A study claims that the mean age of online dating service users is 40 years. Some researchers think this is not accurate and wan
t to show that the mean age is not 40 years. Identify the null hypothesis, H0, and the alternative hypothesis, Ha, in terms of the parameter μ. Select the correct answer below: H0: μ≥40; Ha: μ<40 H0: μ≤40; Ha: μ>40 H0: μ≠40; Ha: μ=40 H0: μ=40; Ha: μ≠40
A null hypothesis is a hypothesis where a researcher generally try to disprove, it says that there is no statistically significant relationship between the two variables .
An alternative hypothesis says that there is a statistical significance between two variables.
Claim 1. : Mean age of online dating service users is 40 years.
i.e. , since it has equals sign so we take this as null hypothesis.
Claim 2. : Mean age of online dating service users is not 40 years.
In this problem you cross multiple. So on Monday 15 out 20 students vote which is 15/20 and the second one is 16 students present and we don’t know how many people voted which is x/16 so we multiple 20 by x and 16 by 15 we get 20x=240 we need to isolate x so we divide 20 on both sides and x=12