Question

a pencil manufacture produce panciling having mean writing life of 300 pages with a standard deviation of 20 pages a random sample of 49 pencil found the mean writing span to be 290 pages test the claim of manufacture at 5% level of significance give the solution​

Answer 1

Step-by-step explanation:

for those who want to sh ow❤❤❤ zws-dztc-whk ❤❤