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
Nataly [62]
3 years ago
7

A survey of 1 comma 558 randomly selected adults showed that 522 of them have heard of a new electronic reader. The accompanying

technology display results from a test of the claim that 38​% of adults have heard of the new electronic reader. Use the normal distribution as an approximation to the binomial​ distribution, and assume a 0.01 significance level to complete parts​ (a) through​ (e). Is the test two-tailed, left-tailed, or right-tailed? Left-tailed test Two-tailed test Right tailed test What is the test statistic? (Round to two décimal places as needed.) What is the P-vahie?
Mathematics
1 answer:
sineoko [7]3 years ago
6 0

Answer with explanation:

Let  p be the proportion of adults have heard of the new electronic reader.

Given claim : The accompanying technology display results from a test of the claim that 38​% of adults have heard of the new electronic reader.

i.e. p=0.38

Then , the set of hypothesis will be :-

H_0: p=0.38\\\\H_a:p\neq0.38

Since, the alternative hypothesis is two tailed , so the test is two-tailed test.

Also, it is given that the sample size : n=1558

Number of adults showed that they have heard of a new electronic reader=522

So the sample proportion for adults have heard of the new electronic reader : \hat{p}=\dfrac{522}{1558}\approx0.34



The test statistic for proportion is given by :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\\\\Rightarrow\ z=\dfrac{0.34-0.38}{\sqrt{\dfrac{0.38(1-0.38)}{1558}}}\\\\\\\Rightarrow\ z=-3.25279036541\approx-3.25

By using standard normal distribution table , the P-value for two tailed test corresponds to the obtained z-value ==0.0011541

You might be interested in
I am having a hard time simplifying (x^2 - 4x + 8)(2x - 1), can you help me out?
Brums [2.3K]

2x^3+7x^2+12x-8 is the answer

4 0
3 years ago
Help?? PLSSSS NOWWWWW
Vesnalui [34]
Using the equation y=9x you can substitute x for the hours. Y=9 times 5 and y=9 times 8. Y=45 and y=72. The range is $45-$72
7 0
3 years ago
Suppose Đ1 and Đ2 are known to be complementary. If mÐ1 = 20, then mÐ2 =
juin [17]

Answer:

70

Step-by-step explanation:

complementary angles are 2 angles that add up to 90, the first angle is already 20 so just subtract 90-20 to find other angle

6 0
3 years ago
Please answer thanks
nirvana33 [79]

Answer:

10

Step-by-step explanation:

it's kinda hard to explain

3 0
2 years ago
What is the equation of the line that passes through the point (-2,0) and has a slope of -2?​
prohojiy [21]

Answer:

so the equation is y=-2x-4

Step-by-step explanation:

sub the points in the equation to find the y-intercept

y=x(-2)+b

0=-2(-2)+b

0=4+b

0-4=b

-4=b

6 0
3 years ago
Other questions:
  • Laura  earns $ 255 by working 20 hours each week .
    9·1 answer
  • When you sign up for a movie service, you get three free months of movies. Then you are charged $15 per month to rent movies. If
    5·2 answers
  • A jewelry store is selling a set of 4 pairs of gemstone earrings for $58, including tax. Neva and three of her friends want to b
    13·1 answer
  • An alloy weighing 40 lbs. is 10% tin. The alloy was made by mixing a 15% tin alloy and a 8% tin alloy. How many pounds of each a
    7·2 answers
  • 3 less than the quotient of 18 and a number m
    14·1 answer
  • Across how many lines of reflection can you reflection can you reflect a square onto itself
    12·1 answer
  • Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
    10·1 answer
  • Or which color is the difference between the theoretical probability and experimental probability greatest? Use the drop-down me
    13·1 answer
  • I earned $92 for cutting yards. I gave my brother 20% of my money for helping me. How much money did I give my brother?
    15·1 answer
  • PLEASE HELP I'M BEING TIMES!! (UNIT RATE!!!!!)
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!