]
2x + 7 = 1

Subtract 7 on both sides

2x = 1 - 7

2x = -6

Divide both sides by 2

x = -6/2

x = -3

Your answer is \boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\bf{x=-3}}}}}}}}}}}}}}}}}}}

8 0
3 years ago
Read 2 more answers
Im. lost plese help I suck at Unit Rates
Makovka662 [10]
Luke: 2 miles in 40 minutes, 20 minutes a mile, (2/40 = 20 minutes a mile)
Luke's speed is 3 miles an hour (60minutes/20minutes a mile = 3miles).

Sally: 0.05 miles a minute, 60 minutes in an hour, 60 x 0.05 = 3 miles an hour.  Or 0.05 miles a minute, 40 minutes walked, 40 x 0.05 = 2 miles walked.

There are a few other ways to show that they are accurate rates. 

So yes, they are both correct rates.
7 0
3 years ago
Please help me. Thank you
lina2011 [118]

     Step-by-step explanation

i had to turn  my laptop just to read that

                 My

5 0
3 years ago
Other questions:
  • ______To test the efficacy of vitamin C in preventing colds, army recruits are randomly assigned to one of two groups: one in wh
    15·2 answers
  • Let f(x) = -2x + 7 and g(x) = -6x + 3. Find (f o g) and state its domain.
    13·1 answer
  • In triangle PQR, angle P is congruent to angle R and the measure of angle Q is twice the measure of angle R. Find the measure of
    7·2 answers
  • How do I find what percentage 8250 is out of 9072?
    9·2 answers
  • LOOK AT PICTURE ↓↓↓↓↓↓↓↓↓↓↓
    12·1 answer
  • Determine if the equation y = 2/5 x − 4 y=25x-4 represents a proportional relationship. If so, determine the constant of proport
    5·1 answer
  • Gymnast Clothing manufactures expensive hockey jerseys for sale to college bookstores in runs of up to 300. Its cost (in dollars
    10·1 answer
  • A 123​-inch pipe is cut into two pieces. One piece is two times the length of the other. Find the length of the shorter piece.
    8·1 answer
  • (-3).(+9)-(-24)-(+6).(+2)
    12·1 answer
  • What is the area of the shaded region
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!