4. This study is based on a random sample of [ Select ] * Gmail Smart Compose users. 63 39 62 40

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 42PFA
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3. Answer question 4

4. This study is based on a random sample of
v [ Select ]
* Gmail Smart Compose users.
63
39
62
40
Transcribed Image Text:4. This study is based on a random sample of v [ Select ] * Gmail Smart Compose users. 63 39 62 40
A typical U.S. adult types 40 words per minute (wpm), on average. In
order to assess if the mean typing speed for all users of Gmail using
Smart Compose has significantly improved, we took a random sample
of Gmail Smart Compose users and recorded their typing speeds. We
would like to test Ho: µ = 40 wpm versus Ha: µ > 40 wpm.
The relevant R output provided below.
sd se(mean)
mean
40.6
2.72
0.343
One Sample t-test
data:
wpm
t = 1.75, df =
alternative hypothesis: true mean is greater than 40
62, р-value
= 0.043
Transcribed Image Text:A typical U.S. adult types 40 words per minute (wpm), on average. In order to assess if the mean typing speed for all users of Gmail using Smart Compose has significantly improved, we took a random sample of Gmail Smart Compose users and recorded their typing speeds. We would like to test Ho: µ = 40 wpm versus Ha: µ > 40 wpm. The relevant R output provided below. sd se(mean) mean 40.6 2.72 0.343 One Sample t-test data: wpm t = 1.75, df = alternative hypothesis: true mean is greater than 40 62, р-value = 0.043
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