HMATH12: Chapter 7-8 Quizz

The _________ is used to gain information about a sample mean

when the variable is normally distributed or when the sample size is 30 or more.

(*Capital letters)

_______ is one aspect of inferential statistics

(*Capital letters)

We refer to the sample statistic as _______ of the population parameter.

(*Capital letters)

The computed sample statistic is called the ______.

(*Capital letters)

__________ is one of the most useful statistical tool that can be applied

to data.

(*Capital letters)

We measure the heights of 50 randomly chosen men, and get a mean height of 180 cm, We also know the standard deviation of men's heights is 60cm.

The 95% Confidence Interval (we show how to calculate it later) is:

180±____cm (*with 3 decimal places)

The average cost per household of owning a brand new car is Php 9,000. Suppose that we randomly selected 50 households, determine the probability that the sample mean for these 50 households is more than Php 9,350. Assume that the variable is normally distributed and the standard deviation is Php 4,230.

The z value is______(*with 4 decimal places)