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A university conducts a study about the extension of library working hours. From a random
sample of 300 freshmen, 180 of them indicated that they would use the library more if the
hours were extended. In an independent random sample of 200 sophomores, 125 of them
responded that they would use the library more if the hours were extended. Estimate the
difference in proportion of freshmen and sophomores responding affirmatively to this study.
Use %95 confidence level. Is the difference statistically significant? Why?​

Which segments are congruent? o jn and ln o jn and nm o in and nk onk and nm

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Th perimeter of a rectangular garden is 150 feet. the length is 50 feet longer than the width, w. which equation could be used to calculate the width of the garden? a.) 2w+ 2(w-50) =150 b.) 2w+50 + 2w =150 c.) 2(w+50) + w =150 d.) 2w+ 2(w + 50) = 150 need asap. will give brainliest !