What is the test statistic for this significance test? O t= -2.89
O z= -2.89
The distribution of the heights of five-year-old children
has a mean of 42.5 inches. A pediatrician believes the
five-year-old children in a city are taller on average.
The pediatrician selects a random sample of 40 five-
year-old children and measures their heights. The
mean height of the sample is 44.1 inches with a
standard deviation of 3.5 inches. Do the data provide
convincing evidence at the a =0.01 level that the
mean height of five-year-old children in this city is
greater than 42.5 inches?
O r=2.89
O z = 2.89

answer: x=3 and y=4

step-by-step explanation:

she will travel a distance in the range of 3 - 11 miles

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

step-by-step explanation:

ratios represent a pattern or relationship that can be scaled.

equivalent ratios are pairs of ratios that represent the same relationship between quantities, and can be generated by multiplying or dividing both quantities in the ratio by the same factor.

in this lesson, students will use double number lines and ratio reasoning to solve ratio problems. by partitioning double number lines into proportionate intervals, students will build an understanding of equivalent ratio relationships as those that are generated by multiplying or dividing two related quantities by the same number. this lesson will build upon students' prior understanding of multiplicative comparisons, number line reasoning and equivalent fractions (while highlighting the difference between equivalent fractions and equivalent ratios); and will build toward future work in this unit on building ratio tables, and work in future grades in proportionality, scaling, and expressing and graphing linear functions.

7

step-by-step explanation: