A study sampled 350 upperclassmen (Group 1) and 250 underclassmen (Group 2) at high schools around the city of Houston. The study was performed at the end of the school year and asked each if they had used steroids at any point in the last school year. Of the upperclassmen, 25 claimed to have used steroids in the last school year, and of the underclassmen, 19 claimed to have used steroids. Run a 95% confidence interval to test for a significant difference in the proportions of students who used steroids.

Do not reject  

Step-by-step explanation:

From the question we are told that

Sample size

Sample size

Sample proportion 1  

Sample proportion 2

95% confidence interval

Generally for 95% confidence level

Level of significance

Therefore

Generally the equation for confidence interval between  is mathematically given as

Therefore

Confidence interval is

Conclusion

Given the confidence interval has zero

Therefore do not reject  

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5

m∠a is 90°

m∠b is 40°