Multiply 8 total hours by 1/4 to find the number of piano hours.
= 8 * 1/4
= (8*1)/4
= 8/4
= 2 piano hours
ANSWER: He practiced piano for 2 hours.
Hope this helps! :)
31.61 divided by 436, multiplied by 100 = 7.25
Answer:
neither normal distribution nor t-distribution
Step-by-step explanation:
given data
no of sample = 15
mean = $105
standard deviation = $30.25
to find out
whether a normal distribution or a t-distribution
solution
this is neither normal distribution nor t- distribution because here we know t, z is use for normal and difference ( n greater than 30 and Standard Deviation used z and the for n less than 30 , Standard Deviation not known use for t distribution ) so it we can say it is neither normal distribution nor t- distribution
