McDonald’s advertises that its ice cream cones have a mean weight of 3.2 ounces.  A human server starts and stops the machine that dispenses the ice cream, so we might expect some variation in that amount.  A sample on five ice cream cones was taken, giving values of 3.9, 3.6, 2.8, 3.4, and 2.9 ounces.  Given that the weights of McDonald’s ice cream cones are an approximate normal distribution, use the P-Value method of hypothesis testing to test if McDonald’s claim is valid for a=0.05?

The population mean, u, is a measure of

The arm span and foot length were measured (in centimeters) for each of the 19 students in a statistics class and displayed in the scatterplot. An analysis Using the computer output, what is the predicted foot length for a student with an arm span of 160 cm? 5.79 cm was completed and the computer output is shown. 22.15 cm 29.76 cm Arm Span vs. Foot Length 29.80 cm 29 27 19 170 100 105 100 Foot Length (cm)

A boat capsized and sank in a lake. Based on an assumption of a mean weight of 132 lb, the boat was rated to carry 70 passengers (so the load limit was 9,240 lb). After the boat sank, the assumed mean weight for similar boats was changed from 132 Ib to 170 lb. Complete parts a and b below.

Is the height (in inches) of students in this class a quantitative or qualitative variable?

determine whether the samples are independent or dependant. To test the effectiveness of a drug, cholesterol level are measured in 60 men and 60 women after the treatment.

frog. The thumb length for the female frog has a mean of 6.58 mm a. Find the standardized version of x. b. Determine and interpret the z-scores for thumb lengths of 7.1 mm and 6.1 mm. Round your answers to two decimal places. Find tho oto

The state Government gives grants to low-income undergraduate students. According to the National Postsecondary Student Aid Study conducted by the U.S. Department of Education in 2008, the average Pell grant award for 2007-2008 was $2,600. We wonder if the mean amount is different this year for Pell grant recipients at San Jose State University. Suppose that we randomly select 50 Pell grant recipients from San Jose State University. For these 50 students, the mean Pell grant award is $2,450 with a standard deviation of $600. Let µ = the mean amount of Pell grant awards received by San Jose State University Pell grant recipients this year. We test the hypotheses: H0: μ = 2,600 , Ha: μ ≠ 2,600. The sample size is greater than 30, so a t-model is a good fit for the sampling distribution. What is the t-test statistic? What is the P-value?

To investigate whether one-pound bags of potato chips actually contain a full pound of chips, a skeptical statistics student goes to the supermarket and weighs every bag on the shelf. To analyze these data, what statistical test should i use?

A research company surveyed 1024 people who routinely fly for business travel purposes and found that 384 of them were generally satisfied with the flights they took. Find the standard error for the sample proportion of people who routinely fly for business travel purposes and are generally satisfied with the flights they take. Enter your answer as a decimal rounded to three decimal places.