5 : 3 = 30:x where x = number of south american butterflies
5/3 = 30 / x
5x = 90
x = 18
there are 18 south american butterflies in the park
Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.
Answer:
According to Google, -10.5
Step-by-step explanation:
Formula calculator.
Answer:
2995
Step-by-step explanation:
The first quartile (Q1) is defined as the middle number between the smallest number and the median of the data set
1127
1482
2995
3009
3250
3250
3445
3449
4000
6120
rearranging the data sets from the least to the highest
the middle number of the data sets is 3250
the middle number between the smallest number and the median of the data set is 2995
Answer:
D
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
y = - x - 2 ← is in slope- intercept form
with slope m = -
Given a line with slope m then the slope of a line perpendicular to it is
= - = - = , thus
y = x + c ← is the partial equation of the perpendicular line
To find c substitute (- 12, 7) into the partial equation
7 = - 16 + c ⇒ c = 7 + 16 = 23
y = x + 23 → D