Answered: State the hypotheses and identify the…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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Question

State the hypotheses and identify the claim.
Compute the test statistic
Find the P-value.
Make the decision.
Write the conclusion.

Assume all populations are normally distributed. Test all claims at 0.05.

7. In a random sample of 1020 U.S adults in a recent year, 459 approve of the job the Supreme Court is doing. In another random sample 1510 U.S. adults taken 3 years prior, 694 approved of the job the Supreme Court is doing. Can you support the claim that the proportion of U.S. adults who approve of the job the Supreme Court is doing is less than it was 3 years prior?

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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