In a study of the accuracy of fast food drive-through orders, Restaurant A had 315 accurate orders and 63 that were not accurate. a.) Construct a 95% confidence interval estimate of the percentage of orders that are not accurate. b.) Compare the results from part(a) to this 90% confidence interval for the percentage of orders that are not accurate at Restaurant B: 0.144< p < 0.226. What do you conclude?
a) Construct a 90% confidence interval. Express the percentages in decimal form.
In: Statistics and Probability
10. State which is the most appropriate: z or t or neither. Give the critical value when you can.
95% confidence; ; ; population has an outlier
11. We want to know if the percentage of last-born children who are the most assertive has changed from the 43% estimate from a study in 2017. How many families should be selected to produce an estimate that is within 1.2% of the population percentage with 98% confidence?
In: Statistics and Probability
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 49 ounces and a standard deviation of 7 ounces. Use the Empirical Rule and a sketch of the normal distribution in order to answer these questions.
a) 68% of the widget weights lie between ___ and ____
b) What percentage of the widget weights lie between 28 and 56
ounces? %
c) What percentage of the widget weights lie above 35 ? %
In: Math
For bone density scores that are normally distributed with a mean of 0 and a standard deviation of 1, find the percentage of scores that are
a. significantly high (or at least 2 standard deviations above the mean).
b. significantly low (or at least 2 standard deviations below the mean).
c. not significant (or less than 2 standard deviations away from the mean).
In: Statistics and Probability
A shop owner increased the selling price of a shirt from $20 to $26. By what percentage was the price increased?
In: Math
American Express and other credit card issuers must by law print the Annual Percentage Rate (APR) on their monthly statements. If the APR is stated to be 14.25%, with interest paid monthly, what is the card's EFF%?
In: Finance
Why is a debt/equity ratio usually between 0.5 to 2.5 but the debt/equity percentage much, much higher like 384% for example with Lumen Technologies?
In: Finance
Assume Julian has a choice between two deposit accounts. Account A has an annual percentage rate of 7.55 percent but with interest compounded quarterly. Account B has an annual percentage rate of 7.50 percent with interest compounded daily. Which account provides the highest effective annual return?
Account A
Account B
Both provide the same effective annual return.
We don't have sufficient information to make a choice.
In: Finance
Given the following information, what is the percentage capital gain/loss between today and period 1? Calculate your answer to two decimal places (e.g., 2.51) If there is a loss indicate this by using a negative number (e.g., -4.29) Today’s Dividend = $2.67 Expected Growth rate in dividends = 4.42 Discount Rate (Required return) = 7.34
In: Finance
how do we calculate the percentage of calories?
can a amdr from protein exceed over 100%?
In: Nursing