The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1422 1220 981 695 720 834 Assume the population is normally distributed. 727 741 546 620 1447 945 (a) Find the sample mean. (Round to one decimal place as needed.) (b) Find the sample standard deviation. (Round to one decimal place as needed.) (c) Construct a 99% confidence interval for the population mean u. A 99% confidence interval for the population mean is ( ). (Round to one decimal place as needed.)

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Question
100%
The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1422
1220
981
695
720
834
Assume the population is normally distributed.
727
741
546
620
1447
945
(a) Find the sample mean.
X=
(Round to one decimal place as needed.)
(b) Find the sample standard deviation.
(Round to one decimal place as needed.)
(c) Construct a 99% confidence interval for the population mean µ.
A 99% confidence interval for the population mean is ( ).
(Round to one decimal place as needed.)
Transcribed Image Text:The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1422 1220 981 695 720 834 Assume the population is normally distributed. 727 741 546 620 1447 945 (a) Find the sample mean. X= (Round to one decimal place as needed.) (b) Find the sample standard deviation. (Round to one decimal place as needed.) (c) Construct a 99% confidence interval for the population mean µ. A 99% confidence interval for the population mean is ( ). (Round to one decimal place as needed.)
The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a
98% confidence interval for the population mean.
100,630 80,545
77,588 67,580
51,520
68,054 94,568 65,858 D
78,706
74,457
44,811
86,308
60,741
58,228 55,041 78,429
47,536
98,550
80,989
93,359
63,335
75,060 50,988 61,088
92,075
84,277
80,472 64,383
74,259
56,802 47,149 89,541
75,955
61,376
83,024
.....
(a) Find the sample mean.
x = (Type an integer or decimal rounded to two decimal places as needed.)
(b) Find the sample standard deviation.
S=
(Type an integer or decimal rounded to two decimal places as needed.)
(c) Construct a 98% confidence interval for the population mean.
(Round to the nearest integer as needed.)
Transcribed Image Text:The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a 98% confidence interval for the population mean. 100,630 80,545 77,588 67,580 51,520 68,054 94,568 65,858 D 78,706 74,457 44,811 86,308 60,741 58,228 55,041 78,429 47,536 98,550 80,989 93,359 63,335 75,060 50,988 61,088 92,075 84,277 80,472 64,383 74,259 56,802 47,149 89,541 75,955 61,376 83,024 ..... (a) Find the sample mean. x = (Type an integer or decimal rounded to two decimal places as needed.) (b) Find the sample standard deviation. S= (Type an integer or decimal rounded to two decimal places as needed.) (c) Construct a 98% confidence interval for the population mean. (Round to the nearest integer as needed.)
Expert Solution
steps

Step by step

Solved in 4 steps with 3 images

Blurred answer
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman