Suppose at your university you are asked to find the relationship between weekly hours spent studying (study) and weekly hours spent working (work). does it make sense to characterize the problem as inferring whether study ""causes"" work or work ""causes"" study? explain.

Explanation:

Usually students have fixed number of hours a week to choose between studying and working. So, it is incorrect to say that study causes work or work causes study.

Students rationally choose total hours as a mix of studying and working. It mainly depends on rationale and preferences of a student.

a. 2.13. b. (30.53, 34.79). c. The mean prices for two in mid-range restaurants in Hong Kong are relatively less than those in Tokyo restaurants.

Explanation:

The size of the sample is 42 and the mean of the sample is ∑ = 32.66 and the standard deviation of the sample (σ) is √[∑(-μ)^2 - 1] = √46.6092 = 6.8271

a. α = 1 - (95/100) = 0.05; α/2 = 0.025; the degree of freedom = n-1 = 42-1 = 41; tα/2 = t0.025 = 2.02. Thus, the error margin = (tα/2)*(σ/√n) = 2.02*(6.83/√42) = 2.1279

b. Lower level limit = 32.66 - 2.1279 = 30.5321; Upper level limit = 32.66+2.1279 = 34.7879. The interval estimate = (mean± margin of error) = (30.53, 34.79).

c. The mean prices for two in mid-range restaurants in Hong Kong are relatively less than those in Tokyo restaurants.