The following distribution is for the number of children in a family. Find the mean number of children in a family to two decimal places Y 0 1 2 3 4 5 6 7 8 9 10 P(Y) .12 .16 .24 .10 .08 .06 .06 .05 .05 .04 .04

The following distribution is for the number of children in a family. Find the mean number of children in a family to two decimal places Y 0 1 2 3 4 5 6 7 8 9 10 P(Y) .12 .16 .24 .10 .08 .06 .06 .05 .05 .04 .04

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The following bivariate data set contains an outlier. y 69.5 1231.5 52.6 -468 80.8 2623.2 44.4 -493.6 24.3 -1666.1 69.2 -2895.6 64.5 -2829.4 51.1 -3467 63.3 -2696.9 62.3 -189.3 60.1 2256.8 78 1827.7 83.8 -1501.7 57.3 1099 262.3 -21737.6 What is the correlation coefficient with the outlier? Enter your answer rounded to 3 decimal places. w = What is the correlation coefficient without the outlier? (Hint: The last row is the outlier.) Enter your answer rounded to 3 decimal places. rwo Would inclusion of the outlier change the evidence for or against a significant linear correlation? O Yes. Including the outlier changes the evidence regarding a linear correlation. O No. Including the outlier does not change the evidence regarding a linear correlation.
Could you help me answer this one, I think the answer is 3.
The following data represent the number of people aged 25 to 64 years covered by health insurance (private or government) in 2018. Approximate the mean and standard deviation for age. Age Number (millions) 25-34 35-44 45-54 55-64 25.1 33.2 39.6 24.5 (Type an integer or decimal rounded to two decimal places as needed.)
The following data represent the number of people aged 25 to 64 years covered by health insurance (private or government) in 2018. Approximate the mean and standard deviation for age. Age 25-34 35-44 45-54 55-64 Number (millions) 20.820.8 31.931.9 36.736.7 21.721.7
Be my Valentine: The following frequency distribution presents the amounts, in dollars, spent for Valentine's Day gifts in a survey of 120 U.S. adults in a recent year. Approximate the mean amount spent on Valentine's Day gifts to two decimal places. Amount Frequency 0 - 19.99 19 20.00 - 39.99 13 40.00 - 59.99 21 60.00 - 79.99 19 80.00 - 99.99 9 100.00 - 119.99 10 120.00 - 139.99 7 140.00 - 159.99 8 160.00 - 179.99 7 180.00 - 199.99 1 200.00 - 219.99 3 220.00 - 239.99 2 240.00 - 259.99 1
The average number of cavities that thirty-year-old Americans have had in their lifetimes is 7. Do twenty-year-olds have a different number of cavities? The data show the results of a survey of 11 twenty-year-olds who were asked how many cavities they have had. Assume that the distribution of the population is normal. 4, 8, 5, 7, 7, 4, 8, 5, 4, 4, 6 H0=? H1=? The test statistic = ? (please show your answer to 4 decimal places.) The p-value = ? (Please show your answer to 5 decimal places.)
A certain brokerage house wants to estimate the mean daily return on a certain stock. random sample of 12 days yields the following return percentages. -1.56, -1.89, -0.28, -0.55, 1.92, 2.12, 1.77, -2.47, 2.63, - 1.06, 0.29, 1.42 Send data calculator Send data to Excel If we assume that the returns are normally distributed, find a 95% confidence interval for the mean daily return on this stock. Then find the lower limit and upper limit of the 95% confidence interval, Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit: l Upper limit:
Which distribution's height begins low, increases until the middle, and then decreases in a symmetrical manner? 1. uniform 2. normal 3. skewed
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The frequency of repair for the trucks owned by a trucking firm over a 5-year period has been tabulated. The results are shown in the following frequency distribution.
The average house has 11 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 14 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 12, 13, 12, 12, 12, 11, 13, 12, 13, 11, 10, 12, 11, 13 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer H1: Select an answer c. The test statistic ? ▼ (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is (? v f. Based on this, we should | Select an answer the null hypothesis. g. Thus, the final conclusion is that ... The data suggest the population mean is not significantly more than 11 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers' houses…
Approximate the mean for the following data set. Round your answer to one decimal place. Class Frequency 0-12 13-25 12 26-38 8. 39-51 12 52-64 11