Extremely low limits for mercury in wastewater effluent now exist. It is often thought that whenever the concentration of heavy metals is too high, the problem can be corrected by forcing industries to stop discharging the offending substance. It is possible however, for target effluent concentrations to be so low that they might be exceeded by the concentration in domestic sewage. Specimens of drinking water were collected from two residential neighborhoods, one served by the city water supply and the other served by private wells. The observed mercury concentrations are listed below. For future studies on mercury concentrations in residential areas, it would be convenient to be able to sample in either neighborhood without having to worry about the water supply affecting the outcome. Is there any difference in the mercury content of the two residential areas? The sample collection cannot be paired. Even if water specimens were collected on the same day, there will be differences in storage time, distribution time, water use patterns, and other factors. Therefore, the data analysis will be done using the independent t-test. Source City (n = 13) Private (n = 10) Table 1. Mercury concentrations. Mercury Concentrations (µg/L) 0.34 0.18 0.13 0.09 0.16 0.09 0.16 0.10 0.14 0.26 0.06 0.26 0.07 0.26 0.06 0.16 0.19 0.32 0.16 0.08 0.05 0.10 0.13

State the type of variable in each of the following cases 1- 5.1. The weight (Kg) of an Amazon package.2. The stress level (Low, Average, High) of a student taking this exam.3. The number of Long Covid-19 patients in England in 2021.4. Type of vaccine (Pfizer, AstraZeneca, Moderna).5. The annual profits (£m) of the JSA company in 2021.Your answer should be A, or B or C or D, where A, B, C, and D are defined asfollows:A. Numerical and DiscreteB. Numerical and ContinuousC. Categorical and NominalD. Categorical and Ordinal

Alex hypothesized that, on average, students study less than the recommended two hours per credit hour each week outside of class. Which of the following is Alex's alternative hypothesis? Choose the correct answer below. O A. H₁: μ=2 hours per week per credit O B. H₁: μ #2 hours per week per credit O C. H₁: μ2 hours per week per credit

Note: Use a computer application (SPSS) to solve for the following problems.

3.3 4.manufactures 37-in. high def LCD tvs in 2 separate locations, Locations I and II. The output at Location I is at most 6000 televisions/month, whereas the output at Location II is at most 5000 televisions/month. TMA is the main supplier of tvs to the Pulsar Corporation, its holding company, which has priority in having all its requirements met. In a certain month, Pulsar placed orders for 3000 and 4000 televisions to be shipped to two of its factories located in City A and City B, respectively. The shipping costs (in dollars) per television from the 2 TMA plants to the 2 Pulsar factories are as follows.       To Pulsar Factories     From TMA City A City B   Location I $7 $3   Location II $8 $9 TMA will ship x televisions from Location I to city A and y televisions from Location I to city B. Find a shipping schedule that meets the requirements of both companies while keeping costs to a minimum. (x,y)= What is the minimum cost? 6.Solve the linear programming problem by…