You want to rent an unfurnished one-bedroom apartment in Boston next year. The mean monthly rent for a random sample of 12 apartments advertised in the local newspaper is $1500. Assume that the standard deviation is $250. Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community. (Round your answers to two decimal places.)

Step-by-step explanation:

We want to determine a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.

Number of sample, n = 12

Mean, u = $1500

Standard deviation, s = $250

For a confidence level of 95%, the corresponding z value is 1.96.

We will apply the formula

Confidence interval

= mean ± z ×standard deviation/√n

It becomes

1500 ± 1.96 × 250/√12

= 1500 ± 1.96 × 72.17

= 1500 ± 141.45

The lower end of the confidence interval is 1500 - 141.45 = 1358.55

The upper end of the confidence interval is 1500 + 141.45 = 1641.45

Therefore, with 95% confidence interval, the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community is between $1358.55 and $1641.45

answer:

c 60% on edg

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.