Mathematics: What is the least number of points you must plot to have examples of all four sets of numbers including at least one positive integer and one negative integer

What is the least number of points you must plot

mary9590

19.05.2023

(2.880, 11.320)

Step-by-step explanation:

Keep in mind the formula for a 2-sample t-interval.

t = x1 - x2 ± t* $\sqrt{\frac{s1^{2}}{n1} +\frac{s2^{2}}{n2} }$

First calculate df the degrees of freedom and t* the critical t.

df = 23.24 (from technology: STAT->TEST->0)

t* = invt(.975, 23.24) = 2.067

Now plug them in and solve.

t = x1 - x2 ± t* $\sqrt{\frac{s1^{2}}{n1} +\frac{s2^{2}}{n2} }$

= 29.7 - 22.6 ± 2.067 $\sqrt{\frac{3^{2}}{29} +\frac{9^{2}}{21} }$

= 7.1 ± 4.220

= (2.880, 11.320)

0,0(0 оценок)