One attorney claims that more than 25% of all the lawyers in boston advertise for their business. a sample of 200 lawyers in boston showed that 63 of the lawyers had used some form of advertising for their business. at =0.05, is there enough evidence to support the attorney’s claim? (use the p-value method to test this hypothesis)

There is  enough evidence to support the attorney’s claim

Step-by-step explanation:

Given that one  attorney claims that more than 25% of all the lawyers in Boston advertise for their business.

Sample size n =200

Sample proportion =

Hypotheses:

(right tailed testat 5% significance level)

Assuming H0 to be true, std error of p =

Test statistic z = p diff/std error

=

p value for one tailed =0.0170

Since p <0.05 we reject null hypothesis

There is  enough evidence to support the attorney’s claim

d. $180

step-by-step explanation:

if the dimensions of the room is 9ft by 12 ft, we have the area of the floor as,

so the area of the floor is 108 square feet, converting that into square yards we get,

the cost of carpet is $15 per square yard, therefore the cost of carpet for 12 square yards is,

hence, the cost of carpet is $180.

assuming the dimensions of the room be,

15 ft by 12 ft

so, the area of the floor of that room is,

we can convert 180 square feet into square yards, we know that,

1 sq ft = 0.111 sq yard

so, 180 square feet is,

so the area of floor is 20 square yards.

now, the cost of carpet is 15 dollars per square yard, therefore the cost of carpet for 20 square yards is,

so, it will cost $300.

the answer is b