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1. A survey of 40 people was conducted to compare their self reported height to their...

1. A survey of 40 people was conducted to compare their self reported height to their actual height. the difference between reported height and actual height was calculated.
you’re testing the claim that the mean difference is greater than 0.9.
From the sample, the mean difference was 1.25, with a standard deviation of 0.46.
calculate the test statistic, rounded to two decimal places.

2. You are conductinf a study to determine if there is a significant difference between typical salaries of surgeons and stock brokers (in thousands of dollars). Calculate the test statistics, t, with the following sample data.
n1= 25, x1 = 195, s1=10
n2=55, x2=197, s2=7
round ro 2 decimal places.
Math   Statistics-And-Probability   
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Answer #1

. 1

Given,

Hypothesis is,

We know that the test statistic is,

2.

Given,

n1= 25, x1 = 195, s1=10

n2=55, x2=197, s2= 7

The t statistic is given by,

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