A polling company has been hired to determine the approval rating for a local member of Congress. The company completed the poll by creating a survey and instructing representatives to stand outside a mall to give the survey to departing shoppers. The polling representatives
were also instructed to take responses only from participants who were male. Then, the polling company published a report which put the
congressperson's approval rating at 79%.
Why could this sample be biased?
OA. The representatives of the company only gave the survey to a select group, as opposed to a wider, more representative
sample.
ОВ.
The representatives of the company were male.
Oc.
The mall was outside the congressperson's local area.
OD
The survey questions were biased toward the congressperson's opponent.

4+(2+x) can you me solve this problem

Explain how to graph a scatterplot and its regression line using a regression calculator.

Atechnician compares repair costs for two types of microwave ovens (type i and type ii). he believes that the repair cost for type i ovens is greater than the repair cost for type ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.