City Guilds Model Questions Vol1 2019 Information Technology Question 10
Practice objective / multiple choice question 10 from the 2019 City Guilds Model Questions Vol1 Information Technology examination.
A population has an unknown mean \(\mu\) for a measurement X. The population standard deviation is known to be \(\sigma = 9\). A random sample of \(n = 25\) observations yields a sample mean \(\bar{x}=48\). Test the null hypothesis \(H_{0}: \mu = 45\) against the two‑tailed alternative at the 5 % significance level using the appropriate z‑test. Compute the test statistic, the p‑value (to three decimal places), and state the conclusion.
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This is City Guilds Model Questions Vol1 2019 Information Technology Question 10. It is one of the objective questions from the 2019 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Hard .
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