Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 out of 148 sleep for 8 hours or longer. Build a 95% confidence interval. Round to the nearest hundredth.

95% Confidence interval:  (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

95% Confidence interval:

Putting the values, we get:

(31.32%,47.04%)  is the required 95% confidence interval.

step-by-step explanation:

quartic functions has x = –1 and x = –2 as its only two real zeroes:

f(x) = a(x+2)(x+1)   a: real number