The sum of 4 times a number and 7 more than the number is 80
1 answer:
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Answer:
a) The claim is not plausible
b) claim is plausible and the type of bias here is response bias
Step-by-step explanation:
Given data:
Number of political parties = 4
coffee party got the support of 435 out of 1183 randomly selected voters in a poll conducted.
<u>A)</u><u> Construct and interpret a 98% confidence interval to estimate the proportion of voters who support the coffee party </u>
H0 ( null hypothesis ) : p = 0.42
Ha ( alternate hypothesis ) : p ≠ 0.42
z value for 98% confidence interval = 2.326
using 98% confidence interval the value of p = ( 0.3668, 0.3686 )
hence the claim is not plausible
<u>B) Determine the type of bias </u>
Assume the actual number of people = 1200
and 17 people did not respond
hence number of people who responded = 1200 - 17 = 1183
Therefore the claim by the manager is plausible because 17 people did not respond and the type of bias here is response bias
<em>attached below is a detailed solution of the problem of the A part </em>
If he uses 85 tiles, 28 tiles will be black
<h3>Sequence and Pattern</h3>The formation of the tiles of the floor follows an arithmetic sequence or pattern
The pattern is given as:
- Blue
- White
- Black
Given that the total number of tile used is 85, and the black tile is always in the third position.
The highest number less than or equal to 85 that is divisible by 3 is 84.
Next, we divide 84 by 4
Hence, 28 of the tiles will be black
Read more about sequence and patterns at: