It is desired to test, at a significance level of 5%, the hypothesis that the average height of men aged 18 or over in a country is equal to or greater than 1.75. Assuming that the standard deviation of the heights in the population is 4, test this hypothesis against the alternative that it is smaller, with a sample of n=19 randomly selected men, whose heights 1.65, 1.75, 1.63, 1.81, 1.74 , 1.59, 1.73, 1.66, 1.65, 1.83, 1.77, 1.74, 1.64, 1.69, 1.72, 1.66, 1.55, 1.60, 1.62 H0: µ≥1.75
It is desired to test, at a significance level of 5%, the hypothesis that the average height of men aged 18 or over in a country is equal to or greater than 1.75. Assuming that the standard deviation of the heights in the population is 4, test this hypothesis against the alternative that it is smaller, with a sample of n=19 randomly selected men, whose heights 1.65, 1.75, 1.63, 1.81, 1.74 , 1.59, 1.73, 1.66, 1.65, 1.83, 1.77, 1.74, 1.64, 1.69, 1.72, 1.66, 1.55, 1.60, 1.62 H0: µ≥1.75
The measurements of the number of cigarettes smoked per day by a group of ten smokers are as follows: 5, 10, 3, 4, 5, 8, 20, 4, 1, 10. Carry out the hypothesis test H0 : µ= 10 vs H1 : µ < 10, assuming that the data come from a random sample from a normal population with σ = 1.2. Use a 5% significance level. 227. H0 is accepted. 228. H0 is rejected.
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