If the level of confidence is increased while the sample size remains the same, how will the width of a confidence interval for population mean be affected? Assume the population standard deviation is unknown and the population distribution is approximately normal.
A.) The margin of error will increase because the critical value will decrease. The increased margin or error will cause the confidence interval to be wider.
B.) The margin of error will increase because the critical value will increase. The increased margin of error will cause the confidence interval to be wider.
C.) The margin or error will decrease because the critical value will decrease. The decreased margin or error will cause the confidence interval to be narrower.
D.) The margin of error will decrease because the critical value will increase. The decreased margin of error will cause the confidence interval to be narrower.