An electronics store makes a profit of $69 for every standard DVD player sold and $85 for every portable DVD player sold. The ma
nager's target is to make at least $415 a day on sales from standard and portable DVD players. Write an inequality that represents the numbers of both kinds of DVD players that can be sold to reach or beat the sales target. Let s represent the number of standard DVD players sold and p represent the number of portable DVD players sold. Then graph the inequality.
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Answer:
The 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies is (0.37, 0.40).
Step-by-step explanation:
A confidence interval is an interval estimate of the population parameter. The confidence interval has a certain probability of consisting the true value of the parameter.
The (1 - <em>α</em>) % confidence interval for the population proportion (<em>p</em>) is given by:
The information provided is:
*Use a <em>z</em>-table for the critical value.
Construct the 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies as follows:
Thus, the 95% confidence interval for the proportion of adolescents who tried smoking for the first time because of exposure to smoking in the movies is (0.37, 0.40).