Do 60% of student prefer iPhone and 40% prefer Android? A Lecturer is interested in the type of Mobile phone students use. He surveyed a sample of 45 male and female students and asked them whether they use iPhone or Android. IPhone Android Total Observe 25 20 45 Perform an appropriate hypothesis test to answer the above research question. -Enter the values for H0. H0:π1= π2= -The alternate hypothesis is: (Choose from A or B or C) A. H0:π1≠π1≠ 0.6 B. The proportions are not as stated C. Something else From the following sample, calculate the expected number in each group (to two decimal places) and place your answers in the boxes provided. iPhone Android Total Observed Expected 25 ? 20 ? 45 45 The assumption is: Choose from below -The boxplots indicate that the samples are fairly symmetric and the spreads are similar, so we can assume both sets of data come from normal distributions with the same spread -The points are randomly scattered around a straight line, so the assumptions of linearity and constant spread are satisfied. The shape of the histogram indicates that the residuals come from a normal distribution -The shape of the histogram indicates that the scores may be from a normal distribution and/or the sample size is reasonably large so the sample mean will be from a normal population Since the population is normal, therefore sample means follow a normal distribution -None of these -All expected counts ≥5, hence the chi sq GOF test is valid.

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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Research Question: Do 60% of student prefer iPhone and 40% prefer Android?

A Lecturer is interested in the type of Mobile phone students use.

He surveyed a sample of 45 male and female students and asked them whether they use iPhone or Android.

IPhone

Android

Total

Observe

Perform an appropriate hypothesis test to answer the above research question.

-Enter the values for H₀.

H₀:π1=

π2=

-The alternate hypothesis is: (Choose from A or B or C)

A. H₀:π1≠π1≠ 0.6

B. The proportions are not as stated

C. Something else

From the following sample, calculate the expected number in each group (to two decimal places) and place your answers in the boxes provided.

iPhone

Android

Total

Observed

Expected

The assumption is: Choose from below

-The boxplots indicate that the samples are fairly symmetric and the spreads are similar, so we can assume both sets of data come from normal distributions with the same spread

-The points are randomly scattered around a straight line, so the assumptions of linearity and constant spread are satisfied. The shape of the histogram indicates that the residuals come from a normal distribution

-The shape of the histogram indicates that the scores may be from a normal distribution and/or the sample size is reasonably large so the sample mean will be from a normal population

Since the population is normal, therefore sample means follow a normal distribution

-None of these

-All expected counts ≥5, hence the chi sq GOF test is valid.

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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