Can you help me with this problem?

- 8 2. The EPA is measuring indoor radon levels to see if homes are at an unsafe level. Tests in a sample of 200) Pittsburgh, Pennsylvania radon levels at or homes found 127 of these sampled households to have indoor interval to be appropria Of above an unsafe level . a) What assumptions must be made for use of the z confidence I FORGE priate , and are they met ? HOW TO FIND b) Construct and interpret a 95%% confidence interval for the proportion of Pittsburgh, Pennsylvania home that have an indoor radon level that is unsafe. and c) Construct and interpret a wider confidence interval, using whatever confidence level you wo what confidence level you are using. u would like. Make sure to indicate a ) An assumption about the sample 200 = (0- 635 We need to assume the 950%0 = 1.96 confidence internet and the standard deviation as well us ) the mean. b ) (2 interval , 7 127 0 . 95 furgut how 200 to get D und x ( ) You need to put a lover confidence interval than 95%% because it makes it more wider I do not remember how to find the and - when not given but it it was given, we need to plug in the 2 interval on the 19 You forgot because this problem does not use o or f, it is a proportion