Answered: We want to conduct a hypothesis test of…

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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We want to conduct a hypothesis test of the claim that the population mean germination time of strawberry seeds is different from

20.2

days. So, we choose a random sample of strawberries. The sample has a mean of

days and a standard deviation of

1.3

days.

For each of the following sampling scenarios, choose an appropriate test statistic for our hypothesis test on the population mean. Then calculate that statistic. Round your answers to two decimal places.

(a)	The sample has size 13 , and it is from a normally distributed population with an unknown standard deviation.
		=z
		=t
		It is unclear which test statistic to use.

(b)	The sample has size 100 , and it is from a non-normally distributed population with a known standard deviation of 1.1 .
		=z
		=t
		It is unclear which test statistic to use.

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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