Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 136 first-graderswho were learning English were asked to identify as many letter sounds as possible in a period of one minute. The average number of letter sounds identifiedwas 34.01 with a standard deviation of 23.83.Part: 0/2Part 1 of 2(a) Construct a 90% confidence interval for the mean number of letter sounds identified in one minute. Round the answers to at least two decimal places.A 90% confidence interval for the mean number of letter sounds identified in one minute is<μ<0.8 民回〗AB9

Givensample size(n)=136Mean(x)=34.01standard deviation(s)=23.83confidence level=90%

Answered: Sound it out: Phonics is an…

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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Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 137 first-graders who were learning English were asked to identify as many letter sounds as possible in a period of one minute. The average number of letter sounds identified was 34.06 with a standard deviation of 23.64. Part: 0/2 Part 1 of 2 (a) Construct a 95% confidence interval for the mean number of letter sounds identified in one minute. Round the answers to two decimal places. 0. A 95% confidence interval for the mean number of letter sounds identified in one minute is Skip Part Check X MacBook Air < F< S Save For Later 000 118 00 Submit Assignment © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
na test of the effectiveness of garlic for lowering cholesterol, 47 subjects were treated with garlic in a processed tablet form. Cholesterol levels were measured before and after the treatment. The changes (before - after) in their levels of LDL cholesterol (in mg/dL) have a mean of 3.4 and a standard deviation of 19.8. Construct a 95% confidence interval estimate of the mean net change in LDL cholesterol after the garlic treatment. What does the confidence interval suggest about the effectiveness of garlic in reducing LDL cholesterol? Click here to view a t distribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the confidence interval estimate of the population mean µ? Omg/dL
In a random sample of 63, the proportion of the sample with a certain characteristic was 0.61. What is the 95% confidence interval for pp?
Hip surgery: In a sample of 117 hip surgeries of a certain type, the average surgery time was 135.7 minutes with a standard deviation of 21.9 minutes. Answer the following questions.
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Energy drinks: A survey of college students reported that in a sample of 402 male college students, the average number of energy drinks consumed per month was 2.41 with a standard deviation of 3.18, and in a sample of 390 female college students, the average was 1.50 with a standard deviation of 4.77. Part: 0/2 Part 1 of 2 Construct a 80% confidence interval for the difference between men and women in the mean number of energy drinks consumed. Let μ, denote the mean number of energy drinks consumed by men. Use tables to find the critical value and round the answers to at least two decimal places. A 80% confidence interval for the difference between men and women in the mean number of energy drinks consumed is 0<44-₂2 <0. X S Part: 1/2 Part 2 of 2 Based on the confidence interval, is it reasonable to believe that the mean number of energy drinks consumed may be the same for both male and female college students? It (Choose one) reasonable to believe that the mean number of energy drinks…
Question H The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 1261 chips and a standard deviation of 118 chips. (a) Determine the 28th percentile for the number of chocolate chips in a bag. (b) Determine the number of chocolate chips in a bag that make up the middle 96% of bags. (c) What is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies? (a) The 28th percentile for the number of chocolate chips in a bag of chocolate chip cookies is (Round to the nearest whole number as needed.) chocolate chips. (b) The number of chocolate chips in a bag that make up the middle 96% of bags is | (Round to the nearest whole number as needed. Use ascending order.) chocolate chips. to (c) The interquartile range of the number of chocolate chips is (Round to the nearest whole number as needed.) Enter your answer in each of the answer boxes. 11:59pm thase Options A0.50LA Type here to search
Strength of concrete: The compressive strength, in kilopascals, was measured for concrete blocks from five different batches of concrete, both three and six days after pouring. The data are as follows: 1 2 3 4 5 After6days 1376 1370 1366 1381 1351 After3days 1336 1315 1353 1354 1322 construct a 99.9% confidence interval for the difference between the mean strengths of blocks cured three days and blocks cured six days. Let d represent the strength of blocks cured six days minus the strength of blocks cured three days. Use the TI-84
Sound it out: Phonics is an instructional method in which children are taught to connect sounds with letters or groups of letters. A sample of 141 first-graders who were learning English were asked to identify as many letter sounds as possible in a period of one minute. The average number of letter sounds identified was 34.09 with a standard deviation of 23.44 . Part: 0 / 2 0 of 2 Parts Complete Part 1 of 2 (a) Construct a 90% confidence interval for the mean number of letter sounds identified in one minute. Round the answers to two decimal places. A 90% confidence interval for the mean number of letter sounds identified in one minute is <<μ .
A random sample of 55 airline pilots had an average yearly income of $99,000 with a standard deviation of $15,000. If we want to determine a 95% confidence interval for the average yearly income, what is the value of t? Develop a 95% confidence interval for the average yearly income of all pilots.
At what age do infants speak their first word of English? Here are 20 data of children (age in month) 15 26 10 9 15 20 18 11 8 20 7 9 10 11 11 10 12 17 11 10 whAt is 99% confidence interval for the mean age at which children speak first words? Upper limit? lower limit?
Six students were given a memory recall test on an empty stomach, then again after eating a 500-calorie meal. Estimate the mean difference in memory recall scores between the two groups using 95% confidence. Empty Stomach 57 68 82 94 85 100 After Eating 68 75 91 90 85 100

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