Asked by Kelsey Michalak on May 15, 2024
Verified
Suzie has installed a new spam blocker program on her email.She used to receive an average of 20 spam emails a day.Is the new program working?
A) H0\mathrm { H } _ { 0 }H0 : ? > 20 HA\mathrm { H } _ { \mathrm { A } }HA : ? = 20
B) H0\mathrm { H } _ { 0 }H0 : ? = 20 HA\mathrm { H } _ { \mathrm { A } }HA : ? > 20
C) H0\mathrm { H } _ { 0 }H0 : ? = 20 HA\mathrm { H } _ { \mathrm { A } }HA : ? < 20
D) H0\mathrm { H } _ { 0 }H0 : ? = 20 HA\mathrm { H } _ { \mathrm { A } }HA : ? ? 20
E) Not enough information is given.
Spam Blocker
A software tool or system designed to detect and prevent unsolicited or unwanted emails from reaching a user's inbox.
Spam Emails
Unwanted, unsolicited digital messages often sent in bulk to a large list of recipients.
- Detect and carry out appropriate hypothesis testing procedures according to the given situations.
- Select the fitting directional method (upper-tailed, lower-tailed, two-sided) for hypothesis examination.
Verified Answer
YB
Ya?mur Balc?larMay 17, 2024
Final Answer :
C
Explanation :
The null hypothesis ( H0\mathrm { H } _ { 0 }H0 ) should reflect the situation before the change (receiving an average of 20 spam emails a day), and the alternative hypothesis ( HA\mathrm { H } _ { \mathrm { A } }HA ) should reflect the expected outcome if the spam blocker is working (receiving less than 20 spam emails a day). Therefore, option C is correct.
Learning Objectives
- Detect and carry out appropriate hypothesis testing procedures according to the given situations.
- Select the fitting directional method (upper-tailed, lower-tailed, two-sided) for hypothesis examination.
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