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Recent questions in High school statistics

he298c 2021-09-23

Consider the following three data series (Series A, Series B, Series C), representing three random samples of a variable with 7 observation (n= 70 each:
Series A: (1, 2, 3, 4, 5, 6, 7)
Series B: (1, 2, 4, 4, 4, 6, 7)
Series C: ( 1, 4, 4, 4, 4, 4, 7)
Which series has the largest kurtosis?

Tabansi 2021-09-23

Use the two-way table of data from another student survey to answer the following question.

$\begin{array}{cccc} L i k e A e r o b i c & E x e r c i s e \\ L i k e W e i g h t L i f t i n g & Y e s & N o & T o t a l \\ Y e s & 7 & 14 & 21 \\ N o & 12 & 7 & 19 \\ T o t a l & 19 & 21 & 40 \end{array}$
What is the marginal relative frequency of students surveyed who like weight lifting?

Nannie Mack 2021-09-22

Whille comparing two distributions, the reason why it is best to use relative frequency histograms rather than frequency histogram.

Sinead Mcgee 2021-09-21

Copperhead and Tiger Snakes. S. Fearn et al. compare two types of snakes in the article “Body Size and Trophic Divergence of Two Large Sympatric Elapic Snakes in Tasmania” (Australian Journal of Zoology, Vol. 60, No. 3, pp. 159-165). Tiger snakes and lowland copperheads are both large snakes confined to the cooler parts of Tasmania. The weights of the male lowland copperhead in Tasmania have a mean of 812.07 g and a standard deviation of 330.24 g; the weights of the male tiger snake in Tasmania have a mean of 743.65 g and a standard deviation of 336.36 g.
a. Determine the z-scores for both a male lowland copperhead snake and a male tiger snake whose weights are 850 g.
b. Under what conditions would it be reasonable to use z-scores to compare the relative standings of the weights of the two snakes?
c. Assuming that a comparison using z-scores is legitimate, relative to the other snakes of its type, which snake is heavier?

Albarellak 2021-09-20

Kruskal-Wallis test is a generalization of Mann-Whitney test for more than two independent sample
Select one:
True
False

slaggingV 2021-09-20

The following problem
1. If X and Y's combined probability distribution is given by
$f (x, y) = \frac{x + y}{30}$ for $x = 0, 2, 3$ ; $y = 0, 1, 2$
Find
a. $P (X \leq 2, Y = 1)$
b. $P (X > 2, Y \leq 1)$
c. $P (X > Y)$

Caelan 2021-09-20

Use the two-way table of data from another student survey to answer the following question.
$\begin{array}{cccc} L i k e A e r o b i c & E x e r c i s e \\ L i k e W e i g h t L i f t i n g & Y e s & N o & T o t a l \\ Y e s & 7 & 14 & 21 \\ N o & 12 & 7 & 19 \\ T o t a l & 19 & 21 & 40 \end{array}$
Find the conditional relative frequency that a student likes to lift weights, given that the student likes aerobics.

Dolly Robinson 2021-09-18

Tom is creating a scatterplot that depicts the perimeter and area of a square. (If s is the length of a side of a square, the perimeter is 4s and the area is s2). He sets up these coordinates in which the explanatory variable is the perimeter and the response variable is the area. (10, u) (12, v) (20, w) (24, x) (36, y) (z, 49) a. Find the values of u, v, w, x, y, and z. b. If the points are put on a scatterplot, do they depict a positive or negative correlation?

rocedwrp 2021-09-18

Is $E (X^{2})$ equal to ${(E (X))}^{2}$ ?

opatovaL 2021-09-18

How many different three-letter combinations can be created from the letters E, F, G, H, I if each combination must contain either all vowels or all consonants, and letters can repeat?

Jaden Easton 2021-09-18

You have a single piece dice. What are the odds of:
a) Throwing it and getting 6?
b) Throwing it and getting an odd number?

Annette Arroyo 2021-09-18

What is the second name for a two-way frequency table of categorical data?
a. a two-way by two-way table
b. a multiple-treatment table
c. an equal probability table
d. a contingency table

sibuzwaW 2021-09-18

What is a contingency table?

floymdiT 2021-09-17

Use the two-way table of data from another student survey to answer the following question.
Like Weight Lifting Yes No Total Like Aerobic Yes 71219 Exercise No 14721 Total 211940
What is the conditional relative frequency that a student likes to lift weights, given that the student does not like aerobics?

banganX 2021-09-17

Please, answer the question: if there is no association between the categorical variables, which of the following is true?
a) The observed counts in the two-way table should be close to the expected points.
b) The observed counts in the two-way table will be different from the expected points.
c) The chi-square statistic will have a large value and the observed counts in a two-way table will be very different from the expected points.
d) The chi-square statistic will have a large value.

necessaryh 2021-09-17

The measures which give you the spread of the data values are
a. Measures of location
b. Measures of dispersion
c. Measures of central tendency
d. Measures of percentiles.

ringearV 2021-09-17

The _ is always plotted on the y-axis of a scatterplot.

aflacatn 2021-09-16

Please tell whether the expression is TRUE or FALSE.
“If the conditional distribution in a two-way table are similar to each other, the P-value of the test is close to zero”.

sanuluy 2021-09-16

Use a two-way table to explore the probabilities related to each group or category in the table.

Khadija Wells 2021-09-16

Find P(A) using the following table.

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