If the 95% confidence interval for a populationmean from a certain sample is (-6.3, 4.5), then(a)thesampleismean(b)themarginoferroris

Given that,95% C.I. for a population mean from a certain sample is (-6.3, 4.5)

Answered: If the 95% confidence interval for a…

If the 95% confidence interval for a population mean from a certain sample is (-6.3, 4.5), then (а) the sample mean is (b) the margin of error is

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Create a confidence interval for a population mean from a sample of size 61 with sample mean ¯x = 5.1 if the margin of error is know to be $0.61. ( , ) [three decimal accuracy] [three decimal accuracy]
A researcher has 56 pairs of participants who each experience two different experimental conditions. The mean for the first condition was is 34.27 and the mean for the second condition is 33.67. Assuming that tcv(N = 55, α = .05) = 2.004 and sMD = .65, what is the value of the 95% confidence interval?
A random sample of n1 = 213 people who live in a city were selected and 80 identified as a "dog person." A random sample of n2 = 98 people who live in a rural area were selected and 61 identified as a "dog person." Find the 90% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person." Round answers to to 4 decimal places. Рі — Р2
In constructing a 98% confidence interval for the mean of a population with variance 25, how large a sample must be used to ensure that the margin of error does not exceed 0.8? Calculation.
A sample of 66 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 24.7 years. The population variance is 18. (a) Give a point estimate for u. (Give your answer correct to one decimal place.) (b) Find the 95% confidence interval for u. (Give your answer correct to two decimal places.) Lower Limit Upper Limit (c) Find the 99% confidence interval for u. (Give your answer correct to two decimal places.) Lower Limit Upper Limit
A simple random sample of n=18 is drawn from a population that is normally distributed with �=19 . The sample mean is found to be �¯=64 . Construct a 80% confidence interval for the population mean. Confidence interval: (,)
A random sample of n₁ = 269 people who live in a city were selected and 88 identified as a "dog person." A random sample of n2 = 90 people who live in a rural area were selected and 70 identified as a "dog person." Find the 99% confidence interval for the difference in the proportion of people that live in a city who identify as a "dog person" and the proportion of people that live in a rural area who identify as a "dog person." Round answers to to 4 decimal places. < P1 P2 <
There are two traffic lights on a commuter's route to and from work. Let X1 be the number of lights at which the commuter must stop on his way to work, and X2 be the number of lights at which he must stop when returning from work. Suppose that these two variables are independent, each with the pmf given in the accompanying table (so X1, X, is a random sample of size n = 2). X1 1 2 p(x1) | 0.3 0.4 0.3 H = 1, o² = = 0.6 (a) Determine the pmf of To = X1 + X2. 2 3 4 to p(t,) (b) Calculate ит. HTo How does it relate to u, the population mean? "To 2 (c) Calculate o 2 OTo How does it relate to o, the population variance? 2 OTO (d) Let X3 and X4 be the number of lights at which a stop is required when driving to and from work on a second day assumed independent of the first day. With T, = the sum of all four X;'s, what now are the values of E(T) and V(T,)? E(T.) V(T,) = 8) and P(T, 2 7) [Hint: Don't even think of listing all possible outcomes!] (e) Referring back to (d), what are the values of…
The following results come from two independent random samples taken of two populations. Sample 1 Sample 2 n1 = 60 n2 = 25 X1 = 13.6 X2 = 11.6 01 = 2.4 02 = 3 (a) What is the point estimate of the difference between the two population means? (Use x, - x,.) (b) Provide a 90% confidence interval for the difference between the two population means. (Use x, - x,. Round your answers to two decimal places.) to (c) Provide a 95% confidence interval for the difference between the two population means. (Use x, - x,. Round your answers to two decimal places.) to
What is the formula for CONFIDENCE INTERVAL (CI) FOR μ1 – μ2 (TWO INDEPENDENT SAMPLES)?
A random sample of 5 students was taken on the midterm exam score. It was recorded as {37, 40, 55, 80 and 98}. Suppose that the population size is very large. Answer the following questions.(a) Find 80% confidence interval for the population mean.(b) A confidence interval for the population mean was calculated as [36.878 , 87.122]. Find the confidence level of the interval.
A sample of 18 items provides a sample standard deviation of 6.(A). Compute the 90% confidence interval estimate of the population standard deviation. (B). Compute the 95% confidence interval estimate of the population variance.