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bagirrra123 [75]
3 years ago
5

"A movie data base claims that the average length of movies is 117 minutes. A researcher collected a random sample of 160 movies

released during 2010–2015. The mean length of those movies is 118.44 minutes and the standard deviation is 8.82. The researcher wonders if the actual mean length of movies released during 2010-2015 is more than the data base value and wants to carry out a hypothesis test. What are the null and alternative hypothesis?"
Mathematics
1 answer:
Sergeu [11.5K]3 years ago
3 0

Answer:

We need to conduct a hypothesis in order to check if the mean the actual mean length of movies released during 2010-2015 is more than the data base value (a;ternative hypothesis) ,so then the system of hypothesis would be:  

Null hypothesis:\mu \leq 117  

Alternative hypothesis:\mu > 117  

Step-by-step explanation:

Data given and notation  

\bar X=118.44 represent the sample mean

s=8.82 represent the sample standard deviation

n=160 sample size  

\mu_o =117 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean the actual mean length of movies released during 2010-2015 is more than the data base value (a;ternative hypothesis) ,so then the system of hypothesis would be:  

Null hypothesis:\mu \leq 117  

Alternative hypothesis:\mu > 117  

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