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Questions › GATE › GATE 2025 › Q61
2 marksStatistics › Hypothesis testing › Tests for means, proportions and variancesModerateabout 3 min

GATE 2025 Question 61: Hypothesis testing

A coin has a true probability μ\muμ of turning up Heads. This coin is tossed 100 times and shows up Heads 60 times. The following hypothesis is tested:

H0:μ=0.5 (Null Hypothesis)H_0: \mu=0.5 \text{ (Null Hypothesis)}H0​:μ=0.5 (Null Hypothesis) H1:μ>0.5 (Alternative Hypothesis)H_1: \mu>0.5 \text{ (Alternative Hypothesis)}H1​:μ>0.5 (Alternative Hypothesis)

Using the Central Limit Theorem, the ppp-value of the above test is ______ (round off to three decimal places)

(Hint: If ZZZ is a random variable that follows a standard normal distribution, then P(Z≤2)=0.977P(Z \le 2) = 0.977P(Z≤2)=0.977)

Answer and worked solution

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Plain-text version

A coin has a true probability μ of turning up Heads. This coin is tossed 100 times and shows up Heads 60 times. The following hypothesis is tested: H₀: μ=0.5 (Null Hypothesis) H₁: μ>0.5 (Alternative Hypothesis) Using the Central Limit Theorem, the p -value of the above test is (round off to three decimal places) (Hint: If Z is a random variable that follows a standard normal distribution, then P(Z ≤ 2) = 0.977)

Also written as: A coin has a true probability mu of turning up Heads. This coin is tossed 100 times and shows up Heads 60 times. The following hypothesis is tested: H_0: mu=0.5 (Null Hypothesis) H_1: mu>0.5 (Alternative Hypothesis) Using the Central Limit Theorem, the p -value of the above test is (round off to three decimal places) (Hint: If Z is a random variable that follows a standard normal distribution, then P(Z <= 2) = 0.977)

Hypothesis testing has come up 47 times in 7 exams since 2007.

What this question tests

This question is on Tests for means, proportions and variances, part of Hypothesis testing in Statistics.

Applying z, t, F and chi-square tests to common problems.

TestStop has 15 past-paper questions on this subtopic.

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