Answer:
70th percentile for the amount of time between customers entering is 30.10
Step-by-step explanation:
given data
mean = 25
to find out
What is the 70th percentile for the amount of time between customers entering Clay's store
solution
we know that here mean is
mean = ..................1
so here 25 =
and we consider time value corresponding to 70th percentile = x
so we can say
P(X < x) = 1 -
P(X < x) = 70 %
1 - = 70 %
1 - = 0.70
= 0.30
take ln both side
= ln 0.30
= 1.203973
x = 30.10
70th percentile for the amount of time between customers entering is 30.10
The answer to your question would be 7/12
I hope I answered your question today!
Answer:
Step-by-step explanation:
To test the hypothesis is the mean SAT score is less than 1520 at 5% significance level
The nul hypothesis is
The alternative hypothesis is
The test statistic is
The t - test statistics is -1.603
The t - critical value is,
The small size is small and left tail test.
Look in the column headed and the row headed in the t - distribution table by using degree of freedom is,
d.f = n - 1
= 20 - 1
= 19
The t - critical value is -1.729
The conclusion is that the t value corresponds to sample statistics is not fall in the critical region, so the null hypothesis is not rejected at 5% level of significance.
there is insignificance evidence ti indicate that the mean SAT score is less than 1520. The result is not statistically significant
The expression from the given options that is equivalent fraction -7/9 is -14/18.
<h3>What is a fraction?</h3>
Fraction can be described as the expression of numbers, which usually have the numerator and the denominator, and this do contains two integers arranged on each other.
From the given fraction,-7/9 if start o test the options by reducing them int their simplest form we will deduced that option B is correct because if we divide 14 by the factor of 2, and 18 by the factor of 2, then it will give us -7/9 which is a negative value of fraction in the question.
Therefore, option B is correct.
Learn more about fraction at:
brainly.com/question/11562149
#SPJ1
Check the complete options
A. 14/18
B. -14/18
C.21/27
D.35/45