8 is (7+4)/(7+4+5+9) = 11/25 = 0.44
9 is 5/(5+7) = 5/12 = 0.417 so I'm sorry I can't help with that one
26/40=65% of customers
65% of 800 customers=520 who think the store is clean enough
Answer:
Neither binomial nor normal distribution
Step-by-step explanation:
In binomial distribution Sumner of trials are fixed and there is only two outcomes either success or failure
But in this question there are no fixed trials and outcomes is not proper so this is not a binomial distribution.
In normal distribution there is information of mean and variance which is also not give in the question so it is also nit a normal distribution
So it is neither binomial nor normal distribution
Wayne Gretzky scored 50% more points than anyone else who ever played professional Hockey during his 20 seasons in the National Hockey League. He accomplished this amazing feat while playing in 280 fewer games than Gordy Howe, who is the previous record holder. The number of games he played during each season:
79,80,80,80,74 ,80,80,79,64,78,73,78,74,45,81,48,80,82,82,70.
a) The stem and leaf plot for the data can be comfortably obtained from the excel option as follows: XL STAT option in excel as follows:
1. In excel sheet choose XL STAT
2. Then in that choose the visualizing data- uni-variate plots.
3. In univariate plot – chart -select the stem and leaf plot.
4. In quantitative data select the data set and click ok.
A summary of the statistics and a stem and leaf plot can be obtained as follows.
