QUESTION 1Suppose we are trying to calculate a 99% confidence interval for a population mean height of children ages 5 to 10 in the UnitedStates. To do this, we use a sample of size 180 children between 5 and 10. From that sarmple, we get a sample mean of 104 cm anda sample standard deviation of 11.5 cm. What critical number do we need to use to make this confidence interval? Use StatCrunchand round your answer to 3 decimal places.QUESTION 2uct a 15% confilence interval for a one sample population proportionSuppose you ae planning toThrough use of StatCrunch, what would the value of your critical number need to be?QUESTION 3

According to bartleby we can answer any one question Question 1 According to the given information…

Answered: QUESTION 1 Suppose we are trying to…

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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QUESTION 8 Given a sample mean 59.86 and a margin of error 2.77, what is the left boundary of the confidence interval to estimate the population mean? Round your answer to 2 decimal places. QUESTION 9
Question 81 parts D and E
Question 2 Scientists believe that global warming has changed the mean temperature. To measure this effect is construct a 90% confidence interval for the sample mean. The sample standard deviation of the minimum temperature in the Salt Lake area is 2.47, and the sample mean is 42.35 on 36 degrees of freedom. The mean temperature of the daily minimum in SLC was 39.22 before 1980. If this mean value is not contained in the confidence interval we reject the null hypothesis. See: https://www.nytimes.com/2019/02/28/learning/teach-about-climate-change-with-these-24- new-york-times-graphs.html e Note this is real data obtained from the weather stations in SLC. (41.92,42.79 No answer text provided. (41.9,42.8) O (41.7,43) O (41.83,42.88)
QUESTION 1 A recent study of over 1000 parents on cyberbullying showed that a 95% confidence interval of proportion of kids who faced bullying in social media sites and apps is (0.1200, 0.1433). Find the sample proportion of kids who faced bullying in social media sites and apps. Round your answer to four decimal places. QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places. QUESTION 3 The daily electrical energy consumption (in Watts) during July for a random sample of households was recorded. The mean was 3399 W and the standard deviation was 316 W. Assume the underlying distribution of the consumption is normal. Find the marging of error E of the 95% confidence interval for the mean daily electrical energy consumption during that month.…
QUESTION 26 The waiting time (in minutes) of customers at a fast food outlet is normally distributed. A random sample of 15 customers is selected and the 99% confidence interval for the population mean waiting time is obtained as (1.83,2.59). Find the standard deviation used to construct the 99% confidence interval. Round your answer to three decimal places.
QUESTION 18 In a bakery, a sample of 19 days was taken to study the daily sales. It was found that the mean daily sales are 124 with a sample standard deviation is 68. The 98 percent upper confidence limit for the population mean a daily sale would be? (Round answer to two decimal places ex. 2.09)
Question 5 Assume that a sample is used to estimate a population mean p. Find the 90% confidence interval for a sample of size 71 with a mean of 57.2 and a standard deviation of 20.7. Enter your answer as an open- interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 90% C.I. %3D Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Submit Question
QUESTION 30 The waiting time (in minutes) of customers at a fast food outlet is normally distributed. A random sample of 16 customers is selected and the 99% confidence interval for the population mean waiting time is obtained as (1.95,2.64). Find the standard deviation used to construct the 99% confidence interval. Round your answer to two decimal places.
question#5 Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval for a sample of size 73 with a mean of 26.5 and a standard deviation of 14.4. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.99.5% C.I. =
Question 5, 8.3.49
Question 1 There are hundreds of apples on the trees, so you randomly choose just 44 apples and get a mean weight of 85.12 grams with a standard deviation of 6.86 grams. Assuming that the weight of the apples is normally distributed, what is the standard error of the 90% confidence interval for the mean weight of the apples. Note: Round your answers to 4 decimal places.
> Question 27 You plan to build a Confidence Interval to estimate a population proportion. Find the minimum sample size needed to guarantee with 89% probability that your estimate is within a 5% Margin of Error of the true population proportion. Keep at least three decimals in any intermediate calculations. Enter a whole number. Submit Question ctor MacBook Air D00 F2 F3 F4 F5 F6 F7 F9 F8 F10 @ %23 %24 & 3. 5 7 8. W R. Y D G K 91

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