Mathematics, 21.04.2020 17:59 danizara8

A survey by American Express Spending reported that the average amount spent on a wedding gift for a close family member is $166. A random sample of 45 people who purchased wedding gifts for a close family member spent an average of $160.50. Assume that the population standard deviation is $38. Use a 95% confidence interval to test the validity of this report and choose the one statement that is correct.

a. Because this confidence interval does include $166, the report by American Express Spending is not validated.
b. Because this confidence interval does include $166, the report by American Express Spending is validated.
c. Because this confidence interval does not include $166, the report by American Express Spending is not validated.
d. Because this confidence interval does not include $166, the report by American Express Spending is validated.

Answers: 3

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 19:10, madimocaj

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Answers: 2

continue

Mathematics, 21.06.2019 19:40, NobleWho

Neoli is a nurse who works each day from 8: 00 am to 4: 00 pm at the blood collection centre. she takes 45 minutes for her lunch break. on average, it takes neoli 15 minutes to collect each sample and record the patient's details. on average, how many patients can neoli see each day?

Answers: 3

continue

Mathematics, 21.06.2019 21:30, muncyemily

Which of the following shows the length of the third side, in inches, of the triangle below

Answers: 2

continue

Mathematics, 22.06.2019 02:00, danielmartinez024m

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?

Answers: 2

continue

You know the right answer?

A survey by American Express Spending reported that the average amount spent on a wedding gift for a...