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Froggy Jumps
Froggy Jumps

T-test vs Z-test Real-Life Scenarios

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T-test vs Z-test Real-Life Scenarios

Froggy Jumps

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About this activity

Identify the test type from real-life problems.

Created by

melody arais
melody arais
Philippines
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T-test vs Z-test Real-Life Scenarios

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T-test vs Z-test Real-Life Scenarios
 

Froggy Jumps

T-test vs Z-test Real-Life ScenariosOnline version

Identify the test type from real-life problems.

by melody arais
1

A factory knows the population std dev is 5 cm for tire diameter. They sample 40 tires and test if the mean differs from 60 cm. Is this a z-test or a t-test?

2

A school suspects new teaching raises math scores. n=25, sigma unknown, sample mean 78, mu0=75. Is this a z-test or a t-test?

3

A farmer tracks crop yield, sigma unknown, n=12 fields, tests if mean yield differs from 30 tons. Z-test or T-test?

4

A manufacturer uses historical sigma 2.0 to test if new process mean is 100 units with n=50. Z-test or T-test?

5

Researchers test if a drug changes blood pressure; sigma unknown, n=9, mean difference 5 mmHg. Z-test or T-test?

6

A retailer checks if average spend differs from $120 with known std dev 15, n=100. Z-test or T-test?

7

To see if a marketing campaign changes average time on site, n=60, sigma unknown. Z-test or T-test?

8

A lab tests if mean reaction time equals 0 with large sample n=200, sigma known. Z-test or T-test?

9

If a student wants to know if the new method changes test scores, sigma unknown, n=16. Z-test or T-test?

10

A survey compares two means with independent samples, n1=30, n2=35, sigma unknown. Z-test or T-test?

 
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