Solution verification on a difference of proportions exercise
up vote
0
down vote
favorite
A company prints stickers and sells them in packs of $100$ units, ensuring that on average $30$% of the stickers are type $A$, $60$% are type $B$ and $10$% are type $C$. If a package selected at random contains $50$ stickers of type $A$, $45$ of type $B$ and $5$ of type $C$, do these proportions match those given by the company at the level $alpha = 0.005$?
I've tryed used the Goodnes of Fit with this table:
$begin{array}{|c|c|c|c|}
hline
type& OBSERVED & EXPECTED \ hline
A&50 & 30\ hline
B& 45 & 60\ hline
C& 5 &10 \ hline
end{array}$
$tilde{chi}^2=19.583$
My $p$-value is $0.000056$ then the proportions don't match.
I formulated the solution to the exercise well?
statistics proof-verification
asked Nov 26 at 5:45
testpilot
585214
add a comment |
up vote
0
down vote
favorite
A company prints stickers and sells them in packs of $100$ units, ensuring that on average $30$% of the stickers are type $A$, $60$% are type $B$ and $10$% are type $C$. If a package selected at random contains $50$ stickers of type $A$, $45$ of type $B$ and $5$ of type $C$, do these proportions match those given by the company at the level $alpha = 0.005$?
I've tryed used the Goodnes of Fit with this table:
$begin{array}{|c|c|c|c|}
hline
type& OBSERVED & EXPECTED \ hline
A&50 & 30\ hline
B& 45 & 60\ hline
C& 5 &10 \ hline
end{array}$
$tilde{chi}^2=19.583$
My $p$-value is $0.000056$ then the proportions don't match.
I formulated the solution to the exercise well?
statistics proof-verification
asked Nov 26 at 5:45
testpilot
585214
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
A company prints stickers and sells them in packs of $100$ units, ensuring that on average $30$% of the stickers are type $A$, $60$% are type $B$ and $10$% are type $C$. If a package selected at random contains $50$ stickers of type $A$, $45$ of type $B$ and $5$ of type $C$, do these proportions match those given by the company at the level $alpha = 0.005$?
I've tryed used the Goodnes of Fit with this table:
$begin{array}{|c|c|c|c|}
hline
type& OBSERVED & EXPECTED \ hline
A&50 & 30\ hline
B& 45 & 60\ hline
C& 5 &10 \ hline
end{array}$
$tilde{chi}^2=19.583$
My $p$-value is $0.000056$ then the proportions don't match.
I formulated the solution to the exercise well?
statistics proof-verification
asked Nov 26 at 5:45
testpilot
585214
A company prints stickers and sells them in packs of $100$ units, ensuring that on average $30$% of the stickers are type $A$, $60$% are type $B$ and $10$% are type $C$. If a package selected at random contains $50$ stickers of type $A$, $45$ of type $B$ and $5$ of type $C$, do these proportions match those given by the company at the level $alpha = 0.005$?
I've tryed used the Goodnes of Fit with this table:
$begin{array}{|c|c|c|c|}
hline
type& OBSERVED & EXPECTED \ hline
A&50 & 30\ hline
B& 45 & 60\ hline
C& 5 &10 \ hline
end{array}$
$tilde{chi}^2=19.583$
My $p$-value is $0.000056$ then the proportions don't match.
I formulated the solution to the exercise well?
statistics proof-verification
statistics proof-verification
asked Nov 26 at 5:45
testpilot
585214
asked Nov 26 at 5:45
testpilot
585214
asked Nov 26 at 5:45
testpilot
585214
asked Nov 26 at 5:45
testpilot
585214
asked Nov 26 at 5:45
testpilot
585214
585214
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58
add a comment |
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58
add a comment |
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["$", "$"], ["\\(","\\)"]]);
});
});
}, "mathjax-editing");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "69"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
noCode: true, onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3013898%2fsolution-verification-on-a-difference-of-proportions-exercise%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
active
oldest
votes
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Mathematics Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fmath.stackexchange.com%2fquestions%2f3013898%2fsolution-verification-on-a-difference-of-proportions-exercise%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
This is exactly how you do it (assuming you computed the summ correctly).
– Sean Roberson
Nov 26 at 5:58