BASIC PRACTICE OF STATS-LL W/SAPLINGPLU
8th Edition
ISBN: 9781319216245
Author: Moore
Publisher: MAC HIGHER
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Chapter 20, Problem 20.41E
To determine
To construct: The stemplot and explain that the t interval cannot be safely used for the given data.
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For each of the time series, construct a line chart of the data and identify the characteristics of the time series (that is, random, stationary, trend, seasonal, or cyclical).
Year Month Units1 Nov 42,1611 Dec 44,1862 Jan 42,2272 Feb 45,4222 Mar 54,0752 Apr 50,9262 May 53,5722 Jun 54,9202 Jul 54,4492 Aug 56,0792 Sep 52,1772 Oct 50,0872 Nov 48,5132 Dec 49,2783 Jan 48,1343 Feb 54,8873 Mar 61,0643 Apr 53,3503 May 59,4673 Jun 59,3703 Jul 55,0883 Aug 59,3493 Sep 54,4723 Oct 53,164
High Cholesterol: A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results:
Individual Before
1
2
3
4
5
6
7
8
237
282
278
297
243
228
298
269
After
200
208
178
212
174
201
189
185
Part: 0/2
Part 1 of 2
(a) Construct a 99.9% confidence interval for the mean reduction in cholesterol level. Let a represent the cholesterol level before treatment minus the cholesterol level after. Use tables to find the critical value and round the answers to at least one decimal place.
I worked out the answers for most of this, and provided the answers in the tables that follow. But for the total cost table, I need help working out the values for 10%, 11%, and 12%.
A pharmaceutical company produces the drug NasaMist from four chemicals. Today, the company must produce 1000 pounds of the drug. The three active ingredients in NasaMist are A, B, and C. By weight, at least 8% of NasaMist must consist of A, at least 4% of B, and at least 2% of C. The cost per pound of each chemical and the amount of each active ingredient in one pound of each chemical are given in the data at the bottom. It is necessary that at least 100 pounds of chemical 2 and at least 450 pounds of chemical 3 be used.
a. Determine the cheapest way of producing today’s batch of NasaMist. If needed, round your answers to one decimal digit.
Production plan
Weight (lbs)
Chemical 1
257.1
Chemical 2
100
Chemical 3
450
Chemical 4
192.9
b. Use SolverTable to see how much the percentage of…
Chapter 20 Solutions
BASIC PRACTICE OF STATS-LL W/SAPLINGPLU
Ch. 20.1 - Prob. 1AYKCh. 20.1 - Prob. 2AYKCh. 20.2 - Prob. 3AYKCh. 20.2 - Prob. 4AYKCh. 20.3 - Prob. 5AYKCh. 20.3 - Prob. 6AYKCh. 20.3 - Prob. 7AYKCh. 20.4 - Prob. 8AYKCh. 20.4 - Prob. 9AYKCh. 20.4 - Prob. 10AYK
Ch. 20.6 - Prob. 11AYKCh. 20.6 - Prob. 12AYKCh. 20.7 - Prob. 13AYKCh. 20.7 - Prob. 14AYKCh. 20 - Prob. 20.15CYSCh. 20 - Prob. 20.16CYSCh. 20 - Prob. 20.17CYSCh. 20 - Prob. 20.18CYSCh. 20 - Prob. 20.19CYSCh. 20 - Prob. 20.20CYSCh. 20 - Prob. 20.21CYSCh. 20 - Prob. 20.22CYSCh. 20 - Prob. 20.23CYSCh. 20 - Prob. 20.24CYSCh. 20 - Prob. 20.25ECh. 20 - Prob. 20.26ECh. 20 - Prob. 20.27ECh. 20 - Prob. 20.28ECh. 20 - Prob. 20.29ECh. 20 - Prob. 20.30ECh. 20 - Prob. 20.31ECh. 20 - Prob. 20.32ECh. 20 - Prob. 20.33ECh. 20 - Prob. 20.34ECh. 20 - Prob. 20.35ECh. 20 - Prob. 20.36ECh. 20 - Prob. 20.37ECh. 20 - Prob. 20.38ECh. 20 - Prob. 20.39ECh. 20 - Prob. 20.40ECh. 20 - Prob. 20.41ECh. 20 - Prob. 20.42ECh. 20 - Prob. 20.43ECh. 20 - Prob. 20.44ECh. 20 - Prob. 20.45ECh. 20 - Prob. 20.46ECh. 20 - Prob. 20.47ECh. 20 - Prob. 20.48ECh. 20 - Prob. 20.49ECh. 20 - Prob. 20.50ECh. 20 - Prob. 20.51ECh. 20 - Prob. 20.52E
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