A teacher claims that students do better on a second attempt of a test. The following data represents thefirst and second attempt at the same test for five students. Assume the data is normally distributed. Isthere enough evidence to support the claim at a 0.10 level of significance?Complete the table, then find the standard deviation of the difference sa4First Attempt7843626142Second Attempt9539776854Difference dMean d(P- P)Standard Deviationt-Test Statistic Degrees of Freedomd - Hdn-11Round all values to 3 decimal placesa. The standard deviation sa =b. t test statistic =C. At the 0.10 level, the critical value t =

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Answered: A teacher claims that students do…

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 instructor takes a random sample of size from the population data and obtains the following sample data: x 405 385 495 385 555 470 8 The sample standard deviation is, a 69.17 b 66.51 c 63.14 d 61.49
In the 1992 presidential election, Alaska's 40 election districts averaged 1993 votes per district for President Clinton. The standard deviation was 584. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places. a. What is the distribution of X? X ~ N( b. Is 1993 a population mean or a sample mean? Select an answer v C. Find the probability that a randomly selected district had fewer than 2053 votes for President Clinton. d. Find the probability that a randomly selected district had between 2074 and 2208 votes for President Clinton. e. Find the 95th percentile for votes for President Clinton. Round your answer to the nearest whole number.
Listed below are the amounts (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are there any outliers, and are they likely to have much of an effect on the measures of variation? 36 50 50 65 70 75 95 145 175 219 265 350 400 2000 2500 The range of the sample data is (Type an integer or a decimal. Do not dollars?. stadiums. stadiums?. marriages. dollars. marriages?.
A brand of corn flakes come in a box that says it holds 28 ounces of cereal. The manufacturer says that the weights of corn flakes have a normal distribution with a standard deviation of 0.13 ounces. Use the Cumulative Z-Score Table to answer the following questions. The Z-Score Table can be found below by selecting "Read". Round all answers to the nearest box. If the manufacturer ships 730,000 boxes thèn... boxes ...how many boxes weigh less than 27.9025 ounces? boxes ...how many boxes weigh more than 27.9025 ounces? boxes ...how many boxes weigh less than 27.636 ounces? boxes ..how many boxes weight more than 27.636 ounces? boxes ...how many boxes weigh between 27.636 and 27.9025 ounces? Z-Score Table. Question Help: Video Submit Question 9:40 AM
Listed below are the amounts (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are there any outliers, and are they likely to have much of an effect on the measures of variation? 39 50 50 65 65 85 95 160 190 205 270 350 450 2000 3000 The range of the sample data is enter your response here ▼ dollars.dollars. marriages squared .marriages2. marriages.marriages. stadiums.stadiums. stadiums squared .stadiums2. dollars squared .dollars2. (Type an integer or a decimal. Do not round.) The standard deviation of the sample data is enter your response here ▼ marriages.marriages. marriages squared .marriages2. stadiums.stadiums. dollars squared .dollars2. stadiums squared .stadiums2. dollars.dollars. (Round to one decimal place as needed.) The variance of the…
2. 60 matches were played in a football tournament. The table to the right shows the number of goals scored in all matches. Number of Goals 1 3 4 5 Number of Matches 18 20 3 a. Find the median number of goals scored per match. b. Find the mean number of goals scored per match. c. Calculate the standard deviation of the goals scored per match.
The weights for newborn babies is approximately normally distributed with a mean of 6.1 pounds and a standard deviation of 1.8 pounds. Use the Cumulative Z-Score Table to answer the questions below. Write your answers rounded to the nearest whole number. Consider a group of 1200 newborn babies: • How many would you expect to weigh between 7.72 and 9.34 pounds? • How many would you expect to weigh less than 9.7 pounds? How many would you expect to weigh more than 6.37 pounds? How many would you expect to weigh between 6.1 and 7.54 pounds?
Suppose six pet food stores in the area were surveyed, and the following data shows how many types of pet food each of them carries. 7,7,9, 9, 11, 11 Calculate the sample mean and the sample standard deviation. Round your answers to three decimal places. T = Number Number S=
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Listed below are the amounts (dollars) it costs for marriage proposal packages at different baseball stadiums. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. Are there any outliers, and are they likely to have much of an effect on the measures of variation? 36 45 45 60 60 95 95 145 180 216 270 350 400 1750 3000 The range of the sample data is (Type an integer or a decimal. Do not round.)

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