Claire flips a coin 4 times. Using the table, what is the probability that the coin will show tails at most once? 0
4
Number of Tails
Probability
1
0.25
2.
0.38
3
0.25
0.06
0.06
O 0.06
0.25
Ο Ο Ο Ο
0.31
O 0.69
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According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.