Answer:
$31.37 is the sale price
Step-by-step explanation:
All you need to do to find the discount price (sale price) is multiply the price of the item by the decimal form of the percentage.
1. Store A. 40% off the original price of $159.99
63.996 is the discount price we are looking for
2. Store B. 25% off the original price of $130.50
32.625 is the discount price we are looking for
3. Now to find their difference you just subtract the two values.
The discount price (sale price) is $31.371
Let be the population mean.
For the given claim , we have
Null hypothesis :
Alternative hypothesis :
Since alternative hypothesis is two-tailed , so the test is a two-tailed test.
Given : Sample size : n=220 ;
Sample mean: ;
Standard deviation:
Test statistic for population mean:
By using the standard normal distribution table of z , we have
P-value ( two tailed test ) :
Since , the P-value is greater than the significance level of , it means we do not have sufficient evidence to reject the null hypothesis.