The Standard Issue Test Prep company offers an ACT prep course designed to help students improve their scores on the ACT exam. A mock exam is given at the beginning of the course to see where students are starting from. A sample of 27 students' scores are taken and given below: Using this data, answer questions below. CAUTION! If you are using your calculator for Parts A and B, double-check that you entered the data in your calculator correctly. One minor mistake in data entry can lead to a drastically different answer! Find the mean: _. Round your answer appropriately. Find the standard deviation: _. Round your answer appropriately. Assuming the population is normally distributed, construct a 95% confidence interval for the mean mock exam. Show all relevant work and follow these expectations: Your work should be easy to read and follow. Use correct notation with any values you find/use so it is easy to know what's what. If you use FORMULAS, write the formula you use BEFORE you substitute the variables with values. Round your answer(s) appropriately. If you use TABLES, briefly describe your process including which table you use. If you use your CALCULATOR, including the input and any commands used. Write your answer using the following format: (lower endpoint, upper endpoint). A rival test preparation company claims that students at the Standard Issue Test Prep company score 27 on average on the mock exam. Using just the work from the previous parts above and without performing a formal hypothesis test, do you think the claim from the rival test company should be rejected or considered? Give a reason to support your answer.

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

Related questions

Question

CHART ATTACHED.

PLEASE USE EXCEL FORMULAS FOR ME TO FOLLOW WHEN APPLICABLE

The Standard Issue Test Prep company offers an ACT prep course designed to help students improve their scores on the ACT exam. A mock exam is given at the beginning of the course to see where students are starting from. A sample of 27 students' scores are taken and given below:

Using this data, answer questions below. CAUTION! If you are using your calculator for Parts A and B, double-check that you entered the data in your calculator correctly. One minor mistake in data entry can lead to a drastically different answer!

Find the mean: ___________________. Round your answer appropriately.
Find the standard deviation: ___________________. Round your answer appropriately.

Assuming the population is normally distributed, construct a 95% confidence interval for the mean mock exam. Show all relevant work and follow these expectations:

Your work should be easy to read and follow. Use correct notation with any values you find/use so it is easy to know what's what.
If you use FORMULAS, write the formula you use BEFORE you substitute the variables with values. Round your answer(s) appropriately.
If you use TABLES, briefly describe your process including which table you use.
If you use your CALCULATOR, including the input and any commands used.
Write your answer using the following format: (lower endpoint, upper endpoint).

A rival test preparation company claims that students at the Standard Issue Test Prep company score 27 on average on the mock exam. Using just the work from the previous parts above and without performing a formal hypothesis test, do you think the claim from the rival test company should be rejected or considered? Give a reason to support your answer.

19
18
33
22
13
22
33
29
33
26
10
15
31
13
11
13
19
31
13
35
20

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

Expert Solution