Question 2: Scores on IQ tests have a bell-shaped distribution with mean deviation o = 15. Discuss what the Empirical Rule implies concerning individuals with IQ scores of 115, 130, and 145. 100 and standard %3D

Question 2: Scores on IQ tests have a bell-shaped distribution with mean deviation o = 15. Discuss what the Empirical Rule implies concerning individuals with IQ scores of 115, 130, and 145. 100 and standard %3D

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...

See similar textbooks

Similar questions

QUESTION 2 A minimum mileage guarantee on the tires of a tire manufacturing company is being considered to be set. When the company conducted many tire tests, it revealed that the mean mileage has a normal distribution with mean 2,752 and standard deviation 119. The tire manufacturer wants to set the minimum guaranteed mileage so that no more than 2.5 percent of tires will have to be exchanged. Calculate the Lower limit of guaranteed mileage? (Round answer to two decimal places ex. 2.09)
QUESTION 1 Annual per capita consumption of milk is 21.5 gallons with a standard deviation of 4.8 galons. Being from the Midwest, you belleve milk consumption is higher there and wish to support your opinion A sample of 30 individuals from the Midwestern town of Webster City showed a sample mean annual consumption of 24.1 galons Which hypotheses can be used to determine whether the mean annual consumption in Webster City is higher than the national mean? Hou or equal to 216 Hau<218 Hou or equal to 21.0 H21.6 Hou 210 Ha: u not equal to 21.0 None of the above QUESTION 2 What is the value of the test statistic? 05206 28527 2400 QUESTION 3 What is the p-value? 00978 0022 38004 O. 9956
QUESTION 19 It was found that the mean annual turnover rate of the Aspirin medicine bottle is 19. The management think that the mean is changed. Therefore, a random sample of 86 is chosen that shows the average is 14 and the standard deviation is 14. Use 0.00 significance level to test this claim Bosed on the above, the test statistic is equal to? (Round answer to two decimal places ex. 2.09)
QUESTION 10 A magazine article cliams that the mean time of evening long-distance calls is 15.2 minutes per call. A researcher wished to test the claim and selected a random sample of 49 calls. She found that the mean time was 15.9 minutes and standard deviation was 5 minutes. Using a 0.05 level of significance, is there sufficient evidence to support the claim? Op-value=0.327, there is enough evidence to support the claim. p-value=0.164, there is enough evidence to support the claim. p-value=0.164, there is not enough evidence to support the claim. O p-value=0.327, there is not enough evidence to support the claim. QUESTION 11 The inspector at a manufacturing company claims that more than 2% of the produced smoke detectors are defective. A random sample of 255 smoke detectors is selected of which 10 are defective. Find the p-value of the test. (Round your answer to three decimal places).
on 5 of 21 The heights of women aged 20-29 in the United States are approximately Normal with mean 64.1 inches and standard deviation 3.7 inches. Men the same age have mean height 69.4 inches, with standard deviation 3.1 inches. Cheryl D. Fryar et al., "Anthropometric reference data for children and adults: United States, 2011-2014," Vital and Health Statistics, Series 3, no. 39 (August 2016), at www.cdc.gov/nchs. This report provides the means of various anthropometric measurements. Standard deviations were computed from the sample size and reported standard errors of the mean. Instructions on measuring upper arm length are in the National Health and Nutrition Examination Survey: Anthropometry Procedures Manual, January 2007. Side-by-Side O Macmillan Learning What is the z-score for a woman 5.5 feet tall? Give your answer to two decimal places. Z =
Question 6 In a random sample of 12 adults each of them ate 100 g of dark chocolate and in another random sample of 15 adults each of them ate 100 g of mik cho plasma antioxidant capacity was measured and the summary statistics are given below. Sample mean Sample standard deviation Dark chocolate (DC) Milk chocolate (MC) 171.5 6.8 165.0 7.2 At 5% significance level do the data provide sufficient evidence that dark chocolate produces different mean level of total blood plasmà antioxidant c Assume that the population distributions are normal with equal variance. a. The alternative hypothesis is H1: Pparkc (/ +) HMIKC b. The test statistic t= (round at two decimal places) c. The degrees of freedom (d.f.) = d. The critical value of the test = (do not round up). than the critical value, we (accept/reject) e. As the test statistic is (less/greater) produce different mean level of total blood plasma antioxidant capa that dark chocolate (does/does not) -tailed test. f. The above test is a…
QUESTION 9 Assume that adults have IQ scores that are normally distributed with a mean of mu = 105 and a standard deviation sigma = 15. Find the probability that a randomly selected adult has an IQ between 85 and 125 and type an integer or decimal rounded to four decimal places. Make sure to use the positive or negative z score charts attached, in the eBook on MSL, or in a hardcopy of the textbook neg z scores.pdf pos z scores.pdf A. 0.4177 В. 0.5763 O C. 0.8176 D.0.6139 QUESTION 10 Assume a population of 40, 45, 47, and 53. Assume that samples of sizen=2 are randomly selected with replacement from the population. Listed below are the sixteen different samples. 45 53 53 53 45 40 45 45 45 47 40,53 4753 40 40 40,45 40 47 47 40 47 45 47 47 63 40 53 45 53 47 Click Sqve and Submit to saue and submit. Chck Save All Answers to save all ansuers. Save All An M
A study was conducted to identify the relationship between the Body Mass Index (BMI) andthe time (in minutes) spent to exercise. Which of the following measure is suitable tocompare the variability of the two variables?(a) Standard deviation(b) Median(c) Coefficient of variation(d) Interquartile range
The heights of women aged 20 to 29 are approximately Normal with mean 64 inches and standard deviation 2.7 inches. Men the same age have mean height 69.3 inches with standard deviation 2.8 inches. (a) What is the z-score for a woman 70 inches tall? z-score = What is the z-score for a man 80 inches tall? z-score =
QUESTION 27 Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean of 120 and a standard deviation of 16. What proportion of patients have glucose levels exceeding 115?
Question 6 95 U Vetalis The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-shaped distribution. This distribution has a mean of 38 and a standard deviation of 10. Using the empirical rule, what is the approximate percentage of 1-mile long roadways with potholes numbering between 8 and 48? Do not enter the percent symbol. ans = Question Help: DPost to forum