Apoll is conducted to determine if political party has any association with whether a person is for or against a certain bill. in the poll, 214 out of 432 democrats and 246 out of 421 republicans are in favor of the bill. assuming political party has no association, the probability of these results being by chance is calculated to be 0.01. interpret the results of the calculation. select the correct answer below: we can expect that 246 out of every 421 republicans are in support of this bill. we cannot say the results are statistically significant at the 0.05 level. at the 0.01 level of significance, political party is associated with whether a person supports this bill. at the 0.01 level of significance, political party determines whether a person supports this bill.

We cannot say the results are statistically significant at the 0.05 level.

Step-by-step explanation:

Hello!

This is a test of association for two variables. (I'm going to solve it using the chi-Square test of independence)

We have two study variables.

X1: The person belongs to a political party. (Categories: Democrat; Republican)

X2: The person's opinion about a certain bill. (Categories: support; is against)

With the information organized in a contingency table:

                    ; Supports  ; is against  ; Total

Democrat    ;     214        ;     218        ; 432

Republican  ;     246       ;     175        ; 421

Total            ;     460       ;     393       ; 853

The hiphotesis for this test are:

H₀: ∀ i = 1,2 j = 1,2 (Assumes there is no association between the political party and the opinion about a certain bill)

H₁: Assumes there is an association between the political party and the opinion about a certain bill

Level of significance.

α: 0,05

Critical region

Chi-Square statistic

=∑∑≈

This is a one-tailed (right) test with (i-1)(j-1) degrees of freedom (number of rows - 1 by number of columnes - 1)

(by my Table)

-or-

P-value: 0.3197

Using the P-value against the level of significance, 0,05, we can conclude that the there is no statistical significance.

step-by-step explanation:

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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