bus stat

For the following type of data set, would you be more interested in looking at the mean, median, or mode? - The price of similar sofas at different furniture stores

- mean - the prices of sofas are quantitative data with no outliers

Find the 110% trimmed mean of the following data. If necessary, round to one more decimal place than the largest number of decimal places given in the data. 0.34, 0.41, 0.42, 0.43, 0.44, 0.47, 0.51, 0.55, 0.56, 0.58, 0.66, 0.66, 0.67, 0.67, 0.70, 0.73, 0.74, 0.76, 0.78, 0.80

0.5969

A researcher wishes to conduct a study of the color preferences of new car buyers. Suppose that 50% of this population prefers the color green. If 10 buyers are randomly selected, what is the probability that at most 7 buyers would prefer green? Round your answer to four decimal places.

0.9453

Assume the random variable X has a binomial distribution with the given probability of obtaining a success. Find the following probability, given the number of trials and the probability of obtaining a success. Round your answer to four decimal places. P(X≤3), n=7, p=0.2

0.9667

In manufacturing integrated circuits, the yield of the manufacturing process is the percentage of good chips produced by the process. The probability that an integrated circuit manufactured by the Ace Electronics Company will be defective is p=0.01. If a random sample of 18 circuits is selected for testing, answer the following questions. Step 1 of 2 : What is the probability that no more than one integrated circuit will be defective in the sample? Round your answer to four decimal places, if necessary.

0.9862

The Alvin Secretarial Service procures temporary office personnel for major corporations. They have found that 60% of their invoices are paid within ten working days. A random sample of 17 invoices is checked. What is the probability that at most 14 of the invoices will be paid within ten working days? Round your answer to four decimal places.

0.9877

A pizza delivery chain advertises that it will deliver your pizza in 2020 minutes from when the order is placed. Being a skeptic, you decide to test and see if the mean delivery time is actually more than 20 minutes. For the simple random sample of 8 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 22.2 minutes with a standard deviation of 3.1 minutes. Assume that the population distribution is approximately normal. Perform a hypothesis test using a 0.025 level of significance. Step 2 of 3: Find the T

2.007

A pizza delivery chain advertises that it will deliver your pizza in 2020 minutes from when the order is placed. Being a skeptic, you decide to test and see if the mean delivery time is actually more than 20 minutes. For the simple random sample of 8 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 22.2 minutes with a standard deviation of 3.1 minutes. Assume that the population distribution is approximately normal. Perform a hypothesis test using a 0.025 level of significance. Step 1 of 3 : State the null and alternative hypotheses for the test. Fill in the blank below.H0Ha: μ=20: μ ______ 20

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Determine if the correlation between the two given variables is likely to be positive or negative, or if they are not likely to display a linear relationship. The retail price of a particular gaming system and the number of units sold at that price

Negative

Determine if the correlation between the two given variables is likely to be positive or negative, or if they are not likely to display a linear relationship. your daily calorie intake and your GPA

No correlation

Determine if the correlation between the two given variables is likely to be positive or negative, or if they are not likely to display a linear relationship. The rating of the school district for a home and its selling price

Positive

Describe the relationship indicated by the correlation coefficient, r=0.97

Tightly clustered in a positive linear fashion

A parenting magazine reports that the average amount of wireless data used by teenagers each month is 5Gb. For her science fair project, Ella sets out to prove the magazine wrong. She claims that the mean among teenagers in her area is less than reported. Ella collects information from a simple random sample of 44 teenagers at her high school, and calculates a mean of 4.2Gbper month with a standard deviation of 1.1Gb per month. Assume that the population distribution is approximately normal. Test Ella's claim at the 0.025 level of significance. Step 3 of 3 : Draw a conclusion and interpret the decision.

We fail to reject the null hypothesis and conclude that there is an insufficient amount of evidence at a 0.025 level of significance that the average amount of data used by teenagers each month is less than 5 Gb

A pizza delivery chain advertises that it will deliver your pizza in 4040 minutes from when the order is placed. Being a skeptic, you decide to test and see if the mean delivery time is actually more than 4040 minutes. For the simple random sample of 88 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 47.047.0 minutes with a standard deviation of 7.17.1 minutes. Assume that the population distribution is approximately normal. Perform a hypothesis test using a 0.0250.025 level of significance.

We reject the null hypothesis and conclude that there is sufficient evidence at a 0.025 level of significance that the mean delivery time is actually more than 40 minutes

Determine whether or not the given procedure results in a binomial distribution. If not, identify which condition is not met. Spinning an American roulette wheel 78 times and recording the number of times the ball lands on green.

Yes