40/50 is the ratio because the cos formula is adjacent over hypotenuse and you can reduce it to 4/5 as a fraction :)
Answer:
Test statistic Z= 0.13008 < 1.96 at 0.10 level of significance
null hypothesis is accepted
There is no difference proportion of positive tests among men is different from the proportion of positive tests among women
Step-by-step explanation:
<em>Step(I)</em>:-
Given surveyed two random samples of 390 men and 360 women who were tested
first sample proportion

second sample proportion

Step(ii):-
Null hypothesis : H₀ : There is no difference proportion of positive tests among men is different from the proportion of positive tests among women
Alternative Hypothesis:-
There is difference between proportion of positive tests among men is different from the proportion of positive tests among women

where

P = 0.920

Test statistic Z = 0.13008
Level of significance = 0.10
The critical value Z₀.₁₀ = 1.645
Test statistic Z=0.13008 < 1.645 at 0.1 level of significance
Null hypothesis is accepted
There is no difference proportion of positive tests among men is different from the proportion of positive tests among women
Hello!
<h2>Answer: </h2>
23. 138 people voted for Nyemi, 69 people voted for Luke, and 23 people voted for Natalie.
24. Reina did not ride 11/16 of the rides.
<h2>
Explanation:</h2>
23:
3 ÷ 5 = 0.6
230 × 0.6 = 138
230 × 0.3 = 69
230 × 0.1 = 23
24:
We know that Alberto rode 5/8 of the rides at the park, and Reina rode half of this.
5/8 × 1/2 = 5/16
16 - 5 = 11
The lower quartile is 21 because when you make it in order and find the median you seperate it then when you get the lower median it is 21
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