Test a claim that the mean amount of lead in the air in U.S. cities is less than0.036microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of57U.S. cities is0.039microgram per cubic meter and the standard deviation is0.067microgram per cubic meter. Atα=0.10,can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. Question content area bottomPart 1(a) Identify the claim and stateH0andHa. H0: muμ greater than or equals≥ 0.0360.036Ha: muμ less than< 0.0360.036(Type integers or decimals. Do not round.) The claim is thealternative hypothesis.Part 2(b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/aret0=negative 1.30−1.30.(Use a comma to separate answers as needed. Round to two decimal places as needed.)Part 3Choose the graph which shows the rejection region. A. 0 -44t−t0t0t<−t0, t>t0 A graph labeled t less than negative t 0, t greater than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. Two vertical line segments extend from the curve to the t-axis at the points labeled negative t 0 and t 0, where t 0 is to the right of 0. The areas under the curve to the left of negative t 0 and to the right of t 0 are shaded. B. -4 0 4 tt0t<t0 A graph labeled t less than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. A vertical line segment extends from the curve to the t-axis at a point labeled t 0, where t 0 is to the left of 0. The area under the curve to the left of t 0 is shaded.Your answer is correct. C. -4 0 4 tt0t>t0 A graph labeled t greater than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. A vertical line segment extends from the curve to the t-axis at a point labeled t 0, where t 0 is to the right of 0. The area under the curve to the right of t 0 is shaded. D. 0 -44t−t0t0−t0<t<t0 A graph labeled negative t 0 less than t less than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. Two vertical line segments extend from the curve to the t-axis at the points labeled negative t 0 and t 0, where t 0 is to the right of 0. The area under the curve between negative t 0 and t 0 is shaded.Part 4(c) Find the standardized test statistic, t. The standardized test statistic ist=enter your response here.(Round to two decimal places as needed.) i just need C Answered

Given that Sample size n =57 Sample mean=0.039 Standard deviation =0.067 Solution:- (c) Test statistic ( t ) t = ( x̄ - μ )∕s/√n = (0.039 - 0.036 )∕0.067/√57 = 0.34

Answered: Test a claim that the mean amount of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question content area bottom

Part 1

(a) Identify the claim and state

and

Ha.

H0:	muμ greater than or equals≥ 0.0360.036
Ha:	muμ less than< 0.0360.036

(Type integers or decimals. Do not round.)

The claim is the

alternative

hypothesis.

Part 2

(b) Find the critical value(s) and identify the rejection region(s).

The critical value(s) is/are

t0=negative 1.30−1.30.

(Use a comma to separate answers as needed. Round to two decimal places as needed.)

Part 3

Choose the graph which shows the rejection region.

0 -44t

−t0

t<−t0, t>t0

A graph labeled t less than negative t 0, t greater than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. Two vertical line segments extend from the curve to the t-axis at the points labeled negative t 0 and t 0, where t 0 is to the right of 0. The areas under the curve to the left of negative t 0 and to the right of t 0 are shaded.

-4 0 4 t

t<t0

A graph labeled t less than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. A vertical line segment extends from the curve to the t-axis at a point labeled t 0, where t 0 is to the left of 0. The area under the curve to the left of t 0 is shaded.

Your answer is correct.

-4 0 4 t

t>t0

A graph labeled t greater than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. A vertical line segment extends from the curve to the t-axis at a point labeled t 0, where t 0 is to the right of 0. The area under the curve to the right of t 0 is shaded.

0 -44t

−t0

−t0<t<t0

A graph labeled negative t 0 less than t less than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. Two vertical line segments extend from the curve to the t-axis at the points labeled negative t 0 and t 0, where t 0 is to the right of 0. The area under the curve between negative t 0 and t 0 is shaded.

Part 4

(c) Find the standardized test statistic, t.

The standardized test statistic is

t=enter your response here.

(Round to two decimal places as needed.)

i just need C Answered

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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