# Answer in Statistics and Probability for napie #250967

In a survey taken 10 years ago, it was found that 10% of customers of a supermarket brought along their own shopping bags. A recent survey aimed to prove that the current percentage of customers bringing along their own shopping bags is different from 10%. In the survey, it was found that 92 of the 1 000 customers surveyed brought along their own shopping bags. We want to test the claim that the current percentage is not 10%, at the 5% significance level

(a) State the appropriate null and alternative hypothesis.

(b) State and calculate the appropriate test statistic.

(c) Determine the critical value of the test or the p–value of the test.

(d) State whether or not you reject the null hypothesis, giving the reason.

(e) Draw an appropriate conclusion

To answer the question we should test hypothesis about the probability of the event

We got the relative frequency “w = {frac {92} {100}}”, and want to test if it’s significantly different from “p{scriptscriptstyle 0} = 0.1”

Null hypothesis: p = 0.1

Alternative hypothesis: “p not =0.1”

Since we want to test the claim that current percenatge is not 10%, then if we reject the null hypothesis it will mean that this claim is correct

The test statistic: “U={frac {(w-p{scriptscriptstyle 0})sqrt{n}} {sqrt{p{scriptscriptstyle 0}*(1-p{scriptscriptstyle 0})}}}”

In our case: “U={frac {(0.092-0.1)sqrt{1000}} {sqrt{0.1*0.9}}}= -0.84”

Due to the form of the alternative hypothesis, two-tailed test is required

The critical interval is “(-infty;-u{scriptscriptstyle 0}) u222a(u{scriptscriptstyle 0};+infty)”, where “P(N(0,1)>u{scriptscriptstyle 0}) = {frac alpha 2} = 0.025to u{scriptscriptstyle 0} = 1.96”

So, the critical interval is “(-infty;-1.96) u222a(1.96;+infty)”

Our U-value does not belong to the critical interval, so we fail to reject the null hypothesis, which means there are no statistically significant evidence that current percentage is different from 10%

Calculate the price
Pages (550 words)
\$0.00
*Price with a welcome 15% discount applied.
Pro tip: If you want to save more money and pay the lowest price, you need to set a more extended deadline.
We know how difficult it is to be a student these days. That's why our prices are one of the most affordable on the market, and there are no hidden fees.

Instead, we offer bonuses, discounts, and free services to make your experience outstanding.
How it works
Receive a 100% original paper that will pass Turnitin from a top essay writing service
step 1
Fill out the order form and provide paper details. You can even attach screenshots or add additional instructions later. If something is not clear or missing, the writer will contact you for clarification.
Pro service tips
How to get the most out of your experience with TheBestPaperWriters
One writer throughout the entire course
If you like the writer, you can hire them again. Just copy & paste their ID on the order form ("Preferred Writer's ID" field). This way, your vocabulary will be uniform, and the writer will be aware of your needs.
The same paper from different writers
You can order essay or any other work from two different writers to choose the best one or give another version to a friend. This can be done through the add-on "Same paper from another writer."
Copy of sources used by the writer
Our college essay writers work with ScienceDirect and other databases. They can send you articles or materials used in PDF or through screenshots. Just tick the "Copy of sources" field on the order form.
Testimonials
See why 20k+ students have chosen us as their sole writing assistance provider
Check out the latest reviews and opinions submitted by real customers worldwide and make an informed decision.
Thank you!
Customer 452451, November 27th, 2022
Architecture, Building and Planning
The assignment was well written and the paper was delivered on time. I really enjoyed your services.
Customer 452441, September 23rd, 2022
English 101
Very good job. I actually got an A
Customer 452443, September 25th, 2022
Psychology
Thanks a lot the paper was excellent
Customer 452453, October 26th, 2022
Excellent timely work
Customer 452451, April 19th, 2023
Theology
Job well done and completed in a timely fashioned!
Customer 452451, November 18th, 2022
Excellent service - thank you!
Customer 452469, February 20th, 2023
Anthropology
Excellent services will definitely come back
Customer 452441, September 23rd, 2022
Job well done. Finish paper faster than expected. Thank you!
Customer 452451, October 3rd, 2022
Anthropology
excellent loved the services
Customer 452443, September 23rd, 2022
Nursing
The paper was EXCELLENT. Thank you
Customer 452449, September 23rd, 2022
11,595
Customer reviews in total
96%
Current satisfaction rate
3 pages
Average paper length
37%
Customers referred by a friend