Use the following graph to answer the questions below. 1.0 0.8 0.6 0.4 0.2 0.0 -5 -2 4 1. Which normal curve(s) has/have a mean of –2? The all • curve 2. Which normal curve(s) has/have a mean of 0? The green and blue : curve 3. Which normal curve has the largest standard deviation? The blue • curve 4. Which normal curve the smallest standard deviation? The yellow * curve

Use the following graph to answer the questions below. 1.0 0.8 0.6 0.4 0.2 0.0 -5 -2 4 1. Which normal curve(s) has/have a mean of –2? The all • curve 2. Which normal curve(s) has/have a mean of 0? The green and blue : curve 3. Which normal curve has the largest standard deviation? The blue • curve 4. Which normal curve the smallest standard deviation? The yellow * curve

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Description: Use the following graph to answer the questions below.1.00.80.60.40.20.0-5-241. Which normal curve(s) has/have a mean of –2? Theall• curve2. Which normal curve(s) has/have a mean of 0? Thegreen and blue : curve3. Which normal curve has the largest s

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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4 The table shows the number of orthodontist visits per year made by the students in Grade 10. https://ww find-the-st with-a-gra Number of visits 0 46 8 10 12 14 Frequency 3 2 8 4 2 12 5 a Find the mode, the median and the mean, and comment on which is the most appropriate o use. b Find the standard deviation and comment on the result. C Find the range and interquartile range, and comment on the spread of the data.
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physical fitness association is including the mile run in its hight school fitness test. The time for this event is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 50 seconds. The fitness association wants to recognize students whose times are among the top (or fastest) 10% with certificates of recognition. What time would a student need to beat in order to earn a certificate of recognition from the fitness association? Round to one decimal place. A. 395.9 sec B. 377.8 sec C. 524.1 sec D. 542.2 s
Heights of boys in a high school are approximately normally distributed with a mean of 175 cm and a standard deviation of 5 cm. What is the first quartile (25%) of heights? (Hint. you need to find the Z-score associated with 25th percentile from the table on page 410) a. 165.8 cm b. 169.6 cm c. 171.7 cm d. 173.5 cm e. 181.0 cm
3.1 The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) 2.1 below. 1.6 0.7 Assume the population is normally distributed. 2.2 1.4 0.2 (a) Find the sample mean. x= (Round to two decimal places as needed.) (b) Find the sample standard deviation. S= (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean . A 90% confidence interval for the population mean is (Round to two decimal places as needed.) 2.1 2.7- 4.0 3.8 3.3
age, a Bahand will last 6.3 days from the time it is purchased in the store to the time it is too rotten to eat. Is the mean time to spoil different if the banana is hung from the ceiling? The data show results of an experiment with 15 bananas that are hung from the ceiling. Assume that that distribution of the population is normal. 5.5, 3.9, 3.9, 5.7, 6.5, 5.9, 3.9, 7.4, 4.3, 5.9, 4.5, 4.2, 7, 5.1, 4 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ? Select an answer H₁: ? Select an answer c. The test statistic ? O (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) d. The p-value = e. The p-value is ? a f. Based on this, we should Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the populaton mean is significantly different from 6.3 at a = 0.05, so there is…
8. (Topic 8) Suppose the average height of a two year old male is normally distributed with a mean of 34.2 inches and a standard deviation of 2.9 inches. Use this information to answer each part below. (a) What is the z-score associated with a two year old male that is 38 inches tall? Would this child be considered unusually tall for his age? (b) What is the z-score associated with a two year old male that is 28 inches tall? Would this child be considered unusually short for his age?
The lengths of pregnancies in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days.In what range would you expect to find the middle 50% of most pregnancies?Between and .If you were to draw samples of size 56 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample?Between ______ and _______.
Three box-and-whisker plots are shown side-by-side on the same scale. 200-1 1 180-| 1 160 - 1 140-| 120 H 1 100-| 1 80-1 1 60-1 1 40-| A B с Which of the three groups has the largest median? Explain your reasoning. Which of the 3 groups has the largest standard deviation? Explain your reasoning. Which of the groups will most certainly have a MEAN that is above its median? 1 Which of the groups will most certainly have a MEAN that is near or at its median? Which of the groups will most certainly have a MEAN that is below its median? Which group would you expect to have the largest mean?
Assume the samples are random and independent, the populations are nomally distributed, and the population variances are equal. The table available below shows the prices (in dollars) for a sample of automobile batteries. The prices are classified according to battery type. At a = 0.10, is there enough evidence conclude that at least one mean battery price is different from the others? Complete parts (a) through (e) below. E Click the icon to view the battery cost data. (a) Let u1. P2. H3 represent the mean prices for the group size 35, 65, and 24/24F respectively. Identify the claim and state Ho and H. H Cost of batteries by type The claim is the V hypothesis. Group size 35 Group size 65 Group size 24/24F 101 111 121 124 D 146 173 182 278 124 140 141 89 (b) Find the critical value, Fo, and identify the rejection region. 90 79 84 The rejection region is F Fo, where Fo = (Round to two decimal places as needed.) (c) Find the test statistic F. Print Done F= (Round to two decimal places as…
Why does the graph on the right have a higher standard deviation? 3 4 5 6 7 1 2 3 4 5 6 7 1 2 What is meant by the term "variability"? You are working at Kingsville Hearing Aid Clinic, documenting the number of visits per year for each client. The mean is 14.3 visits per year and the standard deviation is 6.2. • What percent of people have fewer than 10 visits per year? • How many visits per year are needed to enter the top 25%? • A client named Ezekiel visited the clinic 9 times. What percentile is he? • Your mother visited the clinic last year. Her number of visits was 3 standard deviations above the mean. How many times did she visit the clinic?
The __________ __ __ ______ of a random sample is the graph of its theoretical normal percentiles paired with corresponding actual percentiles of the random sample. A. scatterplot B. normal q-q plot C. fitted histogram D. unbiased estimator