If a sample of 100 customers spends and average of $409.1 with standard deviation $28, what is a 95% confidence interval for the population mean? You should use the fact that 95% of sample means are within 1.984 standard errors of the population mean a. between $403.54 and $414.66 O b. between $393.54 and $424.66 O c. none of the other options is correct O d. between $393.54 and $414.66cooking at the scatterplot below, what is the relationship between the variables $1,000 $800 $600 weekly rent Y $400 $200 So SO $500,000 $1,000,000 House price X a. Positive relationship b. inappropriate relationship c. quadratic relationship d. no relationship