Use the normal distribution to find a confidence interval for a difference in proportions p, P, given the relevant sample results.Assume the results come from random samples.A 90% confidence interval for p₁ - p₂ given that p = 0.78 with n = 590 and p = 0.63 with #₂ = 320Give the best estimate for P₁-P₂, the margin of error, and the confidence interval.Round your answer for the best estimate to two decimal places and round your answers for the margin of error and the confidenceinterval to three decimal places.Best estimate: 0.78Margin of error:Confidence interval: ieTextbook and Mediato

Suppose p1 is the true proportion of 1st population and p2 is the true proportion of 2nd population.

Answered: Use the normal distribution to find a…

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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Heights for teenage boys and girls were calculated. The mean height for the sample of 50 boys was 167 cm and the variance was 57. For the sample of 56 girls, the mean was 153 cm and the variance was 67. There is no reason to assume the variances would be equal. Estimate how much taller teenage boys are using a 99% confidence level. Express this in the (point estimate) ± (margin of error) format. Round answers to 2 decimal places. H
The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
please solve for the following
Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence interval of (1.9.3.1) when estimating the mean height (in centimeters) of a sample of seedlings. The estimated margin of error is The sample mean is
The histogram of the number of hours of sleep Stat 100 students reported getting each night roughly follows the normal curve with an average of 7.0 hours and a SD of 1.2 hours. a. Approximately 68% of the students sleep between hours and hot (Put the smaller number first) 提交答案|Tries 0/5 b. Approximately 95% of the students sleep between hours and hours. (Put the smaller number first) 提交答案| Tries 0/5 c. If a student sleeps 5.2 hours per night what percent of the people sleep more than her? Do the problem in steps: I. First, find the Z score = 提交答案|Tries 0/3 ii. Now, move the red vertical line on the following graph to the correct Z score by clicking and dragging the mouse. If you are using a touch screen, touch and then slide the region around the vertical line 1.00 Shade the region representing the percent of people who sleep more than her: Shade the region under the normal curve to the O left of the red vertical line O right of the red vertical line
A student who took Stat 2 last semester learns that their overall course score was at the 85th percentile. Assuming that a histogram of all the Stat 2 course scores from last semester follows the normal curve, this means that this student had a score that was how many SDs above the average score? Choose the answer that is closest. Group of answer choices 1.15 1.05 1.10 1.0 PreviousNext
Heights for teenage boys and girls were calculated. The mean height for the sample of 51 boys was 183 cm and the variance was 66. For the sample of 71 girls, the mean was 173 cm and the variance was 61. There is no reason to assume the variances would be equal. Estimate how much taller teenage boys are using a 87% confidence level. Express this in the (point estimate) ± (margin of error) format. Round answers to 2 decimal places. H
You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 70 dates, the mean record high daily temperature in a certain city has a mean of 86.37°F Assume the population standard deviation is 14.38 F The 90% confidence interval is ( I) (Round to two decimal places as needed.) The 95% confidence interval is ( D (Round to two decimal places as needed.) Which interval is wider? Choose the correct answer below. The 90% confidence interval The 95% confidence interval Interpret the results. O A. You can be 90% confident that the population mean record high temperature is between the bounds of the 90% confidence interval, and 95% confident for the G50% intonial Click to select your answer(S). 180min ZoT oo
NEED ASAPIndicate the units and draw the graph. Round off to four decimals or in lowest term if fraction.
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Q24 Shamma computed a confidence interval for the mean pH level of bottled water in UAE based on a sample of 50 bottles. She forgot the confidence level she used but still remembers that the critical value she used was 2.861. Which confidence level has Shamma used? 99.6% 95% 90% 99%

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