Question

QUESTION 21

1. Joe would like to estimate the average temperature for a certain month (30 days). He randomly selects 15 days and records the following data:

   52 55 59 60 62 62 64 65 70 73 74 74 74 78 85

   Which of the numbers below represent his point estimate?

   	A.	67.1
   	B.	33.6
   	C.	65.0
   	D.	74.0

   QUESTION 22

2. Suppose your sample mean is $238 and your sample standard deviation is $24. If your sample size is 30, find the margin of error using 95% confidence.

   	A.	$8.59
   	B.	$4.38
   	C.	$85.90
   	D.	$15.68

   QUESTION 23

3. Suppose you do a project on the average number of states students have visted. You get data from 35 students and find a sample mean of 8.4 states with a sample standard deviation of 5.9 states. Find the margin of error using 90% confidence.

   	A.	1.6 states
   	B.	1.0 states
   	C.	3,2 states
   	D.	2,3 states

   QUESTION 24

4. A realtor wants to estimate the average number of days a house is on the market in her town. Based on data from the last 40 transactions in her town, she finds a sample mean of 79 days with a standard deviation of 38 days. What is the margin of error for her data, using 99% confidence?

   		15.5 days
   		16.7 days
   		32.2 days
   		6.0 days

Answer 1