Suppose a biologist collected data on the weight of 50 lab rats that were 3 weeks old. The boxplot to the right shows the weight distribution in grams. Weight () The boxplot indicates that the weight distribution of the rats is O left (negatively) skewed. O normal. O right (positively) skewed. O symmetrical.

Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…

Describe the shape of the data presented: 40.0% 35.0% 30.0% 25.0% 20.0% 15.0% 10.0% 5.0% 0.0% 36.1% 24.5% Ethnicity of Students Skewed to the right Skewed to the left Symmetric None of the above 17.1% 9.6% Asian White Hispanic Other/ Unknown 5.8% 5.3% Black Filipino 1.0% 0.6% Pacific Native Islander American

Explain MEAN SQUARES (M S) AND F RATIOS.

The data represents the heights of eruptions by a geyser. Use the heights to construct a stemplot. Identify the two values that are closest to the middle when the data are sorted in order from lowest to highest. Height of eruption (in.) 65 31 50 90 80 50 40 70 67 73 52 50 54 68 63 60 Which plot represents a stemplot of the data? OA. 3 4023578 50037 6008 70034 80 90 B. 31 4 03 5 00024 603578 70037 808 90 Identify the two values that are closest to the middle when the data are sorted in order from lowest to highest. The values closest to the middle are ☐ inches and ☐ inches. (Type whole numbers. Use ascending order.) C. 3 034 4 025 5 007 6003 7 008 8 037 9 08 77 70 43 88

Bill Alther is a zoologist who studies Anna's hummingbird (Calypte anna). (Reference: Hummingbirds, K. Long, W. Alther.) Suppose that in a remote part of the Grand Canyon, a random sample of six of these birds was caught, weighed, and released. The weights (in grams) were as follows. 3.7 2.9 3.8 4.2 4.8 3.1 The sample mean is  = 3.75 grams. Let x be a random variable representing weights of hummingbirds in this part of the Grand Canyon. We assume that x has a normal distribution and σ = 0.64 gram. Suppose it is known that for the population of all Anna's hummingbirds, the mean weight is μ = 4.30 grams. Do the data indicate that the mean weight of these birds in this part of the Grand Canyon is less than 4.30 grams? Use ? = 0.10. (a) What is the level of significance? (Enter a number.) State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? H0: μ = 4.3 g; H1: μ > 4.3 g; right-tailed H0: μ < 4.3 g; H1: μ = 4.3 g; left-tailed…

What is the best description of the shape of the data below?       Bell-shaped     Skewed right     Skewed left

Please see the picture below. I only am given one attempt at this problem.

The data show the distance (in miles) from an airport of a sample of 22 inbound and outbound airplanes. Use technology to answer parts (a) and (b). a. Find the data set's first, second, and third quartiles. b. Draw a box-and-whisker plot that represents the data set. 2.4 5.8 4.3 3.3 4.5 2.2 5.6 3.5 5.9 4.8 1.9 4.4 5.5 4.9 4.7 2.5 3.8 4.1 4.3 3.4 5.3 58 a. Find the three quartiles. Q, = Q2 = Q2 = (Type integers or decimals. Do not round.) b. Choose the correct box-and-whisker plot below. OA. O B. Oc. 6. Click to select your answer(s).

PART I: For this part, we will divide the data set into two groups: those who have infection and those who do not. Consider only those who have an infection.1. For these subjects only, construct a stemplot for the variable “heart rate”. (We will be making this into a back-to-back stemplot later, so leave room on the left side.)2. Discuss the shape of your stemplot. Is it symmetric? Positively skewed? Negatively skewed? None of these? Are there any outliers?3. How would you describe the center and the spread of this distribution?4. Find the five-number summary.5. Construct a box plot.