An educator wants to construct a 90% confidence interval for the true proportion of California schoolchildren who are proficient in reading. Suppose that of a simple random sample of 700 California schoolchildren, 70% were proficient in reading. We are interested in the number that were proficient in reading.a) what parameter are we estimating? pb) What is the point estimate of that parameter?c) What is a success for this problem? proficient in readingd) How many successes were there?e) Find the margin of error for a 90% confidence interval, rounded to the 5th. Use your T-table for this.f) Round to the fourth.We are 90% confident that the true proportion of California school children that are proficient in reading isbetweenand

(d) The value of success is obtained below as follows: The value of successes is 490.

Answered: An educator wants to construct a 90%…

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 results: A. Are, or B. Are not significantly: A. High, or B. Low so there: A. is, or B. is not
1a) Manual Transmission Automobiles In 1980 more than 35% of cars purchased had a manual transmission (i.e. stick shift). By 2007 the proportion had decreased to 7.7%. A random sample of college students who owned cars revealed the following: out of 130 cars, 24 had stick shifts. Estimate the proportion of college students who drive sticks with 90% confidence. Use a graphing calculator and round the answers to at least three decimal places. b) Belief in Haunted Places A random sample of 305 college students were asked if they believed that places could be haunted, and 44 responded yes. Estimate the true proportion of college students who believe in the possibility of haunted places with97% confidence. According to Time magazine, 37% of Americans believe that places can be haunted. Round the answers to at least five decimal places. Use a graphing calculator. ___ < p < ___ c) Travel to Outer Space A CBS News/New York Times poll found that 329 out of 763 randomly selected…
When constructing a 90% confidence interval around a sample mean, how many samples out of 100 would you expect to not include the true population mean within their confidence intervals? a. 5 b. 1 c. 0 d. 10
A market research firm has carried out an observational study on the chief executives from a random selection of the law firms in the country. The numerical measures obtained from the analysis of the data are referred to as ______? a) records b) statistics c) parameters d) variables
chapter 7.1
After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation? A) Discard the current data and try a different sample B) Increase the level of confidence for the interval C) Reduce the population variance D) Increase the sample size
According to the M&M candy company, the expected proportion can be found in the table. In addition, the table contains the number of M&M's of each color that were found in a case of candy. At the 10% level, do the observed frequencies support the claim of M&M? M&M Observed and Proportions Brown Green Blue Orange Red Yellow Total 474 540 333 381 2734 Observed Frequencies 642 364 0.24 0.13 0.16 0.20 Expected Proportion 0.13 0.14 State the hypotheses. Ho: The observed frequencies are consistent with the distribution of colors for M&M candies. consistent with the distribution of colors for M&M candies. Ha: The observed frequencies are not Calculate the x² test statistic. Round expected values to two decimal places. Round x² to three decimal places. x² = Calculate the p-value. Round to four decimal places. p-value = State your decision. Since p-value?a, Select an answer Ho. Interpret the results. At the 10% signficance level there Select an answer enough evidence to conclude that the…
Help me solve for C?
B- identify the value of the margin error E . C construct the confidence interval

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