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Sagot :
Answer:
See below
Step-by-step explanation:
On a TI-84, select 2nd+DISTR, then select normalcdf. This is the normal cummulative distributive function which determines the percentage of data that falls between a lower and higher parameter given the mean and standard deviation in a normal distribution.
Next, you would put 55 for lower, 70 for higher, the mean (μ) as 65, and the standard deviation σ as 10. After pressing ENTER, you will get the result of 0.5328072082
This means that 53.28% of the data fall between 55 and 70 mph given a mean of 65 and a standard deviation of 10.
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