The marketing team at an internet music site wants a better understanding of who their customers are. They send out a survey to 25 customers​ (and use an incentive of​ $50 worth of downloads to guarantee a high response​ rate) asking for demographic information. One of the variables is the​ customer's age. For the 25​ customers, the ages are shown to the right. Complete parts​ a) through​ d).

a) Find the quartiles using technology.

John's poll was taken to determine which of 13 major industries are doing a good job of serving their customers. Among the industries rated most highly by Americans for serving their customers were computer hardware and software companies, car manufacturers, and airlines. The industries rated lowest on serving their customers were tobacco companies, managed care providers, and health insurance companies. Seventy-one percent of those polled responded that airlines are doing a good job serving their customers. Suppose due to rising ticket prices, a researcher feels that this figure is now too high. He takes a poll of 463 Americans, and 324 say that the airlines are doing a good job of serving their customers. Does the survey show enough evidence to declare that the proportion of Americans saying that the airlines are doing a good job of serving their customers is significantly lower than stated in the Harris poll? Let alpha equal .10. If the researcher fails to reject the null hypothesis and if the figure is actually 60 % now, what is the probability of committing a Type II error? (show calculations, please, don't use excel) thanks

1. A retail store runs an advertising campaign on a radio station. They decide to measure the effectiveness of the campaign by measuring the increase in customers compared to previous days. They choose 35 days at random, and find the average number of customers to have increased by 83.3 customers per day. Historically, the number of customers per day has a standard deviation of 17.5 customers. What is the 95% confidence interval for the population mean increase in customers?

Select one:

a. 79.51 to 87.09

b. 79.54 to 87.06

c. 77.50 to 89.10

d. 55.70 to 110.90

e. 78.42 to 88.18

2. A movie theater in a tourist destination notices that their attendance improves when it is rainy outside. For the past year, the standard deviation of movie attendance has been 6.1 people. The theater looks at the attendance of 42 movies while it was raining last month, and the average attendance was 91.2 people per showing. What is the 80% confidence interval?

Select one:

a. 89.65 to 92.75

b. 73.19 to 109.21

c. 90.00 to 92.40

d. 89.36 to 93.04

e. 91.01 to 91.39

1. A new restaurant keeps track of the number of nightly customers at monthly intervals over the course of a year. The restaurant has done very little advertising; most of its publicity is by word of mouth but its number of customers is increasing. The restaurant does not have a seasonal difference in number of customers (for example, no summer crowds).

1. Using the data below, fit each an exponential regression model to the data using Excel.

1. Write down your regression equation.

2. Enter the regression equation into your calculator and use the table feature to estimate when the restaurant will have 400 people.

3. What does the model predict about the number of customers in 18 months?

4. What does the model predict as time goes on? For example how many customers will be at the restaurant in 300 months (25 years), is this reasonable?

5. What is the growth rate of your regression equation? Find and interpret it.

For finding p-values, there are two approaches - bootstrap or use a distribution for the test statistic under the null hypothesis (like standard normal, T, Chi-Square, F). Using the distribution approach requires some assumptions (such as normality, or approximate normality, of the population distribution, large sample sizes, etc.) For the following testing scenarios, write down the assumptions that are needed:

a. Testing of equality of proportions between two categorical variables - p1 and p2. Ho: p1 = p2 vs H1: p1 /= p2. Sample size n1 and n2

b. Testing for equality of proportions between three categorical variables using the Chi-Square Goodness of Fit approach Ho: p1 = p2 = p3 vs H1: at least one pair of pi's is not the same. Sample sizes n1, n2, n3. Total sample size n = n1+n2+n3

a. Testing of equality of population means between three populations using the ANOVA table. Ho: mu1 = m2 = mu3 vs H1: not all population means are the same Sample size n1, n2, n3

Marge owns three stocks: Apple, Google and Facebook. She expects the price per share of each stock one month from now to be 120, 60, and 60 dollars, respectively. An analysis of the returns to holding these three stocks shows that the monthly standard deviation of the price per share for each stock is 10, 8, and 8 dollars, respectively. This same analysis also concludes the covariance between the price per share of Apple stock and the price per share of Google stock is -36 (dollars squared), between Apple and Facebook it is +24, and between Google and Facebook it is +19. Assume Marge owns 200 shares of Apple, 100 shares of Google, and 50 shares of Facebook.

(a) Compute the expected value of Marge’s portfolio one month from now.

(b) Compute the standard deviation of the value of her portfolio one month from now.

(c) Marge’s sister, Maggie, owns 200 shares of Apple, 50 shares of Google, and 100 shares of Facebook. Who has the better portfolio? Explain and show any related work.

Question 8. For finding p-values, there are two approaches - bootstrap or use a distribution for the test statistic under the null hypothesis (like standard normal, T, Chi-Square, F). Using the distribution approach requires some assumptions (such as normality, or approximate normality, of the population distribution, large sample sizes, etc.)

For the following testing scenarios, write down the assumptions that are needed

a. Testing of equality of proportions between two categorical variables - p1 and p2.

Ho: p1 = p2 vs H1: p1 /= p2. Sample size n1 and n2

b. Testing for equality of proportions between three categorical variables using the Chi-Square Goodness of Fit approach

Ho: p1 = p2 = p3 vs H1: at least one pair of pi's is not the same. Sample sizes n1, n2, n3. Total sample size n = n1+n2+n3

a. Testing of equality of population means between three populations using the ANOVA table.

Ho: mu1 = m2 = mu3 vs H1: not all population means are the same Sample size n1, n2, n3

Time spent using​ e-mail per session is normally​ distributed, with mu equals 8 minutes and sigma equals 2 minutes. Complete parts​ (a) through​ (d).

a. If you select a random sample of 25 ​sessions, what is the probability that the sample mean is between 7.8 and 8.2 ​minutes?

=0.3830 ​(Round to three decimal places as​ needed.)

b. If you select a random sample of 25 ​sessions, what is the probability that the sample mean is between 7.5 and 8 ​minutes?

= 0.3944 ​(Round to three decimal places as​ needed.)

c. If you select a random sample of 200 ​sessions, what is the probability that the sample mean is between 7.8 and 8.2 ​minutes? ​

d. Explain the difference in the results of​ (a) and​ (c). Choose the correct answer below. The sample size in​ (c) is greater than the sample size in​ (a), so the standard error of the mean​ (or the standard deviation of the sampling​ distribution) in​ (c) is ......... than in​ (a). In​ general, as the standard deviation​ decreases, values become ........ concentrated around the mean.​ Therefore, the probability of a region that includes the mean will always ........ when the sample size increases.

Python program

A number game machine consists of three rotating disks labelled with the numbers 0 to 9 (inclusive). If certain combinations of numbers appear when the disks stop moving, the player wins the game.

The player wins if

• the first and third numbers are the same, and the second number is less than 5, or
• all three numbers are the same, or
• the sum of the first two numbers is greater than the third number;

otherwise the player loses.

Write a Python program to simulate this number game by randomly generating 3 integer values between 0 and 9 (inclusive), and printing whether the player has won or lost the game.

To randomly generate a number between and including 0 and 9, use the randintmethod from random library module. For example, x = random.randint(1,100)will automatically generate a random integer between 1 and 100 (inclusive) and store it in x.

Sample output 1:

Random numbers: 2 3 5
You lose.

Sample output 2:

Random numbers: 7 7 0
You win!

1. On the “AJE” worksheet, prepare the adjusting journal entries in good form for the following items. Identify each entry by letter in Column B. Round all answers to the nearest dollar. You may omit explanations. Leave a blank row between each journal entry. All the accounts you need are given on the worksheet. Use only these accounts. Prepare journal entries and financial statements for the year ended December 31, 2017. No adjusting entries have been made since December 31, 2016. Do not use "Cash" account only one balance sheet account and one income statement account.

d. Store supplies totaling $14,800 were purchased during the year and were immediately expensed. A physical count of the store supplies on hand December 31, 2017, indicates a balance of $2,100.

The entry im asking you to make IS the adjusting entry.

This is the only other information i have!