These are the means and standard deviations for samples of prices from two different brands of shoes.Brand A Brand BMean: $50 Mean: $40Standard deviation: $5 Standard deviation: $8Select the two true statements.A.Brand A has a lower average price than brand B.B.Brand A's prices are less spread out than brand B's prices.C.Brand A's prices are more spread out than brand B's prices.D.Brand A has a higher average price than brand B.SUBMITarrow_backPREVIOUS

Here are the prices of five new pairs of hockey skates, in dollars: 59, 60, 65, 99, 175.The standard deviation is about $49.If a sixth pair of skates is added to the data that has a price of $450, what happens to the standard deviation?A.The new standard deviation is greater than $49.B.The new standard deviation is $499.C.The new standard deviation is less than $49.D.The standard deviation is still $49.SUBMITarrow_backPREVIOUS

A sales consultant for Herron Pharmaceuticals wished to confirm that their packet of 24 paracetamol tablets was cheaper at the retail level than their rival product. The sales consultant collected price data from two independent samples, of size 27 for Herron and 18 for the rival company. These yielded an average and variance for the retail price of Herron's product of 399 cents and 76 cents squared respectively, and 402 cents and 61 cents squared for the rival. Under the usual assumptions, determine a 95% confidence interval for the price difference (use Herron minus rival) stating only the upper limit of the interval in cents (round to the nearest whole number).

Which of the following allows shoppers to make accurate comparisons between item sizes and brands?Per unit costExpiration dateSale priceBulk cost

h. Which pairs of means are statistically different?

These goods are on sale. Thus, these are _______ than the others. Amuch cheaperBthe cheapestCmuch cheapDthe cheaper