when the level of confidence increases the confidence interval

The formula for the confidence interval for a variance is _________ . => IV. or II. or III. or I...

Select the correct representation of a 95% confidence level case. => figure - 1 or figure - 4 or figure - 3 or figure - 2..

What is meant by 95% confidence interval of the mean? => 95% of the specific sample means will fall within ± 1.96 standard errors of the population mean. or 95% of the specific sample means will fall within ± 2.58 standard errors of the population mean. or There is..

When a 95% confidence interval is calculated instead of a 90% confidence interval with the same sample, the maximum error of estimate will be _____ . => either smaller or larger depending on sample size or the same or smaller or larger..

If 95% confidence interval for the average age of the club members is 39 < μ < 41, then which of the following could be 99% confidence interval? => 39.4 < μ < 40.6 or 39.5 < μ < 40.5 or 39 < μ < 41 or 38 < μ < 42 o..

A survey of 120 families showed that at least 78 had a computer at home. Find the 99% confidence interval of the true proportion of families who own a home computer. => 64.5% < p < 65.5% or 5.38% < p < 7.62% or 53.8% < p < 76.2% or 60.6% < p < 69.4%..

The data shows the deaths related to bad weather over 6 years. Find the F-test value and verify whether the variances differ at 90% confidence level. => 7.68, differ or 9.33, do not differ or 5.05, differ or 4.96, do not differ..

The number of females working in a company is 200 out of 500 and that of another company is 350 out of 600. Do both the proportions differ significantly at 90% and 99% confidence levels? => differ at 90% and do not differ at 99% or do not differ at both 90% and 99% or differ at ..

The number of females in a class is 26 out of 65 and in that school is 314 out of 748. Check whether the proportions differ at 95% and 99% confidence levels or not. => do not differ at 95% and at 99% or do not differ at 95% and differ at 99% or differ at 95% and do not differ at..

Select the correct statement(s). I. An interval estimate always contains the value of the parameter being estimated. II. To be more confident that the interval contains the true population mean, the interval shall be more narrow. => I only or II only or none ..