Math Normal Distribution and Confidence Interval

Statistics Math 1342 Final Exam Review Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Provide an appropriate response. 1) A card is drawn from a standard deck of 52 playing cards. Find the probability that the card is an ace or a heart. 17 7 3 4 A) B) C) D) 52 52 13 13 Answer: D 2) The events A and B are mutually exclusive. If P(A) = 0.7 and P(B) = 0.2, what is P(A or B)? A) 0.5 B) 0.9 C) 0.14 D) 0 Answer: B 3) A coin is tossed. Find the probability that the result is heads. A) 1 B) 0.5 C) 0.1 Answer: B 4) Suppose you are using = 0.01 to test the claim that  µ = 950 using a P-value. You are given the 1) 2) D) 0.9 3) 4)†¦show more content†¦Round your answer to three decimal places. A) -2.617 B) -3.010 C) -3.186 Answer: D 17) Find the area of the indicated region under the standard normal curve. 17) = 0.05 if 15) 16) D) -2.189 A) 0.0968 Answer: C B) 0.0823 C) 0.9032 D) 0.9177 18) A sample of candies have weights that vary from 2.35 grams to 4.75 grams. Use this information to find the upper and lower limits of the first class if you wish to construct a frequency distribution with 12 classes. A) 2.35-2.65 Answer: B 19) Assume that the heights of men are normally distributed. A random sample of 16 men have a mean height of 67.5 inches and a standard deviation of 1.4 inches. Construct a 99% confidence interval for the population standard deviation, . A) (0.8, 2.1) B) (1.0, 2.6) C) (0.9, 2.5) D) (1.0, 2.4) Answer: C B) 2.35-2.55 C) 2.35-2.54 D) 2.35-2.75 18) 19) 3 20) In a survey of 2480 golfers, 15% said they were left-handed. The survey s margin of error was 3%. Construct a confidence interval for the proportion of left-handed golfers. A) (0.12, 0.15) B) (0.12, 0.18) C) (0.11, 0.19) D) (0.18, 0.21) Answer: B 21) For the stem-and-leaf plot below, what is the maximum and what is the minimum entry? Key : 11 7 = 11.7 11 3 7 12 4 6 6 7 8 9 13 0 1 1 2 3 6 6 7 8 8 14 3 4 6 6 8 9 9 9 15 0 1 1 2 3 7 7 8 9 16 2 2 5 7 8 8 9 9 17 1 7 A) max: 177; min: 113 C) max: 17.7; min: 11.7 20) 21) B) max: 17.7; min: 11.3 D) max: 17.1; min: 11.3Show MoreRelatedNormal Distribution and Random Sample1379 Words   |  6 PagesMath 156–Sat: HW #4 Name: 1. What is the difference between [pic] and[pic]? Between s and[pic]? (10 points) 2. Explain the difference between [pic] and [pic] and between [pic] and[pic]? (10 points) 3. Suppose that a random sample of size 64 is to be selected from a population having [pic] and standard deviation 5. (a) What are the mean and standard deviation of the [pic] sampling distribution? Can we say that the shape of the distribution is approximatelyRead MoreCryptography1082 Words   |  5 PagesNumber: MATH 156 – Introduction to Statistics Semester: Summer 2014 Office Location: TBA E-Mail Address: jamie_bradley@portal.ocean.edu Office Hours: By appointment Catalog Description: An introductory level course for non-mathematics majors who need or desire a working knowledge of statistics. This course is oriented towards all fields in which statistics finds applications. Topics include: summarizing data, probability, normal and binomial distributions, hypothesisRead MoreThe Fundamental Concepts Of Statistics1309 Words   |  6 Pagesevidence and protecting against any unwarranted conclusion assumptions. When there is uncertainty about the population parameter, confidence intervals are used to give an estimate of the range of values. Usually, confidence levels are set at 0.90, 0.95 and 0.99. A lower and upper number are chosen from the sample size and the standard deviation. If the confidence interval is set at 0.95, we are suggesting the probability of spotting a value is less than 0.05. Consequently, if the same population wereRead MoreNormal Distribution and Pic2019 Words   |  9 Pagesand standard deviation of the data. C. Describe the distribution of the data, citing both the plots and the summary statistics found in questions 1 and 2. AP Statistics Exam Review Topic II: Normal Distribution [pic] [pic] [pic] [pic] [pic] [pic] [pic] [pic] [pic] FREE RESPONSE A set of 2,000 measurements had a symmetric, mound-shaped distribution. The mean is 5.3 and the standard deviation is 0.7. Determine an interval that contains approximately 1,360 date values. 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A business wants to estimate the true mean annual income of its customers.   It randomly samples 220 of its customers.   The mean annual income was $61,400 with a standard deviation of $2,200.   Find a 95% confidence interval for the true meanRead MoreEssay on Math 533 Final Exm1741 Words   |  7 PagesMATH 533 Final Exm Click Link Below To Buy: http://hwcampus.com/shop/math-533-final-exm/ Or Visit www.hwcampus.com 1. (TCO A)Consider the following sample data on the age of the 30 employees that were laid off recently from DVC Inc. 21 38 20 26 37 52 37 24 45 20 50 49 44 30 29 42 56 46 60 30 32 25 47 55 38 Read MoreMath 221 Complete Course2525 Words   |  11 PagesMATH 221 COMPLETE COURSE A+ Graded Tutorial Available At: http://hwsoloutions.com/?product=math-221-complete-course Visit Our website: http://hwsoloutions.com/ Product Description PRODUCT DESCRIPTION MATH 221 COMPLETE COURSE, Discussions Week 1 Descriptive Statistics (graded) If you were given a large data set such as the sales over the last year of our top 1,000 customers, what might you be able to do with this data? What might be the benefits of describing the data? Week 2 RegressionRead MoreMgmt 5331840 Words   |  8 PagesMATH 533(Applied Managerial Statistics) Project AJ Davis Department Stores; Part C: Regression and Correlation Analysis Using MINITAB perform the regression and correlation analysis for the data on CREDIT BALANCE (Y) and SIZE (X) by answering the following. 1. Generate a scatterplot for CREDIT BALANCE vs. SIZE, including the graph of the best fit line. Interpret. Scatterplot of Credit Balance($) vs Size 6000 5000 Credit Balance($) 4000 3000 2000 1 2 3 4 Size 5 6 7 TheRead MoreNormal Distribution and Significance Level1847 Words   |  8 PagesMath 221 Week 6 Lab Submitted by: Merima Ceric Part 1. Normal Distributions and Birth Weights in America 1) What percent of the babies born with each gestation period have a low birth weight (under 5.5 pounds)? a) Under 28 = 99.88% The NORMDIST formula was used to calculate: =NORMDIST(5.5,1.88,1.99,True) X= 5.5 Mean= 1.88 Standard Deviation=1.19 b) 32 to 35 weeks = 43.83% The NORMDIST formula